| Project/Area Number |
16K18663
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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 |
Plant nutrition/Soil science
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Project Period (FY) |
2016-04-01 – 2018-03-31
|
| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2017: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | 土壌微生物 / 窒素循環 / 残さ / 土壌肥沃度 / 地力 / 窒素有機化 / 窒素無機化 / 有機化 / 無機化 / 微生物 / 分解 |
|---|
| Outline of Final Research Achievements |
To evaluate soil fertility, changes in soil microbial communities before and after the application of organic matter were evaluated. First, the comparison between organically farmed and conventionally farmed soil was performed. We used rice straw as an organic matter. In the next experiment, we evaluated using one soil but with different organic matter sources. We showed that the timing and application rates of soil organic matter were critically important in controlling soil microbial communities. To evaluate nitrogen cycle, we also investigated the flow of ammonium-nitrogen and nitrate-nitrogen. Interestingly, the flow and soil microbial community structures were correlated in one experiment but not for the other. Further studies are needed to research the mechanisms behind the different results.
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