您好，欢迎访问四川省农业科学院 机构知识库！

Cadmium uptake by paddy rice and soil available Cd under water flooding as affected by nitrogen fertilizer

文献类型： 会议论文

第一作者： QIN Yu-sheng

作者： QIN Yu-sheng 1 ; WANG Zheng-yin 1 ; JIAKA La-tie 2 ; TU Shi-hua 2 ;

作者机构： 1.College of Resources and Environment, Southwest University

2.Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences

关键词： Nitrogen fertilizer;Paddy rice;Soil available cadmium;Cadmium uptake

会议名称： International Conference on Bioinformatics and Biomedical Engineering (iCBBE 2010)

主办单位：

页码： 4028-4032

摘要： In order to tackle the problem of Cd pollution in paddy soils and investigate soil available Cd as affected by nitrogen fertilizers, incubation and pot experiments were carried out to study effects of different nitrogen fertilizers and rates of urea on cadmium uptake by paddy rice and soil available Cd under water flooding condition. Results revealed that soil pH increased sharply after the soil was flooded, especially at the beginning of incubation, and gradually decreased with incubation time and finally tended to approach the neutral values. The patterns of soil pH change were just opposite to those of soil available Cd, a negative correlation observed between the two. Soil flooding made the soil available Cd drop by 58.2%-84.1%. Among 4 nitrogen fertilizers, the NH_4Cl treatment significantly increased Cd content in rice more than the other three treatments including urea, (NH_4)_2SO_4 and NH_4NO_3 and facilitated transfer of Cd from rice straw to grains; there was no significant difference in Cd contents in both straw and grains between the latter three nitrogen treatments. Optimal rate (N 0.2 g·kg~(-1)) of urea could significantly lower the Cd concentration in rice grains, while either no N or high rate of urea treatment significantly enhanced the Cd concentration in grains. Results further revealed that on the Cd contaminated paddy soil, employing a Cd resistant rice cultivar in combination with optimized fertilizer and water management practices could lower the Cd content in rice grains far below the maximum permissible level of 0.2 mg·Cd kg~(-1) set by the state for the pollution-free rice production.

分类号： G202-53

  • 相关文献

[1]Cadmium uptake by paddy rice and soil available Cd under water flooding as affected by nitrogen fertilizer. Wang Zheng-yin,Qin Yu-sheng,Jiaka La-tie,Tu Shi-hua. 2010

作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：四川省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台