Clarification of nitrogen dynamics in paddy fields in Vietnam

越南稻田氮动态的澄清

• 批准号: 19405024
• 负责人: WATANABE Takeshi
• 金额: $ 3.74万
• 依托单位: Japan International Research Center for Agricultural Sciences
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2007
• 资助国家: 日本
• 起止时间: 2007 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19405024/
• 关键词: 環境調和型農林水産; 土壌学; 環境

The nitrogen (N) losses from paddy field by ammonia volatilization were measured in 3 sites. The losses were 10.3kg ha^<-1> in average and equivalent to 11.4% of applied N fertilizer. Destinations of the applied N fertilizer were monitored at 2 sites in northern Vietnam. The gap between applied N fertilizer (94kg ha^<-1> in average) and sum of N recovered in rice plant and soil (0-25cm) and volatilized ammonia was 34.5kg ha^<-1>. It seemed that most of the gap was caused by N losses by denitrification and leaching.

在3个试验点测定了稻田氨挥发损失的氮素。平均损失10.3kg ha^<-1>，占施氮量的11.4%。在越南北方的2个地点监测施用氮肥的目的地。施氮量（平均94 kg ha^<-1>）与水稻植株和土壤（0- 25 cm）中回收的氮素和挥发氨之和的差距为34.5kg ha^<-1>。这表明，大部分的差距是由反硝化和淋溶造成的。

项目成果

ベトナムの水田におけるアンモニア揮散の測定と水田の窒素収支

越南稻田氨挥发和氮平衡测量

• 发表时间: 2008
• 作者: Takeshi Watanabe;Tran T Son;他5名;Takeshi Watanabe;渡辺武
• 通讯作者: 渡辺武

Measurement of ammonia volatilization from flooded paddy fields in Vietnam

• DOI: 10.1111/j.1747-0765.2009.00419.x
• 发表时间: 2009-12
• 期刊: Soil Science and Plant Nutrition
• 影响因子: 2
• 作者: Takeshi Watanabe;T. T. Son-T.;N. N. Hung-N.;Nguyen van Truong;T. Q. Giàu;K. Hayashi;O. Ito