安徽农业大学学报2017，Vol.44Issue(4)：726-731,6.DOI:10.13610/j.cnki.1672-352x.20170811.008
硒酸钠添加下苗期水稻中硒-汞的分布特征
Distribution characteristics of selenium and mercury in seedling rice under selenate fortification
摘要
Abstract
An experiment was conducted to evaluate the bioaccumulation and interaction of selenium (Se) and mercury (Hg) in seedling rice via an indoor pot experiment.The germinated seedling rice was exposed to three different levels of Se as Na2SeO4 (0,1 and 5 mg·kg-1) and Hg as HgSO4 (0,0.5 and 1 mg·kg-1) for 3 weeks.The results showed that the Hg concentration in shoots tended to decrease with increased Se concentration,and the Hg concentration in roots decreased by 36.8 ％ when the Se concentration was 5 mg·kg-1 compared with the no Se group.Moreover,Hg,in a certain extent,promoted the uptake and accumulation of Se in seedling rice at low concentrations,and the Se contens in seedling rice was 20.12 times higher than those of no Hg group when the exogenous Hg concentration was 1 mg.kg-1.Overall,a negative relationship was observed between the bioaccumulation factors (BAF) of Se and Hg in shoots,and the possible reason might be the formation of Se-Hg complex and block the uptake of Hg to shoots.The present findings could provide data basis to relieve the accumulation of Hg via Na2SeO4 fertilizer during seedling.关键词
硒/汞/苗期水稻/分布特征Key words
selenium (Se)/mercury (Hg)/seedling rice/distribution characteristics分类
农业科技引用本文复制引用
贺宇,袁林喜,汤杰夫,尹雪斌..硒酸钠添加下苗期水稻中硒-汞的分布特征[J].安徽农业大学学报,2017,44(4):726-731,6.基金项目
国家青年自然科学基金(NNSFC31400091),中国科学技术大学先进技术研究院技术创新项目(2013-1-6),江苏省青年自然科学基金(BK2012195,BK2012202)共同资助. （NNSFC31400091）
