2013 Fiscal Year Final Research Report
Relationship between crop growth and nutrition and N2O emission or soil microbial community by green manure incorporation
| Project/Area Number |
23780017
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Crop science/Weed science
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| Research Institution | Osaka Prefecture University |
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Principal Investigator |
MATSUMURA Atsushi 大阪府立大学, 生命環境科学研究科(系), 助教 (30463269)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 亜酸化窒素 / 温室効果ガス / 二酸化炭素 / 土壌微生物バイオマス / 土壌微生物相 / 緑肥作物 / 炭施用 |
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| Research Abstract |
Nitrous oxide (N2O) emissions and the change of microbial biomass and their community by green manure incorporation was investigated. Further studies on different green input method (incorporation or mulching) and biochar application were conducted to reduce the N2O emmision. N2O emission was high when easily decomposed green manure (low CN ratio) was incorporated, and gram negative bacteria biomass was positively correlated to N2O emission. Mulch treatment reduced N2O emission compared with incorporation method. Biochar treatment clearly reduced N2O emission. One of the reason for this N2O reduction by biochar was thought to be due to microbial community change i.e. biochar treatment decreased gram negative bacteria while increased fungi.
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