| Project/Area Number |
22405020
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 海外学術 |
|---|
| Research Field |
Plant nutrition/Soil science
|
|---|
| Research Institution | Kyoto University |
|---|
Principal Investigator |
SHINJO Hitoshi 京都大学, 地球環境学堂, 准教授 (70359826)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
TANAKA Ueru 総合地球環境学研究所, 研究部, 准教授 (10231408)
IKAZAKI Kenta 首都大学東京, 都市環境科学研究科, 助教 (70582021)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
TOBITA Satoshi 国際農林水産業研究センター, 生産環境領域, 主任研究員(当時) (30450266)
|
|---|
| Project Period (FY) |
2010-04-01 – 2014-03-31
|
| Project Status |
Completed (Fiscal Year 2013)
|
| Budget Amount *help |
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2012: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2011: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2010: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
|
|---|
| Keywords | サヘル / 緑の革命 / 耕地生態系 / トウジンビエ / 耕地内休閑 / 砂漠化 / ニジェール：ナミビア / ニジェール / 土壌肥沃度 / 耕地内休閑システム |
|---|
| Research Abstract |
In semiarid area extending in the southern periphery of the Sahara Desert with the annual precipitation of about 400-800 mm, serious environmental degradation due to poverty known as desertification prevails. In this research, we evaluated soil management practices that can combat desertification from the viewpoint of not only productivity but sustainability based on nutrient budget. We found that chemical fertilizer application could increase the productivity as well as alleviate impact of drought. However, in the conventional practice that removes crop residues from a field for animal feed or building materials, a little fertilization may even accelerate nutrient mining of soils. Thus, even in the case of fertilization, crop residue management plays a key role in sustainability of soils.
|
