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OHSHIMA Hiroyuki Assistant Professor |
From Graduate School 【 display / non-display 】
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Tokyo University of Agriculture Graduate School, Division of Agriculture Doctoral program (second term) Completed
2004.04 - 2008.03
Country：Japan
Employment Record in Research 【 display / non-display 】
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Tokyo University of Agriculture Faculty of Applied Bio-Science Department of Applied Biology and Chemistry Researcher
2008.04 - 2009.03
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Tokyo University of Agriculture Faculty of Applied Bio-Science Department of Applied Biology and Chemistry Research Assistant
2009.04 - 2011.03
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Tokyo University of Agriculture Faculty of Applied Bio-Science Department of Applied Biology and Chemistry Assistant Professor
2011.04 - 2018.03
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Tokyo University of Agriculture Faculty of Applied Bio-Science Department of Agricultural Chemistry Assistant Professor
2018.04
Research Areas 【 display / non-display 】
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Life Science / Plant nutrition, soil science / 土壌学 肥料学
Papers 【 display / non-display 】
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Sahara Iori, Inubushi Kazuyuki, Anzai Sakura, Sudo Shigeto, Nishihara Eiji, Chandra Mohan, Diptanu Banik, Gaurav Kumar, Kato Taku, Oshima Hiroyuki, Hayashida Sachiko, Patra Prabir
Soil Science and Plant Nutrition 71 ( 3 ) 282 - 292 2025.04
Language：English
Rice-wheat cropping system in Northwest India has been established since green revolution starting in the 1960s, based on modern varieties of crops and sufficient supply of water and nutrients. However, due to decrease in water availability and intensive cropping, soil fertility and soil organic matter contents started to decline. Also, mismanagement (burning) of crop residue induces air pollution, affecting human health. To address the issue of burning straw, other sustainable straw management alternatives are being evaluated from agronomic viewpoint. As for mitigation of air pollution and greenhouse gas emissions from soil, crop residue can be converted to biochar for various applications. We conducted field and laboratory incubation experiments to investigate the effects of two kinds of biochar (made from rice husk and rice straw) on soil properties and greenhouse gas emissions from wheat fields. After two seasons of field experiments, soil total C were increased only by rice-husk biochar application as compared with no amendment, rice straw biochar and chemical fertilizers. Greenhouse gases (GHGs; CO2, CH4 and N2O) were sampled by chamber method, measured by gas chromatography, then calculated emissions as CO2eq using Global Warming Potentials (GWPs). We found CO2 emission as dominant among three gases in the field experiment, although this included root respiration, and were not significantly changed by biochar application, compared to the control (chemical fertilizer application only). The incubation experiment showed that N2O was dominant among the three gases and increased by biochar application as compared to the control, corresponding to 0.9 and 14% of GHGs increase by rice-husk and rice-straw biochar, respectively, while the latter was equivalent to 0.2% of total C from rice-straw biochar applied.
Although wheat yield was not significantly increased, the co-benefit of reduction in crop residue burning by rice-husk biochar application and contribution to nternational efforts of GHG emission mitigation envisage for sustainable carbon neutrality in an agriculture system. -
Kazuyuki Inubushi, Riki Satomi, Meisei Ohsaka, Iori Sahara, Taku Kato, Hiroyuki Oshima, Miwa Matsushima
Soil Science and Plant Nutrition 71 ( 3 ) 333 - 340 2025.02
Language：English
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Effect of biodegradable plastics on greenhouse gas emission and paddy rice growth under flooding conditions Reviewed International journal
Kazuyuki Inubushi・Iori Sahara・Taku Kato· Hiroyuki Oshima
Biology and Fertility of Soils 60 875 - 882 2024.07
Language：English Publishing type：Research paper (scientific journal)
Biodegradable plastics applied to soil stimulate the production of greenhouse gases and inhibit plant growth under aerobic conditions. This study aimed to examine the effects of biodegradable plastics on paddy rice growth and greenhouse gas emission under flooding conditions in pot experiments and also on greenhouse gas production under flooding conditions in an incubation experiment. Two series of pot experiments were conducted with rice (Oryza sativa). First series as immediate flooded and 2nd series as 2 weeks nonflooding before flooded, and both kept flooded until harvest. The following four kinds of materials were added to the sandy paddy soil, (1) nonwoven fabric sheets made of polylactic acid and polybutylene-succinate, (2) laminate sheets made of polybutylene adipate terephthalate and pulp, (3) cellulose filter paper, and (4) rice straw. Only soil was used as control. Methane (CH4) emission, measured by chamber method followed by gas chromatography, was significantly larger only in the cellulose treatment than the laminate treatment in the immediate flooded series, indicating that biodegradable plastics had no significant impact on CH4 emission from paddy rice soil. Rice growth and yield did not show significant difference among treatments in both series. Incubation experiment showed the largest CH4 production in cellulose-amended soil, followed by straw-amended and laminate amended soils, and least in fabric-amended soil, while CO2 did not show significant differences among treatments. We need further examination with different biodegradable plastics for a longer period that test used in this study.
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Effects of land-use and organic fertilization on soil enzyme in a farmer’s fields Reviewed
Silvio Yoshiharu Ushiwata, Ayana Kawashima, Hiroyuki Oshima, Taku Kato, Miwa Yashima, and Kazuyuki Inubushi
78 ( 1 ) 20 - 25 2024.01
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)
The soil quality is measured through the use of indicators that measure or reflect the environmental status or sustainability condition of the ecosystem. Microbial attributes are classified as biological indicators. The use of these indicators in the soil analysis routine are promising. In this research, the effect of two land uses (paddy or upland field) with two different soil management (conventional system or conventional system with previous organic matter applied) on soil microbial properties was evaluated in a farmer’s field. The soil enzymatic activities (urease, glucosidase and arylsulfatase),with exception of acid phosphatase, showed sensitive and consistent responses to the effect of soil management. The results showed higher soil enzymatic activity in paddy than upland field. Total C and N were 1.3–1.8 times increased by organic amendments as well as N mineralization 1.8–2.4 times, while enzyme activities in upland soil 1.5–2.4 times, although 0.7–1.3 times in paddy soil. In both land-uses, the large amount of organic fertilizer applications in previous organic amendments contributed to improve the soil chemical properties and soil microbiological activities.
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KATO Taku, OHSHIMA Hiroyuki, MAEDA Yoshiyuki, INUBUSHI Kazuyuki
Ningen to kankyo 49 ( 3 ) 2 - 8 2023.10
Language：Japanese Publisher：Japan Association on the Environmental Studies
<p>Studies have shown that humic substances in soil organic matter have various functionalities. In this study, we focused on water-soluble organic components, such as dissolved organic matter (DOM), and applied the method proposed by Tsuda et al. (2016), which has been used to analyze water-extractable humic substances (WEHS) in DOM in lakes, to soil samples for the first time to quantify WEHS in farmlands. The amount of WEHS in agricultural soils in Kanagawa Prefecture was found to be proportional to the amount of water extracted organic matter (WEOM) for the first time in this study. The amount of WEOM was generally higher in the crop layer than in the next surface layer immediately below the crop layer; the same trend was observed for WEHS. The amount of WEHS in WEOM varied greatly among various study sites. However, the percentage of WEHS showed a strong positive correlation between the cultivated and next surface layers. These results indicate that the total amount of soil organic matter influences the amount of WEOM and the amount of WEHS in WEOM. Moreover, the nitrogen in WEOM was found to be mainly present in non-WEHS and almost WEHS. The high positive correlation between the amounts of carbon and nitrogen in WEHS shows that the nitrogen compounds present in WEHS are chemical structures that are constrained to some extent.</p>
Books and Other Publications 【 display / non-display 】
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東日本田尾震災からの農業復興支援モデル
大島宏行、稲垣開生、後藤逸男（ Role： Joint author）
ぎょうせい 2021.03 （ ISBN:978-324-80108-6 ）
Total pages：269 Responsible for pages：96－117 Language：Japanese Book type：General book, introductory book for general audience
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最新農業技術『土壌施肥 vol.9』
大島宏行（ Role： Joint author , レタス根腐病の発病抑止土壌おとび抑止メカニズムと施肥リン酸の影響）
農文協 2017.03
Total pages：98 Responsible for pages：14-19 Language：Japanese
レタス根腐病（原因菌Fusarium oxysporum）の発病抑止土壌および発病抑止メカニズムと施肥リン酸の影響について紹介した。
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現代農業
大島 宏行（ Role： Contributor）
農文協 2018.10
Total pages：346 Responsible for pages：214-215 Language：English
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Development and Demonstration of Reduction Techniques on Fusarium yellows of Celery
（ Role： Joint author）
2016.04
Language：Japanese
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転炉スラグによる土壌pH矯正を核としたフザリウム性土壌病害の耕種的防除技術の開発
門田育生、後藤逸男、大島宏行 他（ Role： Joint author）
農研機構東北農業研究センター 2015.03
Language：Japanese
Other External Funds 【 display / non-display 】
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平成28年度品目別輸出促進緊急対策事業のうち農産物輸出コスト低減対策特別支援事業
2016.12 - 2017.12
農林水産省
全国肥料商連合会
Authorship：Coinvestigator(s) Grant type：Competitive
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現代人の栄養代謝を改善する新しい「栄養強化米」の開発と実用化
2018.04 - 2021.03
東京農業大学
本間 和宏
Authorship：Coinvestigator(s) Grant type：Competitive
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津波・放射能汚染からの農地・森林・営農の迅速・効率的な復興方法の解明
2016.04
東京農業大学総合研究所
渋谷往男
Authorship：Coinvestigator(s) Grant type：Competitive
Past of Commissioned Research 【 display / non-display 】
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転炉スラグの農業利用に関する研究
2016.09
産業振興株式会社 一般受託研究 The General Consignment Study
本研究では、転炉スラグ施用量決定方法の簡便化の検討および現地実証試験での土壌病害防除効果の検証試験を行い、転炉スラグの農業利用率向上を目指す。
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大麦を含む輪作体系における緑肥及び炭を用いた環境再生農業技術の検証に関する研究
2023.04
受託研究 The General Consignment Study
Authorship：Principal investigator
Grant amount：\1000000
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研究課題名 水田・畑作における製鋼スラグ肥料の効果検証に関する研究
2023.04 - 2024.03
受託研究 The General Consignment Study
Authorship：Principal investigator
Grant amount：\2000000
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製鋼スラグ中のCaの溶媒抽出を用いた CO2固定化プロセスの技術開発
2021.04 - 2023.03
受託研究 The General Consignment Study
Authorship：Coinvestigator(s)
Grant amount：\6000000
Presentations 【 display / non-display 】
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3 鉄分を多く含む栄養強化米の選抜（関東支部講演会 2020年度支部講演会）
齋藤 彰宏, 市ノ川 裕美, 熊野 順也, 小鹿 幸帆, 中村 健人, 東元 新, 島田 圭, 加藤 舞, 大島 宏行, 大山 卓爾, 樋口 恭子
日本土壌肥料学会関東支部大会 2021.09
Event date： 2021.11
Language：Japanese Presentation type：Oral presentation (general)
Venue：埼玉県
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23 ダイズに深層施肥した窒素肥料の動態（関東支部講演会，2019年度各支部会）
大山 卓爾, 池邉 慧祐, 西浦 拓也, 樋口 恭子, 齋藤 彰宏, 大島 宏行, 加藤 拓, 前田 良之
日本土壌肥料学会関東支部大会 2020.09
Event date： 2019.11
Language：Japanese Presentation type：Oral presentation (general)
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50年間の茶畑利用が土壌中における各種元素の空間分布に及ぼす影響
加藤拓, 稲葉徳利, 大島宏行, 前田良之
日本土壌肥料学会宮城大会 2017.09
Event date： 2017.09
Language：Japanese Presentation type：Oral presentation (general)
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福島県伊達市における畑ワサビへの放射性セシウム吸収抑制対策(その1)
稲垣開生, 前原瞳, 大島宏行, 数又清市,後藤逸男
日本土壌肥料学会佐賀大会 2016.09
Event date： 2016.09
Language：Japanese Presentation type：Oral presentation (general)
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福島県伊達市における畑ワサビへの放射性セシウム吸収抑制対策(その2)
大島宏行,稲垣開生,小林智之, 数又清市,後藤逸男
日本土壌肥料学会佐賀大会 2016.09 日本土壌肥料学会
Event date： 2016.09
Language：English Presentation type：Oral presentation (general)
Teaching Experience 【 display / non-display 】
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分析化学演習
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有機化学・無機化学
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無機化学実験
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無機化学２
Basic stance of industry-university cooperation 【 display / non-display 】
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教育の一端になることを原則として進める。
Attractiveness of Research 【 display / non-display 】
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土や肥料、植物をとことん科学しましょう。