三谷 朋弘 (ミタニ トモヒロ)

農学研究院 基盤研究部門 畜産科学分野准教授
Last Updated :2024/12/06

■研究者基本情報

学位

  • 博士(農学), 北海道大学

Researchmap個人ページ

研究キーワード

  • 家畜生産システム
  • 飼料
  • 乳牛
  • 放牧
  • 畜産学
  • 農林水産物

研究分野

  • ライフサイエンス, 動物生産科学

■経歴

経歴

  • 2021年10月 - 現在
    北海道大学, 大学院農学研究院, 准教授, 日本国
  • 2021年04月 - 2021年09月
    北海道大学, 北方生物圏フィールド科学センター, 准教授, 日本国
  • 2015年02月 - 2021年03月
    北海道大学, 北方生物圏フィールド科学センター, 助教
  • 2014年09月 - 2015年01月
    北海道大学, 北方生物圏フィールド科学センター, 学術研究員
  • 2011年09月 - 2014年08月
    北海道大学, 大学院農学研究院, 特任助教
  • 2011年07月 - 2011年08月
    北海道大学, 大学院農学研究院, 博士研究員
  • 2009年04月 - 2011年06月
    北海道大学, 創成研究機構, 特任助教
  • 2007年04月 - 2009年03月
    北海道大学, 創成科学共同研究機構, 博士研究員
  • 2006年04月 - 2007年03月
    農研機構 畜産草地研究所(つくば), 研究補助員
  • 2005年04月 - 2006年03月
    農研機構 北海道農業研究センター, 特殊研究補助員

学歴

  • 2002年04月 - 2005年09月, 北海道大学, 大学院農学研究科, 生物資源生産学専攻 博士後期課程
  • 2001年04月 - 2002年03月, 北海道大学, 大学院農学研究科, 生物資源生産学専攻 博士前期課程
  • 1996年04月 - 2000年03月, 北海道大学, 農学部, 畜産科学科
  • 1994年04月 - 1996年03月, 私立 京都大谷高等学校

委員歴

  • 2023年04月 - 現在
    生乳取扱者技術認定講習会運営委員会, 委員長
  • 2023年04月 - 現在
    北海道畜産草地学会, 庶務幹事
  • 2023年04月 - 現在
    日本酪農科学会, 評議員
  • 2016年04月 - 2021年03月
    北海道畜産草地学会, 編集委員
  • 2016年04月 - 2020年03月
    北海道畜産草地学会, 監事, 学協会
  • 2012年04月 - 2014年03月
    北海道畜産草地学会, 会計幹事, 学協会
  • 2010年04月 - 2012年12月
    北海道家畜管理研究会, 会計幹事, 学協会

■研究活動情報

論文

  • Application of glucose to prepare Aspergillus oryzae koji as an adjunct to prevent rancidity in cheese products.
    Napaporn Chintagavongse, Tomohiro Mitani, Koichi Tamano, Toru Hayakawa, Jun-Ichi Wakamatsu, Haruto Kumura
    Bioscience, biotechnology, and biochemistry, 2024年11月28日, [国際誌]
    英語, 研究論文(学術雑誌), Koji made using Aspergillus oryzae shows potential for application as a cheese adjunct; however, flavor defects resulting from volatile free fatty acid (FFA) accumulation should be avoided. Hence, a modified glucose-containing whey solid medium was used to culture A. oryzae AHU 7139, and the triacylglycerol (TG) lipase activity and lipase gene (tglA and mdlB) expression were compared with those of a culture using a conventional whey solid medium. The results showed that TG lipase activity and the expression of both lipase genes were reduced in the modified medium. Moreover, the expression level of farA, a positive transcription factor of the lipase genes, was also reduced. The cheese adjunct prepared by culturing the AHU 7139 strain in the modified medium lowered the FFA content in the cheese products, resulting in comparable FFA levels with those in the adjunct-free cheese. Thus, adding glucose is recommended to prepare the koji adjunct for cheesemaking.
  • APPLICABILITY OF VITAL DATA COLLECTED FROM A NON-CONTACT SENSOR FOR ESTIMATING AN INDIVIDUAL COW’S METHANE EMISSION WITH A LASER METHANE DETECTOR
    Samuel Kinari SAGA, Shiho ISHIKAWA, Tomohiro MITANI, Shigeru MORITA, Ryoichi HARA, Takayuki TANAKA, Michio KOMIYA, Kazuei ISHII, Satoru OCHIAI, Geun-Yong HAM
    Journal of JSCE, 11, 2, 1, 9, Japan Society of Civil Engineers, 2023年, [査読有り]
    英語, 研究論文(学術雑誌)
  • A study of lipolysis induced by adjuncts from edible Aspergillus sp. solid culture products on ripened semi-hard cheese.
    Napaporn Chintagavongse, Hayate Takiguchi, Chi Ming-Hsuan, Koichi Tamano, Toru Hayakawa, Jun-Ichi Wakamatsu, Tomohiro Mitani, Haruto Kumura
    Journal of the science of food and agriculture, 2022年01月23日, [査読有り], [国際誌]
    英語, 研究論文(学術雑誌), BACKGROUND: Aspergillus sp. has been used in traditional Japanese fermented foods. Protease-containing culture products of A. oryzae have been applied as the adjunct enzyme source to enrich the flavor in ripened cheese. Although proteolysis was stimulated, the increase of free fatty acids (FFA) was recognized in some products. Since an excess amount of FFA accumulation can cause rancidity in cheese products, the assessment of lipase activity was considered to be essential for the cheese adjunct preparation. RESULTS: Although an equal lipase activity from the adjunct materials of A. kawachii NBRC 4308, A. luchuensis RIB 2604 and A. oryzae AHU 7139 was applied to semi-hard cheese, the FFA level was significantly higher in A. oryzae cheese than in the others. Furthermore, the profiles of volatile components were different in experimental cheeses. An in vitro study with experimental curds demonstrated that the high FFA might not depend on the lipase retainability on curds. On the contrary, the pronounced activation of the lipases occurred in A. oryzae after incubation with the curds. Moreover, incubation of the insoluble lipase that had been attached to the cells with skim milk curd extracts allowed the release of lipases from the cells into the medium with remarkable activation. CONCLUSION: A. oryzae AHU 7139 possessed a complex lipolytic system comprising extracellular and cell-binding lipases that were attributed to the increase in FFA in A. oryzae cheese. © 2022 Society of Chemical Industry.
  • Application of MinION Amplicon Sequencing to Buccal Swab Samples for Improving Resolution and Throughput of Rumen Microbiota Analysis.
    Hiroto Miura, Masayuki Takeda, Megumi Yamaguchi, Yoshihisa Ohtani, Go Endo, Yasuhisa Masuda, Kaede Ito, Yoshio Nagura, Kunihiro Iwashita, Tomohiro Mitani, Yutaka Suzuki, Yasuo Kobayashi, Satoshi Koike
    Frontiers in microbiology, 13, 783058, 783058, 2022年, [査読有り], [国際誌]
    英語, 研究論文(学術雑誌), The Illumina MiSeq platform has been widely used as a standard method for studying the rumen microbiota. However, the low resolution of taxonomic identification is the only disadvantage of MiSeq amplicon sequencing, as it targets a part of the 16S rRNA gene. In the present study, we performed three experiments to establish a high-resolution and high-throughput rumen microbial profiling approach using a combination of MinION platform and buccal swab sample, which is a proxy for rumen contents. In experiment 1, rumen contents and buccal swab samples were collected simultaneously from cannulated cattle (n = 6) and used for microbiota analysis using three different analytical workflows: amplicon sequencing of the V3-V4 region of the 16S rRNA gene using MiSeq and amplicon sequencing of near full-length 16S rRNA gene using MinION or PacBio Sequel II. All reads derived from the MinION and PacBio platforms were classified at the species-level. In experiment 2, rumen fluid samples were collected from beef cattle (n = 28) and used for 16S rRNA gene amplicon sequencing using the MinION platform to evaluate this sequencing platform for rumen microbiota analysis. We confirmed that the MinION platform allowed species-level taxa assignment for the predominant bacterial groups, which were previously identified at the family- and genus-level using the MiSeq platform. In experiment 3, buccal swab samples were collected from beef cattle (n = 30) and used for 16S rRNA gene amplicon sequencing using the MinION platform to validate the applicability of a combination of the MinION platform and buccal swab samples for rumen microbiota analysis. The distribution of predominant bacterial taxa in the buccal swab samples was similar to that in the rumen samples observed in experiment 2. Based on these results, we concluded that the combination of the MinION platform and buccal swab samples may be potentially applied for rumen microbial analysis in large-scale studies.
  • Cow Milk Progesterone Concentration Assessment during Milking Using Near-infrared Spectroscopy
    Patricia IWEKA, Shuso KAWAMURA, Tomohiro MITANI, Takashi KAWAGUCHI, Shigenobu KOSEKI
    Engineering in Agriculture, Environment and Food, 14, 1, 30, 36, Asian Agricultural and Biological Engineering Association, 2021年, [査読有り]
    研究論文(学術雑誌)
  • Effects of grazing adaptation on herbage intake, milk production, and body weight change in lactating dairy cows after turning out to pasture in early spring
    Mitani, T, Nakajima, S, Oh, S, Kawai, M, Ueda, K
    Animal Science Journal, 92, 1, e13639, 2021年, [査読有り], [筆頭著者, 責任著者], [国際誌]
    英語, 研究論文(学術雑誌), The present study investigated the effects of adaptation to grazing in early spring on the herbage intake, milk production, and body weight changes in lactating dairy cows. The experiment included 12 Holstein lactating cows during early spring. Six cows were allowed to gradually adapt to grazing (ADP) over 10 days. They were allowed to graze on a pasture for 4 h during the first week and for 19 h during the remaining 3 days (adaptation period). During the 10-day period, the remaining six cows were housed in a barn (CON). Cows in both groups received adequate silage, hay, and concentrate during the adaptation period. Subsequently, cows in both groups were allowed to graze together for 19 h for 4 weeks (experimental period). No cow received supplements during the experimental period. In the first week of the experimental period, the ADP cows showed a higher herbage intake than the CON cows. During the subsequent weeks, there were no differences in herbage intake between the two groups. At the start of the experimental period, milk production and body weight of the ADP cows were higher than those of the CON cows, and this difference lasted until the end of the experiment.
  • Regional differences in the fatty acid composition, and vitamin and carotenoid concentrations in farm bulk milk in Hokkaido, Japan.
    Mitani, T, Kobayashi, K, Ueda, K, Kondo, S
    Animal Science Journal, 92, 1, e13570, 2021年, [査読有り], [筆頭著者, 責任著者], [国際誌]
    英語, 研究論文(学術雑誌), In this study, we investigated the regional differences in the composition of farm bulk milk produced at three different dairy areas in Hokkaido, Japan. A field survey was conducted at Central, Tokachi, and North areas of Hokkaido, three or four times a year. At each farm, an interview questionnaire for farm basal data was conducted, and 500 ml of bulk tank milk sample was obtained. Fatty acid composition, and vitamin and carotenoid concentrations in the milk samples were determined. In Central and Tokachi areas, corn silage was used as the main forage. In North area, fresh herbage was the dominant feed in the summer season, and grass hay was the main feed in the winter season. Discriminant analysis revealed that the composition of milk samples differed among the areas and seasons. Milk from Central and Tokachi areas contained a higher ratio of linoleic acid compared with that from North area, but there were only slight differences in the composition of milk between Central and Tokachi areas. The concentrations of carotenoids and α-tocopherol were higher in samples from North area and the ratios of trans-vaccenic acid and conjugated linoleic acid were higher in the summer season than in the indoor season.
  • 異なる飼養条件および殺菌条件で生産された牛乳の味認識装置による識別評価
    三谷朋弘, 朝隈貞樹, 上田靖子, 内田健治, 川村周三, 上田宏一郎, 秋山典昭
    ミルクサイエンス(Web), 70, 1, 14, 21, 2021年, [査読有り], [筆頭著者, 責任著者]
    英語
  • Effects of grazing adaptation on intake, ruminal fermentation, blood metabolites, and body weight change in dairy cows after turning out to pasture in early spring.
    Mitani, T, Kubota, T, Mizuguchi, H, Kushibiki, S, Ueda, K
    Animal Science Journal, 91, 1, e13481, 2020年, [査読有り], [筆頭著者, 責任著者], [国際誌]
    英語, 研究論文(学術雑誌), This study investigated the effect of adaptation to grazing in early spring on herbage intake, ruminal fermentation parameters, blood metabolite concentrations, and body weight change in dairy cows. The experiment was conducted on eight rumen-cannulated non-lactating cows in the early spring period. Four cows were adapted to grazing by stocking for 4 hr for 1 week (ADP group). The other cows were kept in a barn during the period (CON group). Then, both groups of cows were stocked together throughout a day on a 1 ha pasture for 3 weeks (experimental period). In the first week of the experimental period, compared to the CON group, the ADP group had a higher herbage intake, ruminal NH3 -N and total VFA concentration, and blood urea concentration, but the NEFA concentration was lower in the ADP group (p < .01). During the subsequent weeks, there were little differences in ruminal fermentation parameters and blood metabolites. Cows in the ADP group maintained their body weight, but cows in the CON group lost 60 kg of body weight in the first week of the experimental period.
  • Effect of summer heat stress on gene expression in bovine uterine endometrial tissues
    Bai, H, Ukita, H, Kawahara, M, Mitani, T, Furukawa, E, Yanagawa, Y, Yabuuchi, N, Kim, H, Takahashi
    Animal Science Journal, 91, 1, e13454, Wiley, 2020年, [査読有り]
    英語, 研究論文(学術雑誌)
  • Effects of ear corn silage supplementation on milk production and milk fatty acid profiles in grazing dairy farms.               
    Mitani, T, Asakuma, S, Shinoda, Y, Ueda, Y, Aoki, Y, Oshita
    Animal Science Journal, 91, e13474, 2020年, [査読有り], [筆頭著者, 責任著者]
    英語, 研究論文(学術雑誌)
  • Non-destructive determination of bovine milk progesterone concentration during milking using near-infrared spectroscopy.               
    Iweka, P, Kawamura, S, Mitani, T, Koseki, S
    Agricultural Engineering International: CIGR Journal, 22, 171, 178, 2020年, [査読有り]
    英語, 研究論文(学術雑誌)
  • 昼夜放牧飼養下におけるサラブレッド種当歳馬の成長に伴う食草行動および自発的運動の変化
    田辺智樹, 田辺智樹, 三谷朋弘, 上田宏一郎, 松井朗, 河合正人
    Animal Behaviour and Management, 56, 2, 55, 62, 2020年, [査読有り]
    英語
  • Online milk quality assessment during milking using near-infrared spectroscopic sensing system
    Patricia Iweka, Shuso Kawamura, Tomohiro Mitani, Takashi Kawaguchi, Shigenobu Koseki
    Environmental Control in Biology, 58, 1, 1, 6, 2020年, [査読有り]
    研究論文(学術雑誌), © 2020 Biotron Institute. All rights reserved. In recent times, there has been an urgent requirement for a technique that can be used by dairy farmers to assess the quality of milk of an individual cow during milking. A near-infrared (NIR) spectroscopic sensing system was designed on an experimental basis for the online assessment of the three major milk constituents (fat, protein, and lactose), solids not fat (SNF), milk urea nitrogen (MUN), and somatic cell count (SCC). This system was used to obtain the NIR spectra of non-homogenized milk during milking over a wavelength range of 700 to 1,050 nm. Calibration models for predicting three major milk constituents, SNF, MUN and SCC of non-homogenized milk were developed, and the precision and accuracy of the models were validated. The coefficients of determination, standard errors of prediction, and bias values showed high levels of precision and accuracy for the prediction of the considered parameters. The results indicated that the developed NIR spectroscopic sensing system can be used to assess milk quality in real-time during milking. This system can provide dairy farmers with information concerning milk quality and physiological condition of each cow, and can therefore optimize dairy farm management.
  • 自動搾乳システムを用いた酪農場での搾乳特性と乳中遊離脂肪酸濃度の関係
    森田 茂, 平松恵, 岡楓子, 三谷朋弘, 熊野康隆, 小板英次郎, 飯田直子
    Animal Behaviour and Management, 55, 1, 1, 7, 2019年03月, [査読有り]
    日本語
  • Cow milk progesterone concentration determination during milking using near-infrared spectroscopy.               
    Iweka, P, Kawamura, S, Mitani, T, Kawaguchi, T, Koseki, S
    Proceedings of International Joint Conference on JSAM, SASJ, and 13th CIGR VI Technical Symposium joining FWFNWG and FSWG Workshops, 2019年
    英語, 研究論文(国際会議プロシーディングス)
  • 乳牛の飼養管理と生乳の品質、風味について
    三谷 朋弘
    乳業技術, 69, 1, 11, 2019年, [招待有り]
    日本語
  • Wall thickness control in biotubes prepared using type-C mold
    Takeshi Terazawa, Takanori Nishimura, Tomohiro Mitani, Osamu Ichii, Teppei Ikeda, Keigo Kosenda, Eisuke Tatsumi, Yasuhide Nakayama
    Journal of Artificial Organs, 21, 3, 1, 5, Springer Tokyo, 2018年03月30日, [査読有り]
    英語, 研究論文(学術雑誌), A type-C mold based on in-body tissue architecture was previously developed for preparing small-diameter biotube vascular grafts with a 2-mm diameter and approximately 1-mm wall thickness. In this study, the type-C mold was modified for preparing large-diameter biotubes with controlled wall thicknesses. Four types of molds were assembled by inserting silicone center rods (outer diameters 11, 13, 15, 17 mm) into stainless steel cages (inner diameter 19 mm) and surgically embedded in the abdominal subcutaneous pouches of Holstein cows. After 8–12 weeks, connective tissues occupied the rod–cage gap in the molds to form biotubes. The wall thickness of the biotubes obtained after removing the molds was approximately 1–3 mm, which corresponded to approximately 80% of each gap distance. The breaking strength almost linearly increased with the wall thickness of the biotubes. The strength of the biotubes with wall thickness over 1.5 mm was higher than that of beagle blood vessels. The thickest biotubes were as strong as bovine pericardium and can be used as an alternative trachea graft because of their adequate lumen-holding force.
  • Timing strategy for concentrate supplementation in grazing dairy cows               
    Ueda, K, Mitani, T
    Proceedings of the 7th Japan-China-Korea Grassland Conference, Japan, 2018年, [招待有り]
    英語, 研究論文(国際会議プロシーディングス)
  • Non-destructive online real-time milk quality determination in a milking robot using near-infrared spectroscopic sensing system               
    Patricia Iweka, Shuso Kawamura, Tomohiro Mitani, Shigenobu Koseki
    Arid Zone Journal of Engineering, Technology and Environment, 18, 121, 128, 2018年, [査読有り]
    英語, 研究論文(学術雑誌)
  • 発酵TMRに含まれるカンショ焼酎粕濃縮液の乳牛への給与が乳生産および生乳の風味に及ぼす影響
    鈴木 知之, 三谷 朋弘, 神谷 裕子, 田中 正仁, 服部 育男, 野中 最子, 佐藤 健次
    日本畜産学会報, 89, 1, 37, 45, 2018年, [査読有り]
    日本語
  • 高乳量水準の酪農場における最短搾乳間隔時間の延長が自動搾乳システムでの牛乳生産量および搾乳特性に及ぼす影響
    森田 茂, 高橋圭二, 三谷朋弘, 熊野康隆, 小板英次郎, 飯田直子
    北海道畜産草地学会報, 6, 35, 39, 2018年, [査読有り]
    日本語
  • 異なる放牧飼養条件および加工処理が牛乳の官能評価特性に及ぼす影響
    朝隈 貞樹, 上田 靖子, 秋山 典昭, 内田 健治, 片野 直哉, 川村 周三, 三谷 朋弘
    ミルクサイエンス, 67, 1, 22, 29, 日本酪農科学会, 2018年, [査読有り]
    日本語, 研究論文(学術雑誌),

    本研究では,放牧牛乳における一般消費者の官能評価を明らかにし,飼養条件および加工処理との関係を検討することを目的とした。飼養条件の異なる4農場の生乳(A, B, Cは放牧,Dは舎飼)を原料とし,ホモジナイズおよび殺菌処理(超高温殺菌ホモジナイズ,高温殺菌ホモジナイズ,高温殺菌ノンホモジナイズ)を3処理区設け,計12種の牛乳を用いて,3回の官能評価試験(計154名)を行った。官能評価試験は,市販牛乳(UHTホモジナイズ)を基準(0)とし,色,香りの強弱,香りの良悪,コク,甘味,後味の強弱および総合評価(おいしさ)の7項目を基準に対する各項目±5段階で評価した。総合評価を除く官能評価6項目を用いた主成分分析から,飼養条件の違い(放牧と非放牧)および加工処理方法の違いにより分けられことが明らかとなった。またプリファレンスマップから,放牧牛乳においてはホモジナイズ処理を行った方が消費者に好まれる可能性が示唆された。今後はこれらの要因となる物質等の検討が必要になる。

  • Effects of the presence of grazing-experienced heifers on the development of foraging behavior at the feeding station scale for first-grazing season calves
    Yuko Shingu, Koichiro Ueda, Shingo Tada, Tomohiro Mitani, Seiji Kondo
    ANIMAL SCIENCE JOURNAL, 88, 8, 1120, 1127, WILEY, 2017年08月, [査読有り]
    英語, 研究論文(学術雑誌), In this study, effects of grazing-experienced heifer presence on foraging behavior development at the feeding station (FS) scale for first-grazing season calves were determined. A group of four calves grazing alone (C), and another comprising four calves (Wc) and three grazing-experienced heifers (Wh), were alternately stocked every day for 2 h on the same pasture for 26 days. The foraging time budget for Wc was significantly longer than that for C (P < 0.05) on day 7, and was similar to that for Wh on all days. Bite rate per FS was significantly higher for Wc (15.5 bite/min) than for C (13.2 bite/min) from day 1 to 14 (33.4 vs. 29.0 bite/min, respectively; P < 0.01) and significantly lower than that for Wh on all days. The number of steps taken between adjacent FSs by Wc (4.7) was significantly lower than that for C (7.2) on days 1 and 14 (2.1 vs. 2.9 steps, respectively; P < 0.01) and was similar to Wh on all days. This suggests that grazing-experienced heifers have positive effects on the foraging behavior development of new-season grazing calves through 14 days after the start of stocking.
  • Skill reading of human social cues by horses (Equus caballus) reared under year-round grazing conditions
    Ryoko Koizumi, Tomohiro Mitani, Koichiro Ueda, Seiji Kondo
    Animal Behaviour and Management, 53, 2, 69, 78, 日本家畜管理学会, 2017年, [査読有り]
    英語, 研究論文(学術雑誌)
  • Effect of timing and type of supplementary grain on herbage intake, nitrogen utilization and milk production in dairy cows grazed on perennial ryegrass pasture from evening to morning
    Koichiro Ueda, Tomohiro Mitani, Seiji Kondo
    ANIMAL SCIENCE JOURNAL, 88, 1, 107, 118, WILEY-BLACKWELL, 2017年01月, [査読有り]
    英語, 研究論文(学術雑誌), The present study aimed to clarify the effect of timing and type of supplementary grain in grazing dairy cows on herbage dry matter intake (HDMI), nitrogen utilization and milk production. Eight lactating cows were allowed to graze from evening to morning during three seasonal periods (spring, summer, autumn). They were randomly allocated to four treatments (timing: pre- (Pre) or post-grazing (Post), for large grain allotments consisting of 75% of daily grain offered; grain type: barley or corn) in 4x4 Latin square designs in each period. In the spring period, HDMI was greater for cows fed corn than those fed barley (P=0.005), whereas cows in the Pre treatment had a similar HDMI, higher (P=0.049) urinary purine derivative concentration and greater (P=0.004) milk yield compared with cows in the Post treatment. In the summer and autumn periods, timing treatments did not affect HDMI, nitrogen utilization or milk production, but cows supplemented with barley had higher urinary purine derivatives concentration (P<0.05) and milk yield (P<0.05) compared with those supplemented with corn. The results indicate that large grain allotments immediately before evening grazing during early grazing seasons increased ruminal microbial protein synthesis and milk production without reducing HDMI regardless of grain type.
  • Effect of increased concentrate allotment before evening grazing on herbage intake, nitrogen utilization and rumen fermentation in dairy cows grazed on perennial ryegrass pasture
    Koichiro Ueda, Tomohiro Mitani, Seiji Kondo
    ANIMAL SCIENCE JOURNAL, 87, 10, 1233, 1243, WILEY, 2016年10月, [査読有り]
    英語, 研究論文(学術雑誌), Two experiments were conducted to elucidate the effect of increased concentrate allotment before evening grazing on herbage intake, nitrogen utilization and rumen fermentation in dairy cows. In experiment 1, nine lactating cows were grazed in the morning and evening sessions (2.5 h each). The cows were allocated to treatments of three concentrate allotment levels before the evening grazing session by altering proportions to daily total offered; 25%, 50% and 75%. Daily herbage dry matter intake quadratically decreased with increasing the concentrate allotment levels (P < 0.05). Nitrogen utilization was similar among treatments. To investigate diurnal changes in rumen fermentation, a second experiment was conducted where six ruminally cannulated non-lactating dairy cows grazed in the morning and evening sessions (3 h each) were subjected to the same treatments as experiment 1. Total volatile fatty acid concentration in the rumen linearly increased with increasing the concentrate allotment levels throughout the pre-evening grazing session to the post-morning grazing session (P < 0.01). The results indicate that dairy cows reduce daily herbage intake but do not alter nitrogen utilization with increasing concentrate allotment before evening grazing.
  • Relationship of rumen fill and fermentation to diurnal and seasonal variation of herbage intake in dairy cows grazed on perennial ryegrass pasture
    Koichiro Ueda, Tomohiro Mitani, Seiji Kondo
    ANIMAL SCIENCE JOURNAL, 87, 9, 1148, 1156, WILEY, 2016年09月, [査読有り]
    英語, 研究論文(学術雑誌), To clarify the effect of digesta weight in the reticulorumen on diurnal and seasonal fluctuations in herbage intake, six ruminally cannulated, non-lactating dairy cows were grazed on perennial ryegrass/white clover pasture during morning and evening sessions in spring and autumn. The digesta weight of fresh matter, dry matter (DM) and fiber in the reticulorumen at the beginning and the end of each grazing session was lower in spring than in autumn (P<0.01). Although the digesta weight was similar between the sessions at the beginning of grazing, it was greater for the evening than for the morning at the end of grazing (P<0.01). The large particles proportion in the digesta was lower for the morning than the evening (P<0.01), and it was lower in spring than in autumn (P<0.01). The concentrations of volatile fatty acids in rumen fluid were generally higher in spring compared with autumn. The herbage DM intake during the evening was greater compared with the morning in both seasons (P<0.01). However, there was no difference in herbage DM intake between seasons. The results showed that the rumen digesta fill was not the sole factor explaining diurnal and seasonal variation of herbage intake in grazing dairy cows.
  • Effect of water-soluble carbohydrate content in orchardgrass pasture on grazing time and rumen fermentation in dairy cows
    Koichiro Ueda, Tomohiro Mitani, Seiji Kondo
    ANIMAL SCIENCE JOURNAL, 87, 9, 1122, 1129, WILEY, 2016年09月, [査読有り]
    英語, 研究論文(学術雑誌), Two experiments were conducted to clarify the effect of water-soluble carbohydrate (WSC) content in orchardgrass pasture on the diurnal distribution of grazing time. Six ruminally cannulated, non-lactating dairy cows were grazed on either of two pastures with different orchardgrass cultivars containing low WSC (LWSC; cultivar: Hokkai 28') or high WSC (HWSC; cultivar: Harunemidori'). The cows were grazed in morning and evening sessions in experiment 1, whereas the cows were grazed throughout the day in experiment 2. In experiment 1, grazing time of the cows on HWSC was longer than that of the cows on LWSC (P < 0.01). This difference was larger in the morning session than in the evening session (pasture x grazing session: P < 0.05). Effects on herbage intake were similar to those on grazing time. In experiment 2, daily total grazing time was longer for the cows on HWSC than for those on LWSC (P < 0.05). The cows on HWSC spent a longer time grazing than those on LWSC in the morning between 03.00 and 09.00 hours (P < 0.01). The results indicated that prolonged grazing time in the period between dawn and early morning could increase daily herbage intake in cows grazed on pastures of orchardgrass cultivars with high-WSC content.
  • Herbage intake and ruminal digestion of dairy cows grazed on perennial ryegrass pasture either in the morning or evening
    Koichiro Ueda, Tomohiro Mitani, Seiji Kondo
    ANIMAL SCIENCE JOURNAL, 87, 8, 997, 1004, WILEY, 2016年08月, [査読有り]
    英語, 研究論文(学術雑誌), This study aimed to clarify diurnal fluctuations of herbage intake, ruminal fermentation of herbage carbohydrates and proteins, and digesta particulate weight in the rumen of grazing dairy cows. Six ruminally cannulated, non-lactating dairy cows were grazed on perennial ryegrass/white clover pasture either in the morning (04.00 to 08.00 hours) or the evening (16.00 to 20.00 hours). Cows grazed in the evening spent more time (P<0.01) and consumed more herbage (P<0.01) compared with cows grazed in the morning. Higher (P<0.05) daily mean concentrations of total volatile fatty acid, propionate and n-butyrate in rumen fluid were observed for cows grazed in the evening compared with cows grazed in the morning. Although cows grazed in the evening ingested more crude protein compared with cows grazed in the morning, no significant difference in NH3-N concentration in rumen fluid was observed between them. The ratio of purine-derivative concentration to creatinine concentrations was higher (P<0.01) in the urine of cows grazed in the evening than in cows grazed in the morning. These results clearly indicated that evening grazing was advantageous for dairy cows compared with morning grazing, in terms of ruminal fermentable energy intake and nitrogen utilization efficiency.
  • Discrimination of “grazing milk” using milk fatty acid profile in the grassland dairy area in Hokkaido
    Mitani T, Kobayashi, K, Ueda, K, Kondo, S
    Animal Science Journal, 87, 2, 233, 241, WILEY-BLACKWELL, 2016年02月, [査読有り], [筆頭著者, 責任著者]
    英語, 研究論文(学術雑誌), Milk produced by the grazing system, referred to as grazing milk contains many components required for human health. The milk fatty acid (FA) profile is strongly associated with the diet on the farms. In the present study, based on the FA profile of farmer's bulk milk, we determined how to discriminate between milk produced on grazing and on a confinement system. A field survey was conducted four times (grazing and confinement season) in the Konsen (29 farms) and Okhotsk (25 farms) area in Hokkaido. Farmer's bulk milk samples and details of feeding management were collected and the FA profile of milk was measured. Milk produced during the grazing season contained less C16:0 and cis-9 C16:0, and more C18:0, cis-9 C18:1, trans-11 C18:1, cis-9,12 C18:2, cis-9,trans-11 C18:2 and cis-9,12,15 C18:3 than milk produced during the confinement season. Discrimination analysis using 16 FA revealed that almost all milk samples were discriminated correctly (confinement season: 90% correct and 10% borderline, grazing season: 88% correct, 9% borderline and 3% incorrect). For farmers that were categorized incorrectly and were considered borderline in the grazing season, the dependency on pasture was low compared with that for farmers correctly discriminated. Therefore, to claim grazing milk, a high dependency on pasture is required for grazing dairy farmers.
  • 北海道和種繁殖母馬のヒト許容距離と子馬のヒト許容距離の関係(日本家畜管理学会・応用動物行動学会2016年度春季合同研究発表会)
    納多 春佳, 河合 正人, 三谷 朋弘, 上田 宏一郎, 近藤 誠司
    日本家畜管理学会誌・応用動物行動学会誌, 52, 1, 54, 54, 日本家畜管理学会, 2016年
    日本語
  • Effect of Cow individuality on accuracy of calibration models using near-infrared spectroscopy for determining milk constituents during milking               
    Iweka, P, Kawamura, S, Morita, A, Mitani, T, Okatani, T, Koseki, S
    Proceedings of the 8th International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB), 2016年
    英語, 研究論文(国際会議プロシーディングス)
  • Regional difference of feeding management and milk composition in Hokkaido, Japan               
    Tomohiro Mitani, Kuniyuki Kobayashi, Tetsushiro Endo, Koichiro Ueda, Seiji Kondo
    Proceedings of the 6th Korea-China-Japan Grassland Conference, 86, 89, 2016年, [招待有り]
    英語, 研究論文(国際会議プロシーディングス)
  • Large-Scale Glycomics of Livestock: Discovery of Highly Sensitive Serum Biomarkers Indicating an Environmental Stress Affecting Immune Responses and Productivity of Holstein Dairy Cows
    Ibrahim F. Rehan, Koichiro Ueda, Tomohiro Mitani, Maho Amano, Hiroshi Hinou, Tetsu Ohashi, Seiji Kondo, Shin-Ichiro Nishimura
    JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 63, 48, 10578, 10590, AMER CHEMICAL SOC, 2015年12月, [査読有り]
    英語, 研究論文(学術雑誌), Because various stresses strongly influence the food productivity of livestock, biomarkers to indicate unmeasurable environmental stress in domestic animals are of increasing importance. Thermal comfort is one of the basic principles of dairy cow welfare that enhances productivity. To discover sensitive biomarkers that monitor such environmental stresses in dairy cows, we herein performed, for the first time, large-scale glycomics on 336 lactating Holstein cow serum samples over 9 months between February and October. Glycoblotting combined with MALDI-TOF/MS and DMB/HPLC allowed for comprehensive glycomics of whole serum glycoproteins. The results obtained revealed seasonal alterations in serum N-glycan levels and their structural characteristics, such as an increase in high-mannose type N-glycans in spring, the occurrence of di/triantennary complex type N-glycans terminating with two or three Neu5Gc residues in summer and autumn, and N-glycans in winter dominantly displaying Neu5Ac. A multivariate analysis revealed a correlation between the serum expression levels of these season-specific glycoforms and productivity.
  • Structure of subgroup in mares and foals in a herd of reproductive horse and formation change of subgroup in weaned foals               
    Sato, F, Tada, S, Mitani, T, Ueda, K, Kondo, S
    Proceedings of the 49th Congress of the International Society for Applied Ethology, 2015年
    英語, 研究論文(国際会議プロシーディングス)
  • Relationship between flight distance of mare and foal to human in Hokkaido native horse.               
    Noda, H, Tada, S, Mitani, T, Ueda, K, Kondo, S
    Proceedings of the 49th Congress of the International Society for Applied Ethology, 2015年
    英語, 研究論文(国際会議プロシーディングス)
  • Effect of substitution of highly-digestible fiber of beet pulp for corn grain starch in concentrate on energy balance and recovery of ovarian function in early lactating dairy cows               
    Bo M, Masaki, T, Nagano, M, Yanagawa, Y, Mitani, T, Ueda, K, Kondo, S
    Hokkaido Journal of Livestock and Grassland Science, 3, 45, 53, 2015年, [査読有り]
    英語, 研究論文(学術雑誌)
  • Long-Term Oral Feeding of Lutein-Fortified Milk Increases Voluntary Running Distance in Rats
    Megumi Matsumoto, Masahito Hagio, Ryo Inoue, Tomohiro Mitani, Masako Yajima, Hiroshi Hara, Takaji Yajima
    PLOS ONE, 9, 4, e93529, PUBLIC LIBRARY SCIENCE, 2014年04月, [査読有り]
    英語, 研究論文(学術雑誌), To evaluate the effects of lutein-fortified milk administration on running exercise, a voluntary wheel-running model was performed in rats. Four-week-old F344 rats were administered test milk (10 mL/kg) daily following a 4-h fasting period, and their running distances were measured each day for a 9-week period. Total weekly running distance significantly increased from the sixth week until the end of the test period in lutein-supplemented rats (lutein-fortified milk administered) compared with control rats (vehicle administered). This increase was not apparent in rats administered lutein alone. In the lutein-fortified-milk exercise group compared with the sedentary control group, carnitine palitroyltransferase 1 (CPT-1), total AMP-activated protein kinase (tAMPK), and phosphorylated AMP-activated protein kinase (pAMPK) contents were significantly increased in the gastrocnemius muscle, with a concomitant decrease in triglyceride and total cholesterol levels in the blood and liver. Furthermore, the lutein level in blood of lutein-administered rats significantly decreased with exercise. These results suggest that lutein-fortified milk may enhance the effect of exercise by effective utilization of lipids when combined with voluntary running.
  • Effects of a proportion of herbage intake and crude protein content of herbage on nitrogen and energy utilization in lactating dairy cows
    Tomohiro Mitani, Koichiro Ueda, Tetsushiro Endo, Makoto Takahashi, Hiroki Nakatsuji, Seiji Kondo
    Hokkaido Journal of Livestock and Grassland Science, 2, 51, 62, 北海道畜産草地学会, 2014年, [査読有り], [筆頭著者, 責任著者]
    英語, 研究論文(学術雑誌)
  • Diversity of dairy farming and milk composition in Japan and Hokkaido               
    Mitani, T
    IDF World Dairy Summit 2013, 2013年, [招待有り]
    英語, 研究論文(国際会議プロシーディングス)
  • Relationship between sensory property and chemical composition of raw milk in different feeding management of Hokkaido in Japan               
    Mitani, T, Katoh, H, Mimuro, A, Ohyama, K, Ueda, K, Kondo, S
    IDF World Dairy Summit 2013, 2013年
    英語, 研究論文(国際会議プロシーディングス)
  • Regional difference of fatty acid, vitamin and β-carotene concentration in milk of Hokkaido in Japan               
    Mitani, T, Kobayashi, K, Ueda. K, Komatsu, Y, Kondo. S
    IDF World Dairy Summit 2012, 2012年
    英語, 研究論文(国際会議プロシーディングス)
  • 草からの牛乳生産の研究
    三谷朋弘
    北海道畜産学会報, 54, 46, 1, 5, 2012年
    日本語
  • Effect of feeding non-fibrous carbohydrate before grazing on intake and nitrogen utilization in dairy cows throughout the grazing season
    Tomohiro Mitani, Koichiro Ueda, Tetsushiro Endo, Makoto Takahashi, Hiroki Nakatsuji, Seiji Kondo
    ANIMAL SCIENCE JOURNAL, 83, 2, 121, 127, WILEY-BLACKWELL, 2012年, [査読有り]
    英語, 研究論文(学術雑誌), Ten lactating cows were used to determine the effect of feeding non-fibrous carbohydrate (NFC) supplement before grazing on feed intake and nitrogen (N) utilization throughout a grazing season. The experiment was conducted from June to September. Cows grazed twice a day (2.5 h x 2) under a set stocking system and were fed NFC supplement (1 kg/4 kg of milk yield) 2 h before grazing (PRE) or immediately after grazing (POST). Cows were also fed a grass and corn silage mixture ad libitum. Herbage dry matter intake (DMI) was greater for PRE than for POST throughout the experiment and decreased from June to September. Conversely, silage DMI was less for PRE than for POST throughout the experiment and increased over the grazing season. Consequently, total DMI for PRE did not differ from that for POST. Milk urea-N concentration and urinary urea-N excretion in June did not differ between the treatments, whereas that after July was higher for PRE than for POST. Proportion of urinary N excretion to absorbed N intake in June was lower for PRE than for POST, but that after July was higher for PRE than for POST. Feeding NFC supplement before grazing would improve N utilization when cows eat large amounts of herbage high in N.
  • 舎飼い飼養から放牧飼養への移行時期における牛乳成分の変動
    三谷朋弘, 佐藤悠二, 上田宏一郎, 高橋 誠, 中辻浩喜, 近藤誠司
    北海道畜産学会報, 53, 29, 34, 2011年, [査読有り]
    日本語, 研究論文(学術雑誌)
  • 尿素およびしょうゆ粕の添加がバレイショでんぷん粕サイレージの発酵品質、栄養価および窒素出納に及ぼす影響
    大下友子, 三谷朋弘, 宮地 慎, 青木康浩, 秋山典昭
    日本草地学会誌, 55, 4, 201, 207, 2010年, [査読有り]
    日本語
  • 乳牛の分娩後黄体機能の回復に対するセレン酵母給与の影響
    鎌田 八郎, 上田 靖子, 三谷 朋弘, 宮地 慎, 安井 喬, 中田 健, 松井 義貴, 村井 勝
    日本畜産学会大会講演要旨集, 111回, 49, 49, (公社)日本畜産学会, 2009年09月
    日本語
  • 泌乳牛の定置放牧および輪換放牧の違いが草地構造,牧草生産量および利用草量に及ぼす影響
    遠藤哲代, 三谷朋弘, 高橋誠, 上田宏一郎, 中辻浩喜, 近藤誠司
    日本草地学会誌, 55, 1, 9, 14, 2009年, [査読有り]
    日本語
  • 農村におけるネットワークの構造と特質               
    小林国之, 三谷朋弘
    日本農業経済学会論文集,2008年度農業経済研究別冊, 137, 144, 2008年, [査読有り]
    日本語, 研究論文(学術雑誌)
  • Differences of lying-standing action and locomotion posture between cows kept on pasture and in cowshed               
    Kondo, S, Takahashi, M, Mitani, T, Kashiwabara, H, Ueda, K, Nakatsuji, H
    Proceedings of the 41st International Congress of the International Society for Applied Ethology, 2007年
    英語, 研究論文(国際会議プロシーディングス)
  • 反芻胃でのタンパク質と炭水化物の分解同期化を考慮した放牧乳牛に対する併給飼料の給与法
    三谷朋弘, 遠藤哲代, 高橋 誠, 上田宏一郎, 中辻浩喜, 近藤誠司
    栄養生理研究会報, 52, 1, 1, 9, 2007年, [査読有り]
    日本語
  • 無添加および乳酸菌添加バレイショでんぷん粕サイレージの発酵特性および消化特性
    大下友子, 三谷朋弘, 宮地 慎, 青木康浩, 秋山典昭
    日本草地学会誌, 53, 3, 201, 207, 2007年, [査読有り]
    日本語
  • Effects of pre-feeding of a corn silage-based supplement on the feed intake, milk production and nitrogen utilization of grazing dairy cows
    Tomohiro Mitani, Makoto Takahashi, Koichiro Ueda, Hiroki Nakatsuji, Seiji Kondo
    Animal Science Journal, 76, 5, 453, 460, 2005年10月, [査読有り]
    英語, 研究論文(学術雑誌), Four Holstein cows were used to determine the effect of timing of the feeding of a corn silage (CS)-based supplement on the feed intake, milk production and nitrogen utilization of grazing dairy cows. The cows were fed the supplement 2 h before grazing (pre-grazing) or immediately after grazing (post-grazing). Cows were grazed for 5 h per day under a rotational grazing system. There was no difference in the herbage and total feed intake between treatments. The milk protein yield for pre-grazing tended to be higher than that for post-grazing, whereas the milk yield did not differ between treatments. The total nitrogen intake for pre-grazing tended to be higher than that for post-grazing (P = 0.06). There was no difference in the urinary nitrogen output between treatments, whereas the proportion of urinary nitrogen output : total nitrogen intake for pre-grazing tended to be lower than that for post-grazing (P = 0.06). The milk nitrogen output and nitrogen retention for pre-grazing tended to be higher than that for post-grazing (milk nitrogen, P = 0.06
    nitrogen retention, P = 0.05). Nitrogen utilization of grazing dairy cows was improved by feeding a CS-based supplement before grazing.
  • Effects of supplementary corn silage on the feed intake and milk production of time-restricted grazing dairy cows
    Tomohiro Mitani, Makoto Takahashi, Koichiro Ueda, Hiroki Nakatsuji, Seiji Kondo, Masahiko Okubo
    Animal Science Journal, 76, 4, 331, 337, 2005年08月, [査読有り]
    英語, 研究論文(学術雑誌), The effects of supplementary corn silage (CS) of either 2 or 4 kg of dry matter (DM
    S + 2 and S + 4, respectively) above the energy requirement for milk production and maintenance for grazing dairy cows (S) were determined. Time-restricted grazing was used to compare the feed intake, milk production, and nitrogen and energy use of lactating cows. The experiment was carried out on two different pastures using a 3 × 3 Latin square design for each pasture. Cows were grazed for 5 h on a rotational grazing system and were fed concentrate (1 kg per 5 kg of milk yield). Herbage intake was measured using a weighing technique. To calculate the energy and nitrogen use, whole feces and urine were collected. There was no statistical effect of the pastures. Herbage intake decreased by the addition of CS (P= 0.02). The reduction of herbage DM intake per unit consumption of supplementary CS towards the S group were 0.80 and 0.45 kg for the S + 2 and S + 4 groups, respectively. The total DM intake for the S + 4 group was higher than that for the S and S + 2 groups (P = 0.02). Milk yield did not differ among treatments, even though the total DM intake for the S + 4 group was higher than that of the S and S + 2 groups. Nitrogen and energy use did not differ with the addition of CS.
  • 「泌乳牛の放牧飼養時における反芻胃内でのタンパク質と炭水化物分解の同期化に関する研究               
    三谷 朋弘
    2005年
    日本語, 学位論文(博士)
  • The effect of stocking rate and initial grass height on herbage production and utilization, and milk production per unit area under set stocking by lactating dairy cows
    H. Nakatsuji, Endo, T, Bawm, S, Mitani, T, Ueda K, Kondo, S
    Proceedings of a satellite workshop of the XXth International Grassland Congress, 240, 2005年
    英語, 研究論文(国際会議プロシーディングス)
  • Effect of pre-grazing feeding of a non-fibrous carbohydrate on feed intake, milk production and nitrogen utilization               
    Proceedings of the 13th Asian Diary Conference
    Tomohiro Mitani, Junki Honma, Tetsushiro Endo, Koichiro Ueda, Hiroki Nakatsuji, Seiji Kondo, 31, 37, 2005年
    英語, 研究論文(国際会議プロシーディングス)
  • 泌乳牛のコーンサイレージ主体飼養下におけるルーメン内分解性蛋白質含量の異なる濃厚飼料の給与が乳生産、窒素およびエネルギー出納に及ぼす影響
    中辻浩喜, 竹井 悠, 三谷朋弘, 近藤誠司, 大久保正彦
    北海道大学大学院農学研究科邦文紀要, 24, 3-4, 381, 388, 2005年, [査読有り]
    日本語
  • Effect of timing to feed corn silage-based supplement for grazing dairy cows on intake, milk production and nitrogen utilization.               
    Mitani, T, Takahashi, M, Ueda, K, Nakatsuji, H, Kondo, S
    55th Annual Meeting of the European Association for Animal Production, 2004年
    英語, 研究論文(国際会議プロシーディングス)
  • Herbage production and utilization, and milk production per unit area under set stocking and rotational grazing by lactating dairy cows
    NAKATSUJI H
    Proceedings of the 11th Asia-Australasian Animal Production (AAAP) Congress, 2004, 517, 519, 2004年
    英語, 研究論文(国際会議プロシーディングス)
  • Effect of different concentrate supplementation on milk production, rumen fermentation, nitrogen and energy balance in grazing dairy cows               
    Nakatsuji, H, Takei, Y, Mitani, T, Kondo, S, Okubo, M
    26th IDF World Dairy Congress, 2002年
    英語, 研究論文(国際会議プロシーディングス)
  • Effect of corn silage supplementation on intake, milk production, energy and nitrogen balance in grazing dairy cows               
    Mitani, T, Nakatsuji, H, Kondo S, Okubo, M
    26th IDF World Dairy Congress, 2002年
    英語, 研究論文(国際会議プロシーディングス)

その他活動・業績

書籍等出版物

  • 乳肉卵の機能と利用 新版               
    三谷朋弘, 2章 乳の科学, Section 1 乳脂肪の合成と性質,分析法
    アイ・ケイ・コーポレーション, 2018年, [分担執筆]
  • 日本飼養標準 乳牛(2017年版)               
    三谷朋弘, 5.3 乳成分に及ぼす給与飼料の影響
    国立研究法人 農業・食品産業技術総合研究機構 編, 2017年, [分担執筆]
  • Milk book ~とっておきレシピ&牛乳のお話               
    三谷朋弘
    北海道新聞社, 2011年, [分担執筆]
  • 酪農大辞典               
    三谷朋弘, 生理・飼育技術・環境管理
    農文協, 2011年, [分担執筆]
  • 最新農業技術 畜産 vol.3               
    三谷朋弘, 牛乳の脂肪酸組成-舎飼いと放牧での比較
    農文協, 2010年, [分担執筆]

講演・口頭発表等

  • 「生乳の風味異常における発生メカニズムと防止対策」               
    三谷 朋弘
    令和3年度 北海道農業団体生乳検査技術研究会 研修会, 2021年06月28日
    [招待講演]
  • 「より良い風味の牛乳の生産に向けて -酪農現場における自発性酸化臭発生メカニズムの解明-」               
    三谷 朋弘, 森田 茂
    生乳の風味に関する研究事業報告説明会, 2021年06月08日
    2021年06月08日 - 2021年06月08日, [招待講演]
  • 「酪農生産現場における自発性酸化臭発生メカニズムとその要因について」               
    三谷 朋弘
    令和2年度生乳検査技術者連絡会, 2021年02月24日
    [招待講演]
  • 「生乳の異常風味改善」               
    三谷 朋弘
    令和元年度経営体育成対策事業酪農ゼミナール, 2020年02月18日
    [招待講演]
  • 「乳中の脂肪酸組成 -その生成メカニズムと飼料との関連-」               
    三谷 朋弘
    令和元年度生乳検査技術者連絡会, 2020年01月29日
    [招待講演]
  • 北海道における乳牛飼養最前線               
    三谷朋弘
    北海道畜産草地学会第8回大会シンポジウム「温故知新~北海道の酪農畜産の持続的発展を目指して~」, 2019年08月25日
    [招待講演]
  • 「生乳の風味変化について -特に、自発性酸化臭について-」               
    三谷朋弘
    令和元年度第1回生乳の安全・安心の確保のための指定団体担当者会議, 2019年07月12日
    [招待講演]
  • 生乳の風味変化に関わる成分分析 -特に、乳脂肪に関わる成分について-               
    三谷朋弘
    平成30年度生乳検査技術者連絡会, 2019年02月
    [招待講演]
  • 生乳の風味変化について -特に、自発性酸化臭について-               
    三谷朋弘
    令和元年度 安全・安心の確保のための指定団体担当者会議, 2019年
    [招待講演]
  • 生乳の風味異常について               
    三谷朋弘, 森田 茂
    Jミルク 生乳の異常風味研修会, 2019年
    [招待講演]
  • 生乳の風味変化について -その発生メカニズムと要因について-               
    三谷朋弘
    平成30年度 全国生乳検査技術研修会, 2018年10月
    [招待講演]
  • 国産飼料100%による牛乳生産に向けて -放牧牛に対するイアコーンサイレージの給与事例-               
    三谷朋弘
    NON-GMO生乳生産者・よつ葉共同購入グループ 2017年度 産地交流会, 2018年01月
    [招待講演]
  • 牛乳から見える文化               
    三谷朋弘
    2016 北海道放牧酪農ネットワーク交流会in足寄, 2016年08月30日
    [招待講演]
  • Regional difference of feeding management and milk composition in Hokkaido, Japan               
    Tomohiro MITANI
    The 6th Korea-China-Japan Grassland Conference, 2016年08月
    [招待講演]
  • Diversity of dairy farming and milk composition in Japan and Hokkaido               
    三谷朋弘
    IDF World Dairy Summit 2013, 2013年10月
    [招待講演]
  • 草からの牛乳生産の研究               
    三谷朋弘
    北海道畜産学会・北海道草地研究会・北海道家畜管理研究会合同シンポジウム, 2011年12月, 口頭発表(基調)
    [招待講演]
  • Relationship between feeding system and milk characteristics in Hokkaido Region of Japan               
    三谷朋弘
    The 14th SNU-HU Joint Symposium, 2011年11月
    [招待講演]
  • 北海道における飼養方法の違いと牛乳の特徴について               
    三谷朋弘
    平成23年度第1回地域交流牧場全国連絡会北海道ブロック, 2011年07月14日
    [招待講演]
  • 高付加価値化牛乳の要件               
    三谷朋弘
    「放牧牛乳のプレミアム化に向けた家畜健全性指標の確立と牛乳中機能性成分制御技術の開発」研究成果発表会, 2010年03月
    [招待講演]
  • 反芻胃でのタンパク質と炭水化物の分解同期化を考慮した放牧乳牛に対する併給飼料の給与法               
    三谷朋弘, 遠藤哲代, 高橋 誠, 上田宏一郎, 中辻浩喜, 近藤誠司
    家畜栄養生理研究会春季集談会, 2008年03月
    [招待講演]
  • Effect of pre-grazing feeding of a non-fibrous carbohydrate on feed intake, milk production and nitrogen utilization               
    T. Mitani, J. Honma, T. Endo, K. Ueda, H. Nakatsuji, S. Kondo
    The 13th Asian Diary Conference, 2005年10月
    [招待講演]

所属学協会

  • 2019年12月
    日本酪農科学会               
  • 北海道畜産草地学会               
  • 動物の行動と管理学会               
  • 日本草地学会               
  • 日本畜産学会               

共同研究・競争的資金等の研究課題

  • 酪農家飼養環境とバルク乳成分調査事業               
    2021年04月 - 2024年03月
    三谷 朋弘, 森田 茂, 小林 国之, 朝隈 貞樹, 上田 靖子, 篠田 優香, 福澤 萌
    日本中央競馬会畜産振興事業, 研究代表者
  • 異なる飼養条件下で生産された牛乳の風味および品質特性               
    ミルクサイエンス研究助成金
    2020年04月 - 2022年03月
    三谷 朋弘, 朝隈 貞樹, 上田 靖子, 篠田 優香
    日本酪農科学会, 北海道大学, 研究代表者
  • 牧草サイレージの高品質化に向けたバイオガスプラント消化液施用量の評価               
    令和2年度研究助成
    2020年04月 - 2021年03月
    三谷 朋弘
    伊藤記念財団, 北海道大学, 研究代表者
  • 次世代閉鎖型搾乳牛舎とロボット、ICTによる省力化スマート酪農生産の実証 「搾乳作業の自動化の検証と個体別牛乳の品質分析装置の開発」               
    国立研究開発法人農業・食品産業技術総合研究機構委託事業「スマート農業技術の開発・実証プロジェクト」及び「スマート農業加速化実証プロジェクト」
    2019年04月 - 2021年03月
    三谷朋弘, 川村 周三
    国立研究開発法人農業・食品産業技術総合研究機構, 研究分担者, 競争的資金
  • 生乳の異常風味発生に対する対策事業               
    日本中央競馬会畜産振興事業
    2018年04月 - 2021年03月
    三谷朋弘, 福澤 萌, 森田 茂
    日本中央競馬会, 研究代表者, 競争的資金
  • 道産トウモロコシの安定供給に基づく高付加価値畜産物生産技術の開発 「道産飼料100%でのおいしい牛乳生産技術の開発」               
    「革新的技術開発・緊急展開事業(うち経営体強化プロジェクト)」
    2017年04月 - 2020年03月
    三谷朋弘
    国立研究開発法人農業・食品産業技術総合研究機構生物系特定産業技術研究支援センター, 研究分担者, 競争的資金
  • 放牧牛乳・乳製品の特性を活かした高付加価値技術の開発 ①味覚センサ等による放牧牛乳の特徴付け               
    平成23年度農林水産省委託プロジェクト研究「自給飼料多給による高付加価値牛肉・牛乳生産技術の開発」
    2010年 - 2012年
    三谷朋弘
    農林水産省, 研究分担者, 競争的資金
  • 自動追尾方式を利用した移動体認識・解析システムによる放牧牛の行動解析
    科学研究費助成事業
    2009年 - 2011年
    中辻 浩喜, 近藤 誠司, 上田 宏一郎, 三谷 朋弘
    放牧地に高解像度ネットワークカメラを設置して牛の行動を連続的に撮影して、そのデジタル画像を無線LANで基地パソコンに送信し、自動画像処理により牛の移動軌跡のリアルタイムでの把握を試みた。試行錯誤の結果、カメラの設置状況によってはカメラ画像から位置データを同定できる可能性が示唆された。このようなシステム構築の可能性は示唆されたが、カメラ台数および基地パソコンでの画像統合処理等の精度向上については今後の課題である。
    日本学術振興会, 基盤研究(C), 21580321
  • 生乳の脂質酸化に及ぼす要因解析とその防止策の検討
    科研費 若手研究(B)
    2009年 - 2011年
    三谷朋弘
    牛乳で脂質が酸化する事による品質の劣化が問題となっている。本研究では、長期冷蔵保存下での脂質酸化のメカニズムを明らかにし、その生乳段階での乳成分との関連を検討した。脂質酸化の最終段階で発生する物質(ヘキサナール)は過酸化脂質を経て生成され、その経過は脂肪酸組成の影響を強く受けた。不飽和度の高い脂肪酸(リノレン酸)を多く含む生乳は早い段階でヘキサナールの生成が確認され、リノール酸を多く含む生乳はある程度経過してからヘキサナールが生成された。生乳中の脂肪酸組成は飼料構成の影響を強く受けるため、今後は飼養条件や生乳成分の違いによる生乳の用途・流通を考慮する必要があるだろう。
    日本学術振興会, 若手研究(B), 北海道大学, 研究代表者, 競争的資金, 21780241

産業財産権

  • 乳牛の飼養内容の予測方法、乳牛の飼料の選定方法、生乳の品質の制御方法               
    特許権, 大山孝治, 斉藤瑞恵, 三室明寛, 三谷朋弘
    特願2013-224038, 2013年10月29日
    特開2015-084677, 2015年05月07日
  • 「身体活動促進剤」―ルテインを強化した乳とその有効成分を含むものー               
    特許権, 松本 恵, 矢島昌子, 三谷朋弘, 原 博, 矢島髙二
    特願2009-216482, 2009年09月18日
    特開2011-063552, 2011年03月31日

担当教育組織