| 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)
森塚 直樹 京都大学, (連合)農学研究科(研究院), 助教 (10554975)
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| Budget Amount *help |
¥47,710,000 (Direct Cost: ¥36,700,000、Indirect Cost: ¥11,010,000)
Fiscal Year 2013: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2012: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
Fiscal Year 2011: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
Fiscal Year 2010: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
Fiscal Year 2009: ¥15,990,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥3,690,000)
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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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