农业资源与环境学报2017，Vol.34Issue(3)：272-279,8.DOI:10.13254/j.jare.2017.0035
稻米镉关键积累时期研究
The Key Period of Cadmium Accumulation in Rice
摘要
Abstract
It has important scientific value and practical significance to explore the characteristics of the cadmium accumulation in rice at different growth stages for safely producing rice.In this study,cadmium accumulation in rice at different growth periods,cadmium distribution in different parts of the rice and the intrinsic relationship between them were investigated by water culture experiment with low concentration of exogenous cadmium addition at different growth stages of rice.The cadmium could accumulate at a relatively high content at booting and heading stage of rice after exposure to exogenous cadmium indicating that the booting and heading stage were the key period of cadmium accumulation in rice.At the heading stage,the cadmium stress had the most significant effect on the cadmium accumulation rate of rice,reaching a maximum of 3.41 μg·clump-1· d-1.The contributions of cadmium stress to the cadmium accumulation in the booting and heading stage were higher.In those two stages,the contributions rate of the Zhong Jiazao 17 was 40.51％,31.66％ and the Xiang Wanxian 13 was 37.97％,35.46％ respectively.The study could provide valuable implications for control of cadmium pollution in rice field.关键词
水稻/镉/营养液培养/生育期/积累速率Key words
rice/cadmium/solution culture/growth stage/accumulation rate分类
资源环境引用本文复制引用
彭鸥,铁柏清,叶长城,张淼,刘孝利,魏祥东,孙健..稻米镉关键积累时期研究[J].农业资源与环境学报,2017,34(3):272-279,8.基金项目
农业部、财政部专项"Cd超标灌溉水净化技术集成与示范"(20160606) （20160606）
湖南省重点研发计划"湖南Cd超标农田安全利用关键技术研究"(2015NK3015) （2015NK3015）
湖南省政府重大专项"稻米Cd污染控制技术研究与示范"(20130101) （20130101）
