| Co-Investigator(Kenkyū-buntansha) |
田中 貴 岐阜大学, 応用生物科学部, 助教 (20805436)
縄田 栄治 京都大学, 農学研究科, 教授 (30144348)
井上 博茂 京都大学, 農学研究科, 講師 (40260616)
間藤 徹 京都大学, 農学研究科, 教授 (50157393)
廣岡 博之 京都大学, 農学研究科, 教授 (60192720)
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| Budget Amount *help |
¥42,380,000 (Direct Cost: ¥32,600,000、Indirect Cost: ¥9,780,000)
Fiscal Year 2018: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
Fiscal Year 2017: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
Fiscal Year 2016: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
Fiscal Year 2015: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
Fiscal Year 2014: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
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| Outline of Final Research Achievements |
This study was performed in the intensive agricultural region in the coastal area of southeast Lake Dianchi, Yunnan province, China. (1) Overuse of chemical fertilizer and/or manure in agriculture is a principal factor in water eutrophication. (2) Reducing chemical fertilizer input effectively decreased the soil nitrogen, phosphorus, and potassium in an intensive vegetable cropping system. (3) Reducing N input of chemical fertilizer did not decrease total N absorption or dry matter production in high level of soil nitrate. (4) Timing of harvest affects the subsequent canopy structure of Phragmites australis in constructed wetlands, and its nutritive value of roughage.
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