Application of different amendments to optimize nitrogen management in sweet corn ( Zea mays L.) with winter cover crops in Hokkaido, Japan
Kotaro Saito, Taiken Nakashima, Toshiyuki Hirata
Plant Production Science, 12 Jan. 2026
Scientific journal

Nitrogen Accumulation and Initial Growth Response in Lettuce Planted at Different Periods After Hairy Vetch Incorporation
Hiroshi Uchibayashi, Takuro Shinano, Toshiyuki Hirata
International Journal of Plant Biology, 12 Nov. 2024, [Peer-reviewed], [Invited], [Corresponding author]
Scientific journal, 36899151

Regulation of the growth of sprouting roots of black locust seedlings using root barrier panels
Satoshi Kitaoka, Shiro Matsunami, Yannan Wang, Saki Fujita, Kobayashi Makoto, Toshiyuki Hirata, Takayoshi Koike
Journal of Forestry Research, 34, open acess, 655, 664, Springer Science and Business Media LLC, Apr. 2023, [Peer-reviewed], [International Magazine]
Scientific journal, Abstract

How can we regulate an invasive alien species of high commercial value? Black locust (Robinia pseudoacacia L.) has a unique capacity for seed dispersal and high germination. Field surveys indicate that black locust increases its growing area with sprouting roots and the elongation of horizontal roots at a soil depth of 10 cm. Therefore, a method to regulate the development of horizontal roots could be effective in slowing the invasiveness of black locust. In this study, root barrier panels were tested to inhibit the growth of horizontal roots. Since it is labor intensive to observe the growth of roots in the field, it was investigated in a nursery setting. The decrease in secondary flush, an increase in yellowed leaflets, and the height in the seedlings were measured. Installing root barrier panels to a depth of 30 cm effectively inhibit the growth of horizontal roots of young black locust.

Regulating the growth black locust seedlings by inhibiting the sprouting roots; An examination of effectiveness of root-growth regulation plates
Shiro Matsunami, Satoshi Kitaoka, Takayoshi Koike, Toshiyuki Hirata, Vitas Marozas, Fuyuki Satoh
Eurasian Journal of Forests Research, 22, 33, 38, Apr. 2022, [Peer-reviewed], [Invited]
English, Research institution

Site-directed mutagenesis by biolistic transformation efficiently generates inheritable mutations in a targeted locus in soybean somatic embryos and transgene-free descendants in the T-1 generation
Kohei Adachi, Aya Hirose, Yuhei Kanazashi, Miki Hibara, Toshiyuki Hirata, Masafumi Mikami, Masaki Endo, Sakiko Hirose, Nobuyuki Maruyama, Masao Ishimoto, Jun Abe, Tetsuya Yamada
TRANSGENIC RESEARCH, 30, 1, 77, 89, Feb. 2021, [Peer-reviewed]
English, Scientific journal

Soil carbon and nitrogen and tomato yield response to cover crop management
Rafael A. Muchanga, Toshiyuki Hirata, Yoshitaka Uchida, Ryusuke Hatano, Hajime Araki
AGRONOMY JOURNAL, 112, 3, 1636, 1648, May 2020, [Peer-reviewed]
English, Scientific journal

Dynamics of N Derived from N-15-labeled Rye in Soil-tomato System as Influenced by Cover Crop Residue Management
Rafael A. Muchanga, Yoshitaka Uchida, Toshiyuki Hirata, Ryusuke Hatano, Hajime Araki
HORTICULTURE JOURNAL, 89, 4, 394, 402, 2020, [Peer-reviewed]
English, Scientific journal

Hairy Vetch and Livestock Compost Improve Soil Carbon and Nitrogen, and Fresh-market Tomato Yield
Rafael A. Muchanga, Toshiyuki Hirata, Hajime Araki
HORTSCIENCE, 54, 6, 1023, 1030, Jun. 2019, [Peer-reviewed]
English, Scientific journal

Dynamics of nitrogen derived from hairy vetch applied as cover crop in tomato production in plastic house
Y. Sugihara, H. Ueno, T. Hirata, M. Komatsuzaki, H. Araki
Acta Horticulturae, 1164, 135, 142, 30 Jun. 2017, [Peer-reviewed]

Reduction in Nitrogen Fertilizer Application by Introduction of Hairy Vetch Cultivation in Two Cropping Systems of Spring Wheat in Central Hokkaido
Toshiyuki Hirata, Daisuke Noguchi, Hajime Araki
Japanese Journal of Farm Work Research, 52, 3, 133, 142, Japanese Society of Farm Work Research, 2017, [Peer-reviewed], [Lead author]
Japanese, This study examined how hairy vetch seeding affects reduction of nitrogen (N) fertilizer application to the continuous cropping of spring wheat in Central Hokkaido, in 2015 and 2016. The spring wheat cultivar, ‘Haruyutaka’, was cultivated using two cropping systems, namely, a conventional system wherein spring wheat was sown in early April and an early winter seeding system wherein spring wheat was sown just before snowfall. Hairy vetch was grown until just before the spring wheat seeding was completed in the conventional system. In contrast, in the early winter seeding system, hairy vetch was incorporated in late October. N fertilizer application after snow melting was reduced to half the recommended level in the cropping systems employing hairy vetch. Growth and dry matter production in spring wheat were estimated in 2015 and 2016, by comparatively evaluating these results with the conventional and the early winter seeding systems without hairy vetch application. Dry weight of hairy vetch ranged from 250.1 g m^-2 in the conventional system in 2014 to 50.1 g m^-2 in the early winter seeding system in 2015. The grain dry matter weight was higher in the early winter seeding system in only 2015, but there was no difference between hairy vetch application treatments in both systems in 2015 and 2016. N content in wheat grain ranged from 2.29% to 2.52%, which was sufficient to ensure seed quality of spring wheat. The plant length was suppressed at the late growth stage in the early winter seeding system employing hairy vetch in 2016. This results suggest that N deficiency occurred at the ripening stage of wheat in this system. The present study shows the potential to reduce spring N fertilizer to half of the recommended level by introduction of hairy vetch during the previous autumn season., 10336155

Hairy Vetch Becomes an Alternative Basal N Fertilizer in Low-input Fresh-market Tomato Production in a Plastic High Tunnel
Rafael Alexandre Muchanga, Toshiyuki Hirata, Hajime Araki
HORTICULTURE JOURNAL, 86, 4, 493, 500, 2017, [Peer-reviewed]
English, Scientific journal

Contribution of N Derived from a Hairy Vetch Incorporated in the Previous Year to Tomato N Uptake under Hairy Vetch-tomato Rotational Cropping System
Yuichi Sugihara, Hideto Ueno, Toshiyuki Hirata, Masakazu Komatsuzaki, Hajime Araki
HORTICULTURE JOURNAL, 85, 3, 217, 223, 2016, [Peer-reviewed]
English, Scientific journal

Hairy Vetch Derived-N Uptake by Tomato Grown in a Pot Containing Fast- and Slow-release N Fertilizer
Yuichi Sugihara, Hideto Ueno, Toshiyuki Hirata, Hajime Araki
JOURNAL OF THE JAPANESE SOCIETY FOR HORTICULTURAL SCIENCE, 83, 3, 222, 228, Jul. 2014, [Peer-reviewed]
English, Scientific journal

Tillage and cover crop species affect soil organic carbon in Andosol, Kanto, Japan
Tatsuya Higashi, Mu Yunghui, Masakazu Komatsuzaki, Shigenori Miura, Toshiyuki Hirata, Hajime Araki, Nobuhiro Kaneko, Hiroyuki Ohta
SOIL & TILLAGE RESEARCH, 138, 64, 72, May 2014, [Peer-reviewed]
English, Scientific journal

Uptake and Distribution of Nitrogen Derived from Hairy Vetch Used as a Cover Crop by Tomato Plant
Yuichi Sugihara, Hideto Ueno, Toshiyuki Hirata, Hajime Araki
JOURNAL OF THE JAPANESE SOCIETY FOR HORTICULTURAL SCIENCE, 82, 1, 30, 38, Jan. 2013, [Peer-reviewed]
English, Scientific journal

Biomass production and nitrogen absorption in the rotational croppings of spring wheat and cover crops in Hokkaido
Toshiyuki HIRATA, Takeshi NAGAYAMA, Hajime ARAKI
Japanese Journal of Farm Work Research, 47, 4, 127, 137, Japanese Society of Farm Work Research, 2012, [Peer-reviewed], [Lead author]
Japanese, Cover crops have been used for maintenance of soil quality in wheat production systems for many years. Examined were biomass accumulation and nitrogen absorption in wheat production of four annual rotational croppings ; spring wheat and bare fallow, hairy vetch, bristle oat, and mixture of hairy vetch and bristle oat, in Hokkaido, with its cool season and snow cover region. The overview of results is as follows. 1) The yields of wheat were increased by cover croppings. It was not influenced by the species of cover crops used. 2) Yield of wheat in 2009 was 55.4% of that in 2008 in the bare fallow plot, while reduction rates of wheat yields from 2008 to 2009 were 36.7% and less in the plots where cover crops were produced. It was suggested that the yield stability of wheat was increased by rotational managements of cover crops. 3) From multiple linear regression analysis with nine explanatory variables ; three candidate nitrogen resources and their C/N ratio, two cover crop species and a tillage method, bristle oat production was found to have a negative effect on the nitrogen absorption of wheat. This result showed the effectiveness of hairy vetch cropping in the rotational production of spring wheat and cover crops. 4) The effect of spring tillage on wheat yield was not detected among cover crops. Nontillage seeding of spring wheat may provide an advantage in saving energy in the field in rotational cropping of spring wheat and cover crops., 10336155

Effects of tillage and winter cover cropping on microbial substrate-induced respiration and soil aggregation in two Japanese fields
Tomomi Nakamoto, Masakazu Komatsuzaki, Toshiyuki Hirata, Hajime Araki
SOIL SCIENCE AND PLANT NUTRITION, 58, 1, 70, 82, 2012, [Peer-reviewed]
English, Scientific journal

Estimating Spatial Distribution of Herb Species and Herbage Mass in Cover Crop Field Using Hyperspectral Imaging
SUZUKI Yumiko, OKAMOTO Hiroshi, HIRATA Toshiyuki, KATAOKA Takashi, SHIBATA Youichi
Japanese journal of farm work research, 45, 2, 99, 109, Japanese Society of Farm Work Research, 2010, [Peer-reviewed]
Japanese, Scientific journal, Cover crops have many benefits such as reducing chemical materials, improving soil condition, preventing soil erosion and conservation of soil water. The long-term objective of this study is to assess and estimate cover crop effectiveness such as green manure, weed depression and soil conservation. In this paper, spatial distribution of herb species and herbage mass was estimated.
A ground based hyperspectral imaging, which is useful for acquiring field information, was employed to monitor the cover crop field (bristle oat and hairy vetch). In order to generate the maps of herbage mass, first, plant portions were extracted from hyperspectral images by NDVI (normalized difference vegetation index) threshold. Next, they were classified into plant species using linear discriminant models. Finally, the herbage mass of each plant species was estimated individually using partial least squares regression model, and mapped with gradient colors depending on the estimated value.
The results show that the success rate of plant area extraction was 100% and the success rate of the plant species classification was 78.7%. With regards to the result of the herbage mass estimation, the model that used both plant pixel spectra and plant cover rate as explanatory variables had the highest and most stable accuracy than the other models. The maps of plant species and herbage mass reflected the actual spatial distribution on the field. It was demonstrated that the hyperspectral imaging system developed in this study is a useful technique for monitoring the cover crop.

Cover crop use in Tomato production in plastic high tunnel　　　　　　　　　　　　　　　
Horticultural environment and biotechnology, 50, 4, 324, 328, 2009, [Peer-reviewed]

Evaluation of nitrogen uptake in processing tomato grown with hairy vetch mulch labeled with N-15
Hajime Araki, Toshiyuki Hirata, Naomi Asagi, Hideo Ueno
HORTSCIENCE, 42, 4, 952, 952, Jul. 2007, [Peer-reviewed]
English

Effects of Cover Cropping and Tillage System on Soil Physical Characters in Upland Rice Cultivation
MU Yinghui, KOMATSUZAKI Masakazu, MORIIZUMI Shoji, GU Song, ARAKI Masaaki, ARAKI Hajime, HIRATA Toshiyuki
Japanese journal of farm work research, 42, 1, 11, 20, 日本農作業学会, 2007, [Peer-reviewed]
Japanese

ハイパースペクトル画像解析を利用したカバークロップ混播区における草種識別　　　　　　　　　　　　　　　
農業機械学会北海道支部会報, 47, 27, 33, 2007, [Peer-reviewed]

Effects of Elevated Atmospheric CO_2 on Forage Yields of Perennial Ryegrass (Lolium perenne L.) and Red Clover (Trifolium pratense L.)
Kobayashi Sohei, Sugiyama Syuichi, Hirata Toshiyuki, Yoshida Koichi, Takahashi Hidenori, Nakashima Hiroshi
Journal of Japanese Society of Grassland Science, 50, 3, 265, 270, Japanese Society of Grassland Science, 15 Aug. 2004, [Peer-reviewed]
English, Atmospheric carbon dioxide (CO_2) concentration (app. 370μmol mol^<-1>) is predicted to double by the end of this century. The objective of this study was to evaluate the effects of elevated atmospheric CO_2 on forage yields of perennial ryegrass and red clover in Hokkaido. The two species were grown as monocultures in a factorial design of two CO_2 concentrations (ambient and doubled) and two nitrogen (N) fertilizer levels (with and without N) using open top chambers at the Hokkaido University Experimental Farm for two years to examine forage yields and the numbers and sizes of tillers and...

Population dynamics and spatial distribution pattern of red clover (Trifolium pratense L.) pure stands under different cutting management
平田 聡之, 森下 浩, 由田 宏一, 中嶋 博
Research bulletin of the University Farm, Hokkaido University, 33, 33, 1, 8, 北海道大学北方生物圏フィールド科学センター耕地圏ステーション生物生産研究農場, 31 Mar. 2003
Japanese, Many studies for improvement of the persistence of red clover population (Trifolium pratense L.) are carried out for extension of the survival period of individuals, or improvement of a physiological function. In this study, we focused on 1) effect of natural seeding to sward production of red clover, and 2) spatial and temporal dynamics of red clover population in small scale. On first cutting time in 1999, many recruitment plants were observed in the late cutting meadow plots. In first cutting time in 2000, their dry matter weight were increased to 50% of parental plants. The parental plants in late cutting plots have higher mortality than standard cutting plots. We suggested that it may be the trade-off between the sustainability of parental plants and recruitment plants production. In red clover pure stand we surveyed, spatial distribution patterns of individuals have been aggregated temporally in small scale.

Does CO_2 Enrichment Directly Affect the Percentage of Dry Matter and Concentrations of Minerals(N, P, K) and ADF in Perennial Ryegrass(Lolium perenne L.) and Red Clover(Trifolium pratense L.)?
KOBAYASHI Sohei, HIRATA Toshiyuki, YOSHIDA Koichi, NAKASHIMA Hiroshi
Journal of Japanese Society of Grassland Science, 47, 4, 370, 377, Japanese Society of Grassland Science, 15 Oct. 2001, [Peer-reviewed]
English, The increase of atmospheric carbon dioxide(CO_2) concentration that will occur in the future may affect the value of feed in two ways : directly by influencing plant physiology (independently of plant size) or indirectly through an increase in plant size(dependently on plant size). In this study, we attempted to clarify the important direct(size-independent) effect of CO_2 enrichment on the feeds of perennial ryegrass and red clover by growing them under ambient and elevated CO_2(about 700ppm) concentrations for two years at the Experiment Farms, Hokkaido University. Carbon dioxide enrichme...

Adaptation of three crops, Amaranthus (Amaranthus hypochondriacus), Quinoa (Chenopodium quinoa) and Lupinus spp. (L. angustifolius, L. luteus, L. albus) in Hokkaido, Japan.
平田聡之, 太田沙織, 由田宏一, 中嶋博
北海道大学農学部農場研究報告, 0, 32, 1, 6, 北海道大学農学部附属農場, 29 Mar. 2001
Japanese

Composite and clinal distribution of Glycine soja in Japan revealed by RFLP analysis of mitochondrial DNA
A Tozuka, H Fukushi, T Hirata, M Ohara, A Kanazawa, T Mikami, J Abe, Y Shimamoto
THEORETICAL AND APPLIED GENETICS, 96, 2, 170, 176, Feb. 1998, [Peer-reviewed]
English, Scientific journal

Effect of Filtered Microbial Culture Medium, NOK-1, on Initial Growth Stage of Sugar Beet.
JIANG Z S, 平田聡之, 丸山春奈, 由田宏一, 中嶋博
てん菜研究会報, 40, 40, 50, 58, 甘味資源振興会, 1998, [Peer-reviewed], [Corresponding author]
Japanese

J. Abe, T. Hirata and Y. Shimamoto：“Assignment of Est1 locus to soybean linkage group 4” J. Hered. 88: 557-559. (1997)*　　　　　　　　　　　　　　　
1997, [Peer-reviewed]

Genetic differentiation between summer and autumn maturing cultivars of soybean (Glycine max (L) Merrill) in Kyushu district of Japan
T Hirata, M Kaneko, J Abe, Y Shimamoto
EUPHYTICA, 88, 1, 47, 53, 1996, [Peer-reviewed], [Lead author]
English, Scientific journal

RFLPs of chloroplast and mitochondrial genomes in summer and autumn maturing cultivar groups of soybean in Kyushu district of Japan.　　　　　　　　　　　　　　　
T. Hirata, J. Abe, Y. Shimamoto
Soybean Genet. Newsl, 23, 107, 111, 1996, [Lead author]

Phylogenetic Differentiation in Japanese Soybean Landraces with Early Matuarity on the Basis of Fatty Acid Composition of Oil in Seeds
Kaneko Megumi, Hirata Toshiyuki, Abe Jun
Research bulletin of the University Farm Hokkaido University, 29, 0, 31, 39, 北海道大学, 25 Mar. 1995
Japanese

Regional differentiation in agricultural characters of soybean landraces
Hirata Toshiyuki, Kaneko Megumi, Misawa Tameichi
Research bulletin of the University Farm Hokkaido University, 29, 0, 41, 54, 北海道大学, 25 Mar. 1995
Japanese

Protein and Oil Contents of Seeds in Japanese Soybean Cultivars with Early Maturity.
阿部純, 三沢為一, 大原雅, 平田聡之, 島本義也, 夏賀元康
北海道大学農学部農場研究報告, 28, 31, 40, Mar. 1993
Japanese

実験苗畑の休作地におけるカバークロップの利用
小池孝良, 増井昇, 増井昇, 北岡哲, 北岡哲, 佐々木圭子, 藤戸永志, 平田聡之, 渡部敏裕, 北方森林保全技術(Web), 42, 2025

北海道の石灰岩地に固有の国内希少種シリベシナズナの遺伝的管理単位と栽培土壌条件
高橋尚敏, 佐藤謙, 中川博之, 渡部敏裕, 平田聡之, 國府方吾郎, 村井良徳, 中村剛, 日本植物分類学会大会研究発表要旨集, 23rd, 2024

Comparative study on ear development, nitrogen allocation and soluble sugar composition in prolific and non-prolific hybrids of maize
松村悠生, 松井康眞, YANG Mengfan, 森垣拓巳, 市川伸次, 平田聡之, 若林侑, 柏木純一, 中島大賢, 日本作物学会講演会要旨集, 256th, 2023

Effects of interspecific interactions on crop productivity in spring wheat - soybean intercropping system
中田智夏, Qian C, 古賀美羽, 市川伸次, 平田聡之, 中島大賢, 柏木純一, 日本育種学会・日本作物学会北海道談話会会報(Web), 64, 2023

Varietal differences in nitrogen uptake and allocation in Hokkaido maize varieties for grain production
松井康眞, 松村悠生, 市川伸次, 竹村紘, 柏木純一, 平田聡之, 山田敏彦, 中島大賢, 日本育種学会・日本作物学会北海道談話会会報(Web), 63, 2022

Changes in storage components and organelles structure during filling of soybean seeds
Yoda N, Osada A, Suzuki T, Hirata T, Ito T, Abe J, Yamada T, Report of the Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, 60, 4, 5, 2019
Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, Japanese

北海道の草地で問題となっているハルガヤの特性
CHEN Gang Wen, CHEN Gang Wen, 小池真太郎, 大塚博志, 平田聡之, 平田聡之, 山田敏彦, 山田敏彦, 日本草地学会誌, 20 Mar. 2017
Japanese

アレロパシーを利用した高品質な春コムギの安定生産に関する研究
平田 聡之, 星野 洋一郎, 報告書, 283, 289, 2014
エリザベス・アーノルド富士財団, Japanese

Relationship between nitrogen content and seed components in soybean genetic resources
Tanabe D, Hirata T, Yasue K, Maruyama N, Abe J, Yamada T, Report of the Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, 54, 54, 65, 66, Dec. 2013
日本作物学会, Japanese

ヘアリーベッチ‐トマト輪作体系における前年施用ヘアリーベッチ由来窒素のトマトへの寄与率
杉原雄一, 上野秀人, 平田聡之, 荒木肇, 園芸学研究 別冊, 12, 1, 150, 23 Mar. 2013
Japanese

減肥料下でのカバークロップ‐トマト輪作体系におけるトマトの収量性と土壌炭素蓄積
杉原雄一, 平田聡之, 荒木肇, 農作業研究, 48, 115, 116, Mar. 2013
Japanese

施設生産における土壌・肥料および緑肥由来窒素のトマトによる生育時期別吸収および分配
杉原雄一, 上野秀人, 平田聡之, 荒木肇, 園芸学研究 別冊, 11, 2, 166, 22 Sep. 2012
Japanese

カバークロップマルチを導入したトマト生産の収量性と炭素隔離
荒木肇, 中野英樹, 高虫慧子, 星野洋一郎, 平田聡之, 園芸学研究 別冊, 9, 1, 142, 21 Mar. 2010
Japanese

カバークロップ利用による炭素貯留機能と亜酸化窒素によるオフセット
小松崎将一, 太田寛行, 牟英輝, 昭日格図, 荒木肇, 平田聡之, 三浦重典, 農作業研究, 43, 15, 16, May 2008
Japanese

SSRマーカーによるススキ属集団の遺伝解析
鈴木健司, 平田聡之, 山田敏彦, 日本草地学会誌, 54, 262, 263, 25 Mar. 2008
Japanese

土壌炭素貯留増加型の耕うんシステムに関する研究
牟英輝, 小松崎将一, 荒木肇, 平田聡之, 三浦重典, 農業機械学会年次大会講演要旨, 67th, 0, 367, 368, 20 Mar. 2008
農業食料工学会, Japanese

Characterization of germplasm of Miscanthus spp. using growth traits and SSR markers
Suzuki K, Hirata T, Yamada T, Report of the Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, 0, 48, 43, 44, Dec. 2007
日本作物学会, Japanese

カバークロップと耕うん方法がN₂Oフラックスに及ぼす影響
牟英輝, 小松崎将一, 森泉昭治, 劉遠, 荒木肇, 平田聡之, 農作業研究, 42, 2, 141, 15 Jun. 2007
Japanese

カバークロップと耕うんシステムが土壌窒素動態に及ばす影響
牟英輝, 小松崎将一, 森泉昭治, 坂井翔, 荒木肇, 平田聡之, 農作業研究, 41, 2, 91, 15 Jun. 2006
Japanese

耕地生態系のサスティナビリティ向上のための農作業システムに関する研究
牟英輝, 小松崎将一, 清水浩, 森泉昭治, 荒木肇, 平田聡之, 農業環境工学関連学会合同大会講演要旨集(CD-ROM), 2006, P1302, 2006
Japanese

カバークロップ利用と耕うんシステムが土壌CO₂フラックスに及ぼす影響
牟英輝, 小松崎将一, 森泉昭治, 楠本理香, 荒木肇, 平田聡之, 兼平藍子, 農業機械学会関東支部年次報告, 41st, 68, 69, 28 Jun. 2005
Japanese

ネオティホデュウムエンドファイトに感染したペレニアルライグラス(Lolium perenne)の生育に及ぼす環境の影響
山崎修一, 中嶋博, 平田聡之, 由田宏一, Grassl Sci, 48, 258, 259, 21 Sep. 2002
日本草地学会, Japanese

The changes in schedules of reproduction during life cycle associated with growth habit in Lolium
Ohnishi K, Matsuhino T, Hirata T, Nakashima H, Report of the Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, 0, 41, 5, 6, Dec. 2000
日本作物学会, Japanese

微生物分解型生ごみ処理装置による食堂残さのコンポスト化 (文部省S)
中嶋博, 寺沢実, 松田従三, 由田宏一, 平田聡之, 佐藤博二, 中辻浩喜, 鈴木啓太, 夏賀元康, 農林バイオマスの超効率的回収循環システムの開発 平成8-10年度 No.08556003, 1, 20, 1999
Japanese

生ごみコンポストの施与が畑作物の生育と収量に及ぼす影響 (文部省S)
中嶋博, 寺沢実, 松田従三, 由田宏一, 平田聡之, 佐藤博二, 中辻浩喜, 鈴木啓太, 夏賀元康, 農林バイオマスの超効率的回収循環システムの開発 平成8-10年度 No.08556003, 21, 45, 1999
Japanese

Water uptake of adzuki seed as affected by threshing methods and storing conditions
Takatsuka M, Yoshida K, Hirata T, Nakashima H, Report of the Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, 0, 39, 123, 124, Dec. 1998
日本作物学会, Japanese

Differentiation of shoot system construction mechanism based on life style in Lolium genus.
大西一光, 平田聡之, 由田宏一, 中嶋博, Grassl Sci, 44, 4, 5, Aug. 1998
日本草地学会, Japanese

Difference of Tiller System Development between Perennial Ryegrass and Italian Ryegrass.
大西一光, 平田聡之, 由田宏一, 中嶋博, 北海道草地研究会報, 32, 46, Jul. 1998
Japanese

Geographical distribution of isozyme alleles in wild soybean of China
Kitajima S, Hirata T, Abe J, Shimamoto Y, Xu D.H, Gao Z, Gao J.Y, Report of the Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, 0, 36, 100, 101, Dec. 1995
日本作物学会, Japanese

Geographical distribution of organelle genome in wild soybean of China
Fukushi H, Hirata T, Abe J, Shimamoto Y, Xu D.H, Gao Z, Gai J.Y, Report of the Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, 0, 36, 102, 103, Dec. 1995
日本作物学会, Japanese

Geographical differentiation of agronomic traits in soybean landraces.
Hirata T, Abe J, Shimamoto Y, Report of the Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, 35, 104, 105, Dec. 1994
The Crop Science Society of Japan, Japanese

Variation of seed components in soybean cultivar groups with early maturity.
金子めぐみ, 平田聡之, 阿部純, 島本義也, 育種学雑誌, 44, 254, 1994
Japanese

Isozyme variation in Chinese soybean landraces.
阿部純, 平田聡之, 金子めぐみ, 島本義也, THSENG F S, GAI J Y, 育種学雑誌, 44, 149, 1994
Japanese

The diversity and genetic basis of the insensitivity to long day length in soybeans with early maturity.
阿部純, 平田聡之, 島本義也, Jpn J Breed, 43, 267, 1993
Japanese

Phylogenetic differentiation in soybeans with early maturity: Characterization on fatty acids compositions of seeds.
金子めぐみ, 平田聡之, 阿部純, 島本義也, Jpn J Breed, 43, 195, 1993
Japanese

Allozyme variation of cultivated soybean in Japan, Taiwan, Korea and China.
Hirata T, Abe J, Shimamoto Y, Report of the Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, 33, 68, 69, Dec. 1992
The Crop Science Society of Japan, Japanese

Genetic analysis for soybean flowering response to long daylength condition.
Abe J, Hirata T, Yumoto S, Shimamoto Y, Report of the Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, 0, 33, 66, 67, Dec. 1992
日本作物学会, Japanese

Origin of native soybean cultivars with extremely early-maturity in Hokkaido
ABE J, HIRATA T, SHIMAMOTO Y, Report of the Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, 0, 31, 59, 59, Feb. 1992
日本作物学会, Japanese

Cultivated soybeans in Hokkaido: Allozymes and characters.
阿部純, 平田聡之, 島本義也, Jpn J Breed, 42, 288, 289, 1992
Japanese

Morphological diversity of marker chromosomes in G.soja.
柳沢貴司, 平田聡之, 原田久也, 福井希一, 田野茂光, 島本義也, Jpn J Breed, 42, 286, 287, 1992
Japanese

Analysis of DNA polymorphism of wild soybean (G.soja) by using synthesized oligonucleotides.
柳沢貴司, 平田聡之, 林正紀, 原田久也, 多々良敦, 島本義也, 秋浜友也, Jpn J Breed, 42, 250, 251, 1992
Japanese

Allozyme variations in land race and wild soybeans collected in Japan.
島本義也, 阿部純, 平田聡之, 大原雅, 三上哲夫, Jpn J Breed, 41, 134, 135, 1991
Japanese

Genetic differentiation of native soybeans with early maturity in Japan.
阿部純, 平田聡之, 島本義也, Jpn J Breed, 41, 130, 131, 1991
Japanese

Dimorphism and origin of native soybeans with extremeluy early maturity in Hokkaido.
阿部純, 平田聡之, 島本義也, Jpn J Breed, 41, 482, 483, 1991
Japanese

作物栽培体系，第8巻 飼料作物・緑肥作物の栽培と利用－　　　　　　　　　　　　　　　
平田 聡之, マメ科牧草
朝倉書店, May 2017, [Joint work]

カバークロップを主体としたスイートコーン栽培における最適な肥培管理方法
齊藤孝太朗, 中島大賢, 平田聡之
農作業研究, 2024
2024 - 2024, 36899150

定植栽培による緑肥作物すき込み後の作付の早期化の可能性（北海道支部講演会）
内林 大志, 平田 聡之, 信濃 卓郎
日本土壌肥料学会講演要旨集, 04 Sep. 2023, 一般社団法人 日本土壌肥料学会, Japanese
04 Sep. 2023 - 04 Sep. 2023, 36899151

定植栽培による緑肥作物すき込み後の作付の早期化の可能性
内林大志, 平田聡之, 信濃卓郎
日本土壌肥料学会講演要旨集(Web), 2023
2023 - 2023, 36899151

ヘアリーベッチを導入したソバ栽培体系における養分動態と生育特性の評価　　　　　　　　　　　　　　　
鈴木悠響, 平田聡之
農作業研究, 2023
2023 - 2023

有機質資材を併用したスイートコーン栽培における土壌内窒素の動態と生育,収量への影響
齊藤孝太朗, 平田聡之
農作業研究, 2023
2023 - 2023, 36899150

The effects on nutrient dynamics and yield traits in low environmental impact buckwheat cultivation with hairy vetch
Suzuki H, Hirata T
Report of the Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, 2022, Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, Japanese
2022 - 2022

秋作ヘアリーベッチが冬期の土壌内窒素環境と雑草の出芽に及ぼす影響
平田聡之, 内林大志, 松村篤
農作業研究, 2021
2021 - 2021, 36899151

ヘアリーベッチ残渣におけるシアナミドの分解の温度依存性と窒素動態に及ぼす影響
内林大志, 平田聡之, 松村篤
農作業研究, 2021
2021 - 2021, 36899151

DNA barcoding for identification of major Hokkaido weed species using a variable region in cpDNA
Hirata Toshiyuki, Nagano Hiroyuki, Dwiyanti Maria Stefanie, Akimoto Masahiro
Abstracts of Meeting of the CSSJ, 2021, CROP SCIENCE SOCIETY OF JAPAN, Japanese
2021 - 2021, 14248134

The impact of cyanamide in hairy vetch on the initial growth of a subsequent crop
Uchibayashi H, Hirata T
Report of the Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, 2020, Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, Japanese
2020 - 2020, 36899151

Difference of growth characteristics of rice 'Akitakomachi' grown near the southern and northern limits
Li Cuizhengyang, Hirata Toshiyuki, Kenichi Tatsumi, Kuwabara Yoshiki, Motobayashi Takashi, Araki Hajime
Abstracts of Meeting of the CSSJ, 2018, Japanese

ハルガヤのアレロパシーが採草地の草地構成に与えるインパクト
平田聡之, 毛糠智子, 山田敏彦
日本生態学会大会講演要旨(Web), 2018, Japanese

Accumulation of allelochemicals in sweet vernal grass (Anthoxanthum odoratum)and impact to pasture renovation
毛糠智子, 平田聡之, 沖野龍文, 山田敏彦
日本育種学会・日本作物学会北海道談話会会報(Web), 2017, Japanese

ヘアリーベッチと初冬播き春コムギの輪作における養分吸収
野口大輔, 平田聡之, 荒木肇
農作業研究, Mar. 2016, Japanese

Effect of reduced fertilizer using hairy vetch production in spring wheat cropping system in Hokkaido
Noguchi D, Hirata T, Tsunoda T, Uchino N, Araki H
Report of the Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, 2016, Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, Japanese
2016 - 2016

Evaluation of winter survival ability of early winter seeded spring wheat after hairy vetch production
Hirata T, Hoshino Y, Kii S, Niki K, Noguchi D
Report of the Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, Dec. 2014, Japanese

ヘアリーベッチによる初冬播き春コムギの初期生育の抑制
平田聡之, 瓜本明日香, 星野洋一郎, 荒木肇
農作業研究, May 2014, Japanese
May 2014 - May 2014

Effect of hairy betch production on following spring wheat seedling emergence in early winter
Urimoto A, Hirata T, Hoshino Y
Report of the Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, Dec. 2013, 日本作物学会, Japanese
Dec. 2013 - Dec. 2013

春コムギ初冬播き栽培の問題点と不耕起・カバークロップ栽培による改善
平田聡之, 片岡崇, 角田貴敬, 荒木肇
農作業研究, Mar. 2013, Japanese
Mar. 2013 - Mar. 2013

春コムギ・カバークロップ連作圃場における土壌内易分解性窒素の動態
永山毅, 平田聡之, 荒木肇
農作業研究, Mar. 2012, Japanese
Mar. 2012 - Mar. 2012

北海道における春コムギ‐カバークロップ一年輪作体系の有効性 1.窒素収支からみた肥料効果の検証
永山毅, 平田聡之, 荒木肇
農作業研究, Jul. 2011, Japanese
Jul. 2011 - Jul. 2011

北海道における春コムギ‐カバークロップ一年輪作体系の有効性 2.コムギ生育期間における無機養分の動態
平田聡之, 永山毅, 荒木肇
農作業研究, Jul. 2011, Japanese
Jul. 2011 - Jul. 2011

カバークロップ‐コムギ輪作圃場における植物残渣とコムギの生育量の相互作用
平田聡之, 永山毅, 荒木肇
日本生態学会大会講演要旨集, 08 Mar. 2011, Japanese
08 Mar. 2011 - 08 Mar. 2011

耕起方法と冬期カバークロップの組合せが土壌の微生物活性と関連形質に及ぼす影響
中元朋実, 小松崎将一, 平田聡之, 荒木肇
日本土壌肥料学会講演要旨集, 07 Sep. 2010, 一般社団法人日本土壌肥料学会, Japanese
07 Sep. 2010 - 07 Sep. 2010

耕起頻度の異なるカバークロップ・春コムギ輪作体系における植物体内窒素・炭素の推移
平田聡之, 荒木肇
農作業研究, Apr. 2009, Japanese
Apr. 2009 - Apr. 2009

開花期QTL領域上にあるSSRマーカー多型からみたアカクローバ3品種における遺伝構造の推移
青柳由希子, 平田聡之, 山田敏彦
日本草地学会誌, 25 Mar. 2009, Japanese
25 Mar. 2009 - 25 Mar. 2009

ハイパースペクトル画像解析によるカバークロップ圃場の草種識別および草量推定
鈴木由美子, 岡本博史, 平田聡之, 片岡崇, 柴田洋一
日本草地学会誌, 25 Mar. 2009, Japanese
25 Mar. 2009 - 25 Mar. 2009

北海道における秋作カバークロップ栽培の土壌養分に対する影響
平田聡之, 荒木肇
農作業研究, May 2008, Japanese
May 2008 - May 2008

早晩性の異なるアカクローバ品種における再生個体の開花習性の変異
青柳由希子, 平田聡之, 山田敏彦
日本草地学会誌, 25 Mar. 2008, Japanese
25 Mar. 2008 - 25 Mar. 2008

テクスチャ量による画像解析を利用した混播カバークロップほ場の草種識別
内山大輔, 岡本博史, 平田聡之, 鈴木由美子, 片岡崇
農業機械学会年次大会講演要旨, 20 Mar. 2008, 農業食料工学会, Japanese
20 Mar. 2008 - 20 Mar. 2008

カバークロップ草地における草種構成と土壌養分の相互作用
平田聡之, 荒木肇
日本生態学会大会講演要旨集, 14 Mar. 2008, Japanese
14 Mar. 2008 - 14 Mar. 2008

Changes of soil inorganic nitrogen after short-term cultures of hairy vetch and bristle oat under tillage and no-tillage conditions at Sapporo, Japan.　　　　　　　　　　　　　　　
PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON SUSTAINABLE AGRICULTURE FOR FOOD, ENERGY AND INDUSTRY, 2008
2008 - 2008

早晩性の異なるアカクローバ品種における開花習性の変異
青柳由希子, 平田聡之, 山田敏彦
日本草地学会誌, 24 Mar. 2007, Japanese
24 Mar. 2007 - 24 Mar. 2007

採草地におけるアカクローバの個体群動態に及ぼす個体配置の影響
平田聡之, 青柳由希子, 山田敏彦
日本生態学会大会講演要旨集, 19 Mar. 2007, Japanese
19 Mar. 2007 - 19 Mar. 2007

Distinction between Plant Species in Mixed Covercrop Field Using Hyperspectral Imaging
内山大輔, 岡本博史, 平田聡之, 片岡崇, 端俊一
農業機械学会北海道支部会報, 15 Mar. 2007, Japanese
15 Mar. 2007 - 15 Mar. 2007

ハイパースペクトル画像解析による混播カバークロップほ場の草種識別
内山大輔, 岡本博史, 鈴木由美子, 平田聡之, 片岡崇, 端俊一
農業環境工学関連学会合同大会講演要旨集(CD-ROM), 2007, Japanese
2007 - 2007

アカクローバ品種における生育特性の刈取処理による影響
青柳由希子, 平田聡之, 山田敏彦
日本草地学会誌, 29 Oct. 2006, Japanese
29 Oct. 2006 - 29 Oct. 2006

カバークロップ草地におけるハイパースペクトルカメラによる草種判定法の検証
平田聡之, 内山大輔, 岡本博史, 山田敏彦
日本草地学会誌, 29 Oct. 2006, Japanese
29 Oct. 2006 - 29 Oct. 2006

輪作圃場における土壌養分の空間変異の推移
平田聡之, 荒木肇
農作業研究, 15 Jun. 2006, Japanese
15 Jun. 2006 - 15 Jun. 2006

画像処理によるイネ科・マメ科カバークロップの識別を利用した土壌成分分布の推定
内山大輔, 岡本博史, 片岡崇, 端俊一, 平田聡之
農業環境工学関連学会合同大会講演要旨集(CD-ROM), 2006, Japanese
2006 - 2006

アカクローバ品種における時期の異なる刈取処理が生活史特性に及ぼす影響
青柳由希子, 平田聡之, 由田宏一, 中嶋博
日本草地学会誌, 26 Mar. 2005, Japanese
26 Mar. 2005 - 26 Mar. 2005

携帯型精密播種板の製作とその草地生態学的実験への利用
平田聡之, 河合孝雄, 青柳由希子, 荒木肇
日本草地学会誌, 26 Mar. 2005, Japanese
26 Mar. 2005 - 26 Mar. 2005

局所スケールに基づくアカクローバ個体群の持続性の解析 5. 個体の出芽時期と永続性との関連性の検討
平田聡之, 青柳由希子, 由田宏一, 中嶋博
日本草地学会誌, 26 Mar. 2005, Japanese
26 Mar. 2005 - 26 Mar. 2005

Dynamics of chemical property and microclimate in soil under rotational cropping system.　　　　　　　　　　　　　　　
First Asian Conference on Precision Agriculture, 2005, English, Oral presentation
2005 - 2005

局所スケールに基づくアカクローバ個体群の持続性の解析 4.密度勾配区による局所個体群密度と持続性との関連性の検討
平田聡之, 由田宏一, 中嶋博
Grassl Sci, 26 Mar. 2004, Japanese
26 Mar. 2004 - 26 Mar. 2004

局所スケールに基づくアカクローバ個体群の持続性の解析 3.立地の異なるアカクローバ個体群における個体消失の空間パターンの差異
平田聡之, 由田宏一, 中嶋博
Grassl Sci, 26 Mar. 2004, Japanese
26 Mar. 2004 - 26 Mar. 2004

Density dependence of life history traits in red clover
HIRATA Toshiyuki
Abstracts of the Annual Meeting of the Ecological Society of Japan, 2004, ECOLOGICAL SOCIETY OF JAPAN
2004 - 2004, アカクローバは、生育期間が2-4年である短年生草本に分類されており、本来、造成後5-10年以上利用される採草用牧草地への利用には適さない草種といえる。個体の持続性のような植物の生活史特性は、個々の個体の遺伝的要因に加え、その近傍の環境的要因に支配されている。本報告では、アカクローバの生活史特性における密度効果の影響を検討するため、局所密度に勾配を持たせた密度勾配区を設け、アカクローバの生活史特性と局所密度間の関連について検討した。<br>調査した品種は、古くから北海道で利用されている「サッポロ」とそれを母材の一部として育成された「ホクセキ」である。2001年6月に、各品種のプラグ苗を、起点から８方向に、株間3cm、5cm、10cmおよび20cmでそれぞれ３列定植し、試験区(各品種5試験区)とした。各試験区は、４つの密度区(UH区、H区、N区、L区、各区の３列目はボーダ)を設けた。調査は、3試験区については2001年から2003年の刈取時(年２回、2001年は1回のみ)に行い、生存個体の配置を調査した後、各密度区あたり4-6個体について個体毎に開花頭花数、着花茎数、部位別乾物重を調査し、2003年の刈取2回目では、堀取調査を行った。残りの2試験区は、刈取を行わず、１試験区は2001年に、生存率および堀取調査、もう一つの試験区では、2002年における生存率の調査を行った。<br>各密度区間で生存割合を比較したところ、局所密度が高くなるにつれ生存割合が減少する傾向が認められた。開花個体の割合は、2002年刈取１回目までは局所密度が低下するにつれ、増加する傾向が認められたが、それ以降、サッポロのUL区を除き、差異が減少した。乾物分配では、2001年の調査では高密度区で頭花の割合が高かったのみ対し、2003年の調査では、高密度区で根部の割合が高かった。以上のように、アカクローバにおいて生活史特性の密度依存性が認められた。<br>

局所スケールに基づくアカクローバ個体群の持続性の解析 2. 収量減少期における茎伸長個体と茎未伸長個体の推移
平田聡之, 由田宏一, 中嶋博
Grassl Sci, 24 Mar. 2003, 日本草地学会, Japanese
24 Mar. 2003 - 24 Mar. 2003

個体レベルからみた採草用牧草地におけるアカクローバ個体群の持続性
平田 聡之
日本生態学会大会講演要旨集, 2003, 日本生態学会, Japanese
2003 - 2003

局所スケールに基づくアカクローバ個体群の持続性の解析 1 播種後2~4年目におけるアカクローバ生存個体の局所空間分布の推移
平田聡之, 由田宏一, 中嶋博
Grassland Science, 21 Sep. 2002, 日本草地学会, Japanese
21 Sep. 2002 - 21 Sep. 2002

アカクローバ単播草地における個体消失のパターンと採草量の変動
平田聡之, 森下浩, 由田宏一, 中嶋博
北海道草地研究会報, 10 Jul. 2001, Japanese
10 Jul. 2001 - 10 Jul. 2001

格子コドラートを用いたアカクローバ単播草地における個体消失過程と採草量の変動の解析
平田聡之, 森下浩, 由田宏一, 中嶋博
Grassl Sci, 31 Mar. 2001, 日本草地学会, Japanese
31 Mar. 2001 - 31 Mar. 2001

アカクローバ・オーチャードグラス混播採草地における自然下種によるアカクローバ個体の加入と採草量の変動
平田聡之, 由田宏一, 中嶋博
Grassl Sci, 19 Jul. 2000, 日本草地学会, Japanese
19 Jul. 2000 - 19 Jul. 2000

Effect of filtered microbial culture medium, NOK-1, on yield of sugar beet
Jiang Z. S, Hirata T, Ota S, Yoshida K, Nakashima H, Okamoto T
Report of the Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, Dec. 1998, 日本作物学会, Japanese
Dec. 1998 - Dec. 1998

Genetic diversity and differentiation in red clover for isozymes.
平田聡之, 由田宏一, 島本義也, 中嶋博
育種学雑誌, 1997, Japanese
1997 - 1997

Geographical differentiation of agronomic traits in soybean landraces.
Hirata T, Abe J, Shimamoto Y
Report of the Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, Dec. 1994, 日本作物学会, Japanese
Dec. 1994 - Dec. 1994

Polymorphism and geographical differences of cytoplasmic genome in soybean landraces.
平田聡之, 阿部純, 三上哲夫, 島本義也
育種学雑誌, 1994, Japanese
1994 - 1994

T. Hirata, M. Kaneko, J. Abe and Y. Shimamoto：“Genetic structure of cultivated soybeans in Japan.”, Proceedings of the 7th International Congress of the SABRAO and WSAA. pp241-246, (1994)　　　　　　　　　　　　　　　
1994
1994 - 1994

Differentiation of cytoplasmic genome in cultivated soybeans.
平田聡之, 阿部純, 久野宏, 三上哲夫, 加藤澄恵, 島本義也
Jpn J Breed, 1993, Japanese
1993 - 1993

Genetic differentiation of cultivated soybean: A possibility of introgressive hybridization.
平田聡之, 阿部純, 島本義也
Jpn J Breed, 1993, Japanese
1993 - 1993

Allozyme variation of cultivated soybean in Japan, Taiwan, Korea and China.
Hirata T, Abe J, Shimamoto Y
Report of the Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, Dec. 1992, 日本作物学会, Japanese
Dec. 1992 - Dec. 1992

Isozyme variation in native soybean cultivars of Japan
HIRATA T, ABE J, SHIMAMOTO Y
Report of the Hokkaido Branch, the Japanese Society of Breeding and Hokkaido Branch, the Crop Science Society of Japan, Feb. 1992, 日本作物学会, Japanese
Feb. 1992 - Feb. 1992

Genetic differentiation of cultivated soybean in Japan, Taiwan, Korea, China and CIS.
平田聡之, 阿部純, 島本義也
Jpn J Breed, 1992, Japanese
1992 - 1992

Genetic differentiation between summar and autumn season types of soybean in Kyusyu, Japan.
平田聡之, 阿部純, 島本義也
Jpn J Breed, 1991, Japanese
1991 - 1991

Isozyme and differentiation in land races of soybean in Japan.
平田聡之, 阿部純, 島本義也
Jpn J Breed, 1991, Japanese
1991 - 1991

植物性タンパク質（大豆）の育種基盤構築と栽培技術確立　　　　　　　　　　　　　　　
戦略的イノベーション創造プログラム
Sep. 2023 - Mar. 2028
Coinvestigator

Kinetic study for synchronization nutrients requirement of Crop production and nutrients supply from cover crop residues.
Grants-in-Aid for Scientific Research
01 Apr. 2022 - 31 Mar. 2025
平田 聡之, 中島 大賢
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, 22K05925

The effects of cover crop containing allelochemicals on decomposition of organic matter and weed suppression in winter
Grants-in-Aid for Scientific Research
01 Apr. 2018 - 31 Mar. 2021
HIRATA Toshiyuki
The effect of hairy vetch on weed emergence in early spring was investigated by analyzing cyanamide, a major allelochemical in hairy vetch, soil microbe structure, and soil nitrogen dynamics during winter. Although cyanamide in the hairy vetch during winter decreased below the detection range by February, ammonia nitrogen in soil increased rapidly after February. It suggested that the increase in ammonia nitrogen was not due to the nitrification-inhibiting effect of cyanamide-derived dicyandiamide formation but due to low temperatures. Germination tests of weeds treated with ammoniacal nitrogen concentration in early spring showed a delay in the average germination days at low temperatures. These results show that the weed suppression effect of hairy vetch in early spring was due to ammonia damage.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, 18K05918

北海道雑草種のDNA バーコーディングと群集評価技術への応⽤
ロバスト農林⽔産⼯学国際連携研究教育拠点構想
May 2019 - Mar. 2020
平田 聡之
北海道大学, Principal investigator, Competitive research funding

難防除雑草ハルガヤの有効防除技術確立事業　　　　　　　　　　　　　　　
畜産振興事業
Apr. 2014 - Mar. 2017
山田敏彦
日本中央競馬会, Competitive research funding

Effect of hairy vetch and no-till cultivation on spring wheat production seeded in early winter
Grants-in-Aid for Scientific Research
01 Apr. 2012 - 31 Mar. 2015
HIRATA Toshiyuki, ARAKI Hajime, KATAOKA Takashi
Although the availability of soil nutrients on combination of no-till and hairy vetch cultivation was increased, the improvement of the working efficiency on no-till seeding in early winter was not detected. It was shown that the growth and the yield of wheat were superior in addition of hairy vetch residue in pots tests. After snow melt , however, the number of wheat seedlings seeded in early winter was less than that of spring seeded wheat. The ratio of normal seedlings was decreases under the snow in the case of hairy vetch residues incorporation. The results of this study were exhibited less advantage to the combination of hairy vetch cultivation and no-till sowing of spring wheat in early winter. We are examining for the effects of autumn plowing.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, Principal investigator, Competitive research funding, 24580363

Establishment of organic production system with resource-saving and greenhouse gas-reduction by cover cropping
Grants-in-Aid for Scientific Research
2009 - 2011
ARAKI Hajime, DAIMON Hiroyuki, NAKAMOTO Tomomi, UENO Hideto, KOMATSUZAKI Masakazu, HIRATA Toshiyuki
Continuous application of cover crops increased soil carbon and activated important enzymes in soil. GHG (Greenhouse gas) was released when cover crops were incorporated, however it was inhibited by no-till cultivation. Fungi increased and water-stable aggregate was formed in the soil with application of gramineous cover crops. Mycorrhizal fungi were proliferated after decomposition of hairy vetch, one of legume cover crops, and supported phosphorus uptake into plant. Much amounts of N released by decomposition of legume cover crops were used for subsequent crops. Cover crops are important tool of organic agriculture with reduction of GHG.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 21380151

積雪地域におけるヘアリーベッチの冬枯れ残渣を利用した減肥料栽培技術の開発
産学が連携した研究開発成果の展開 研究成果展開事業 地域事業 地域イノベーション創出総合支援事業 シーズ発掘試験
2009 - 2009
平田 聡之
マメ科カバークロップによる土壌環境改善、雑草防除効果等は多く報告されているが、冷涼・積雪により栽培期間の短い北海道では、その利用法が限定されていた。本研究では、低温環境での初期生育の優れたマメ科草本であるヘアリーベッチを晩夏播きし、積雪前に茎葉をある程度まで繁茂させ、積雪下で死亡させた後、その冬枯れした残渣を有機質肥料として利用する栽培技術を検討するものである。
北海道大学, Principal investigator

Soil biology and nutrition recycling in sustainable production system with cover crops
Grants-in-Aid for Scientific Research
2004 - 2006
ARAKI Hajime, KOMATSUZAKI Masakazu, UENO Hideto, HIRATA Toshiyuki
1.Upland field
Recycling of nitrogen was examined in No-tilled filed and tiled field (plow and rotary) with cover crops, rye and hairy vetch (HV). HV absorbed most amount of nitrogen(N) from the soil and its N was transferred to the subsequently produced land rice. Microorganism increased in the soil with cover crops, especially in near ground surface in no-tilled soil. Number of the large soil animal increased in no-tilled soil. It was supposed that New soil ecosystem that N recycling would be promoted was established in no-tilled field with cover crops.
2.Paddy field
In the paddy field mulched or incorporated 15N-labeled cover crops, the absorbed efficiency of N mineralized from cover crops and rice growth were larger in incorporation than mulch treatment. Legume cover crops were decomposed in the paddy earlier than non-legumes. White clover, oats and mustard are promising cover crop for rice production in south-west region in Japan and decomposing time can be controlled by irrigation technique.
3.Greenhouse
Higher concentration of Nitrate-N was maintained near soil surface in the row covered with HV residue in greenhouse. Current yield was obtained in HV mulch even if N fertilizer reduced to half amount of conventional amount. About 17% of N mineralized from HV residue was absorbed into tomato plant and the absorbed efficiency of N mineralized from HV was high in reduced N application.
4.Estimation of the ratio of grass and legume in mix-cultivation
Multi-wavelength analysis of reflex light on the grass-legume mixed canopies using a hyper spectrum camera was useful to Estimation of the ratio of grass and legume.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, Coinvestigator not use grants, Competitive research funding, 16380165

Development of effective reclamation and circulation system of agricultural biomass
Grants-in-Aid for Scientific Research
1996 - 1998
NAKASHIMA Hiroshi, HIRATA Toshiyuki, NAKATSUJI Hiroshi, YOSHIDA Koichi, MATSUDA Juzo, TERAZAWA Minoru
The compst was made from bio-product mainly garbage by composting machine. The effects of compost application on crop growth and yield were investigated in spring wheat and adzuki bean. In 1997, the composts were applied in two different times (2 wks before seeding and on the day of seeding) and four different amounts(0,2,4, and 8kg/m_2). In comparison with the conventional fertilizer application, the yields of wheat were about the same as that of applied on the day of seeding and about 14% increase in 2 wks before seeding. The effects of the amount of compost was rather small. On the other...
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), HOKKAIDO UNIVERSITY, Coinvestigator not use grants, Competitive research funding, 08556003

Evaluation and basic research in Chinese crop germplasm
Grants-in-Aid for Scientific Research
1995 - 1996
MORISHIMA Hiroko, HIRATA Toshiyuki, ABE Jun, SHIMAMOTO Yoshiya, TSUJIMOTO Hisashi, KATO Kenji, TSUYUZAKI Hiroshi, TAKADA Kazuyoshi, SATO Yoichiro, WANG X.K, CAI H.W, LIANG Y.M, LI D.Y, GAI J.Y, WU J.R, ZHOU Y.H, YAN J, SANO Y, SATO K, LI W.J
Target plants of our project are landrace and wild relatives of rice, wheat, barley and soybean distributed in China. Objectives of the field trip were firstly observation of geographical distribution and ecological condition of their habitats, and secondly, if possible, collection of their seeds for genetic characterization.
1) Rice group : With a kind cooperation of Guangxi Academy of Agricultural Sciences, we could visit 18 sites inhabited by wild progenitor of cultivated rice (Oryza rufipogon) in Guangxi Province. This wild rice is known to be differentiated into perennial and annual ecotypes in tropical Asia, but all populations we observed during our trip were perennial type. They seemed to have unique characteristics differing from perennials grown in tropical areas. In some populations, gene flow from adjacent rice fields was observed. More serious problem is destruction of the natural habitats of wild rice due to urbanization or environmental development.
2) Wheat-Barley group : In Tibet and Si-Chuan, farmers' fields of wheat and barley were observed and seed sampling was done with the cooperation of scientists of Si Chuan Agricultural University. During two trips in 1995 and 1996, more than 600 samples each of wheat and barley were obtained. "Irregulare" type of barley which has been reported only in Ethiopia was firstly found in Tibet.
3) Soybean group : Farmers' fields of landraces were visited in mountain tribe villages in Gui-Zhou Province and Xi-Shuang Bian Na, Yunnan Province, and diverse types were observed. Distribution of wild soybean (Glysine soja) was surveyed in Northeast and South (Quangxi) China, and along Yellow River. It was confirmed wild soybean is not distributed in South China.
Introduction of seed samples of important crops from China is quite restricted officially. For wheat and barley, Chinese counterpart scientists could bring the collected smaples with them for cooperative study in Japan. Materials are now grown in experimental field in Japan, and preliminary survey of characters is going on. For wild rice, one of the Chinese team-members was able to work in Nat. Inst. Genet., and Chinese materials are now under study. For soybean, DNA was extracted and mitochondrial genome is studied in a laboratory of Chinese University by scientists from both countries.
Japan Society for the Promotion of Science, Grant-in-Aid for international Scientific Research, National Institute of Genetics, Coinvestigator not use grants, Competitive research funding, 07041154