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OH Seongjin

Research Faculty of Agriculture　Fundamental AgriScience Research　Animal ScienceAssistant Professor

Researcher basic information

■ Degree
  • D. Agr., Hokkaido University
■ URL
researchmap URLホームページURL■ Various IDs
J-Global ID■ Research Keywords and Fields
Research Field
  • Others, Others
■ Educational Organization

Career

■ Career
Career
  • Apr. 2019 - Present
    北海道大学農学研究院, 畜牧体系学研究室, 助教

Research activity information

■ Papers
  • Effect of grain vinegar feeding on milk production and fatty acid profile of Holstein cows
    Seongjin Oh; Tomohiro Mitani; Masahito Kawai; Koichiro Ueda
    Journal of Animal Science and Technology, 66, 6, 1162, 1169, Korean Society of Animal Science and Technology, 30 Nov. 2024
    Scientific journal
  • Addition of ginkgo fruit to cattle feces and slurry suppresses methane production by altering the microbial community structure
    Risa Shintani; Seongjin Oh; Yutaka Suzuki; Satoshi Koike; Yasuo Kobayashi
    Animal science journal = Nihon chikusan Gakkaiho, 92, 1, e13620, 01 Dec. 2021, [International Magazine]
    English, Scientific journal
  • 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.
    Tomohiro Mitani; Sawako Nakajima; Seongjin Oh; Masahito Kawai; Koichiro Ueda
    Animal science journal = Nihon chikusan Gakkaiho, 92, 1, e13639, 2021, [International Magazine]
    English, Scientific journal, 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.
  • In vitro and in vivo evaluation of kenaf (Hibiscus cannabinus L.) as a roughage source for beef cattle
    Seongjin Oh; David Tinotenda Mbiriri; Chaehwa Ryu; Kangheon Lee; Sangbuem Cho; Nag-Jin Choi
    Asian-Australasian Journal of Animal Sciences, 31, 10, 1598, 1603, Asian Australasian Association of Animal Production Societies, Oct. 2018, [Peer-reviewed], [International Magazine]
    English, Scientific journal
  • Effect of ginkgo extract supplementation on in vitro rumen fermentation and bacterial profiles under different dietary conditions
    Seongjin Oh; Satoshi Koike; Yasuo Kobayashi
    ANIMAL SCIENCE JOURNAL, 88, 11, 1737, 1743, Nov. 2017, [Peer-reviewed], [International Magazine]
    English, Scientific journal
  • Potency of ginkgo fruit for modulation of rumen microbiota and fermentation
    OH Seongjin; SUZUKI Yutaka; KOIKE Satoshi; KOBAYASHI Yasuo
    栄養生理研究会報, 61, 2, 33‐41, 41, 家畜栄養生理研究会, Sep. 2017
    English
  • Ginkgo fruit extract as an additive to modify rumen microbiota and fermentation and to mitigate methane production
    S. Oh; R. Shintani; S. Koike; Y. Kobayashi
    JOURNAL OF DAIRY SCIENCE, 100, 3, 1923, 1934, Mar. 2017, [Peer-reviewed]
    English, Scientific journal
  • Potency of cashew nut shell liquid in rumen modulation under different dietary conditions and indication of its surfactant action against rumen bacteria.
    Oh S; Suzuki Y; Hayashi S; Suzuki Y; Koike S; Kobayashi Y
    Journal of animal science and technology, 59, 27, 27, 2017, [Peer-reviewed], [International Magazine]
    English, Scientific journal, Background: Cashew nut shell liquid (CNSL) is an agricultural byproduct containing alkylphenols that has been shown to favorably change the rumen fermentation pattern only under experimentally fixed feeding conditions. Investigation of CNSL potency in rumen modulation under a variety of feeding regimens, and evidence leading to the understanding of CNSL action are obviously necessary for further CNSL applications. The objective of this study was to evaluate the potency of CNSL for rumen modulation under different dietary conditions, and to visually demonstrate its surfactant action against selected rumen bacteria. Methods: Batch culture studies were carried out using various diets with 5 different forage to concentrate (F:C) ratios (9:1, 7:3, 5:5. 3:7 and 1:9). Strained rumen fluid was diluted with a buffer and incubated with each diet. Gas and short chain fatty acid (SCFA) profiles were characterized after 18 h incubation at 39 °C. Monensin was also evaluated as a reference additive under the same conditions. Four species of rumen bacteria were grown in pure culture and exposed to CNSL to determine their morphological sensitivity to the surfactant action of CNSL. Results: CNSL supplementation decreased total gas production in diets with 5:5 and 3:7 F:C ratios, whereas the F:C ratio alone did not affect any gas production. Methane decrease by CNSL addition was more apparent in diets with 5:5, 3:7, and 1:9 F:C ratios. An interactive effect of CNSL and the F:C ratio was also observed for methane production. CNSL supplementation enhanced propionate production, while total SCFA production was not affected. Monensin decreased methane production but only in a diet with a 1:9 F:C ratio with increased propionate. Studies of pure cultures indicated that CNSL damaged the cell surface of hydrogen- and formate-producing bacteria, but did not change that of propionate-producing bacteria. Conclusion: CNSL can selectively inhibit rumen bacteria through its surfactant action to lead fermentation toward less methane and more propionate production. As CNSL is effective over a wider range of dietary conditions for such modulation of rumen fermentation in comparison with monensin, this new additive candidate might be applied to ruminant animals for various production purposes and at various stages.
  • Use of Asian selected agricultural byproducts to modulate rumen microbes and fermentation
    Yasuo Kobayashi; Seongjin Oh; Htun Myint; Satoshi Koike
    Journal of Animal Science and Biotechnology, 7, 1, 70, 70, BioMed Central Ltd., 15 Dec. 2016, [Peer-reviewed], [International Magazine]
    English, Scientific journal
  • Use of Asian selected agricultural byproducts to modulate rumen microbes and fermentation
    Yasuo Kobayashi; Seongjin Oh; Htun Myint; Satoshi Koike
    JOURNAL OF ANIMAL SCIENCE AND BIOTECHNOLOGY, 7, 1, Dec. 2016, [Peer-reviewed]
    English
  • The Influence of Feed Energy Density and a Formulated Additive on Rumen and Rectal Temperature in Hanwoo Steers
    Sangbuem Cho; David Tinotenda Mbiriri; Kwanseob Shim; A-Leum Lee; Seong-Jin Oh; Jinho Yang; Chaehwa Ryu; Young-Hoon Kim; Kang-Seok Seo; Jung-Il Chae; Young Kyoon Oh; Nag-Jin Choi
    ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES, 27, 11, 1652, 1662, Nov. 2014, [Peer-reviewed]
    English, Scientific journal
■ Other Activities and Achievements
■ Syllabus
  • 家畜生態学特論, 2024年, 修士課程, 農学院
  • 牧場実習, 2024年, 学士課程, 農学部
  • 畜産科学概論, 2024年, 学士課程, 農学部
  • 一般教育演習(ﾌﾚｯｼｭﾏﾝｾﾐﾅｰ), 2024年, 学士課程, 全学教育
  • 家畜生産実習, 2024年, 学士課程, 農学部
  • 畜牧体系科学実験, 2024年, 学士課程, 農学部