2013 Fiscal Year Final Research Report
Evaluation of the present situation of the environmental impact in the intensive agriculture, and it's restoration at the inland of Western China
| Project/Area Number |
21255007
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 海外学術 |
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| Research Field |
Crop science/Weed science
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| Research Institution | Kyoto University |
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Principal Investigator |
INAMURA Tatsuya 京都大学, (連合)農学研究科(研究院), 教授 (00263129)
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| Co-Investigator(Kenkyū-buntansha) |
MATOU Tooru 京都大学, 大学院・農学研究科, 教授 (50157393)
NAWATA Eiji 京都大学, 大学院・農学研究科, 教授 (30144348)
HIROOKA Hiroyuki 京都大学, 大学院・農学研究科, 教授 (60192720)
INOUE Hiromo 京都大学, 大学院・農学研究科, 講師 (40260616)
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| Project Period (FY) |
2009-04-01 – 2014-03-31
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| Keywords | 環境 / 作物生産 / 化学肥料 / 家畜糞 |
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| Research Abstract |
This study was performed in the intensive agricultural region in the coastal area of southeast Lake Dianchi, Yunnan province, China. (1) Most farmers cultivated six or seven crops per year. This very high cropping intensity is based on the combination of vegetables with a short growing duration and transplanting culture. However, the amount of applied nutrient exceeds crops demand in many intensive cropping fields. (2) The concentrations of N, P, and K in soil increase to a larger extent with input of N, P, and K from chemical fertilizers than from manure. Reducing the input of N, P, and K would be more efficient than increasing their output for restoration of the environmental impact. (3) In constructed wetland, harvest of reed affects the aboveground regrowth and nitrification and denitrification activity of the root mat.
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