Uptake of Cadmium from <113>Cd-Labeled Fertilizer by Rice Plants

摘要：

We elucidated the Cd balance derived from fertilizers in paddy fields by using <113>Cd-labeled fertilizer (N:P:K=10:4.4:8.3;<113>Cd content=89mg·kg<-1>). The Cd input from the labeled fertilizer was 89 g·ha<-1>. The uptake of fertilizer-derived Cd by the aerial parts of the rice plants was 0.35g· ha<-1>. Only 0.39％ of the total Cd input to the soil was absorbed by the rice plants. Therefore, the Cd concentration in the aerial parts of rice plants is not likely to be affected by the regular application of fertilizer, because the Cd input from regular compound fertilizer, which has a Cd concentration of approximately 2mg·kg<-1> (less than 1/40th of that of the labeled fertilizer used in this experiment), would be only about 2g·ha<-1>. The Cd concentration profile in the soil revealed that the fertilizer-derived Cd accumulated in the surface soil and very little of it transferred to lower layers.

关键词： cadmium rice stable isotope fertilizer field experiment

作者: A. Kawasaki T. Arao S. Yada H. Oda

作者单位: National Institute for Agro-Environmental Sciences, Tsukuba, 305-8604, Japan National Institute for Agro-Environmental Sciences, Tsukuba, 305-8604, Japan Eisai Seikaken Co., Ltd

会议类型: 国际会议

会议名称: 第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)

会议地点: 北京

会议语种:英文

页码: 980-981

在线出版日期: 2007-07-15（万方平台首次上网日期，不代表论文的发表时间）