Response of rice and soil to the application of rare earth elements

摘要：

Low dose of lanthanum (La) (0.05-1.5 mg·L<-1>) significantly increased rice production in nutrient solution culture experiment, but no significant effect was found in soil culture, either by glasshouse pot or field experiments. The enhancement is probably attributed to the plant hormones adjustment. La application increased the La content in rice root and straw, but did not change the concentration in seeds. Calcium was decreased in the rice straw and seed. Phosphorus was increased in the rice root and mainly existed as inorganic and chelate compounds. Application of La led to the increases of exchangeable La and Al in soil, which were more significant in the red soil than in the paddy soil. The long-term application of lanthanum would lead to the leaching of soil Ca, Mg, K and Na. It should not be encouraged for the application in agriculture.

关键词： rare earth lanthanum rice soil fertility risk evaluation

作者: Zubin Xie Jianguo Zhu Zihong Cao

作者单位: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 20008

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: 35-36

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）