| Project/Area Number |
23580464
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Boundary agriculture
|
|---|
| Research Institution | National Institute for Agro-Environmental Sciences |
|---|
Principal Investigator |
OKADA Hiroaki 独立行政法人農業環境技術研究所, 生物生態機能研究領域, 主任研究員 (30355333)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
HASEGAWA Toshihiro 農業環境技術研究所, 生物生態機能研究領 域, 上席研究員 (10228455)
TOKIDA Takeshi 農業環境技術研究所, 物質循環研究領域, 任期付研究員 (20585856)
MATUSHIMA Miwa 千葉大学, 園芸学研究科, 助教 (60527927)
|
|---|
| Project Period (FY) |
2011 – 2013
|
| Project Status |
Completed (Fiscal Year 2013)
|
| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2013: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2011: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
|
|---|
| Keywords | 地球温暖化 / CO2濃度 / 温度 / 水田生態系 / 土壌 / 線虫 / 水稲 / 微生物 |
|---|
| Research Abstract |
We examined from May to August in 2011 and 2012, rice root, microbial and nematode densities in surface soil in paddy field, where CO2 concentration and/or temperature were elevated to evaluate how climate change 50 years later could affect paddy soil food web. Rice root density tended to increase as CO2 and temperature elevated, although the significance was not consistent. Microbial density (total DNA extracted from soil) was significantly reduced by elevated temperature. Densities of rice root nematodes and fungal feeding nematodes were consistently reduced by elevated temperature as well. In conclusion, elevated temperature negatively affected soil microbes and animals, whereas effect of elevated CO2 was small or unclear.
|
