农业环境科学学报Issue(2)：288-293,6.DOI:10.11654/jaes.2016.02.012
不同镉浓度下绿穗苋根际环境特征与镉形态分布
Characteristics and Cd fractions of rhizospheric soil of Amaranthus hybridus L. under different cadmium concentrations
摘要
Abstract
Amaranthus hybridus L. is Cd-tolerant plant. Here a pot experiment was carried out to investigate the effects of cadmium(Cd) stresses on the characteristics and Cd fractions of A . hybridus rhizospheric soil. Results showed that pH in the rhizospheric soil was lower than that in non-rhizospheric soil, while dissolved organic carbon(DOC)concentrations and catalase, urease and phosphatase activities were just opposite. Increasing Cd concentrations reduced pH and catalase activity, but increased DOC concentrations. With Cd concentra-tions increasing, exchangeable Cd fraction was increased, while iron and manganese oxides bound Cd fraction was decreased initially but in-creased later. Carbonates bound, organic matter bound and residual Cd fractions were all decreased. These results suggest that pH and DOC in rhizospheric soil of A . hybridus could be an important factor influencing the distribution of Cd fractions, and enzymatic activities in the rhizospheric soil could play a role in mitigating Cd toxicity.关键词
根际环境/DOC/Cd形态/土壤酶活性Key words
rhizosphere/DOC/Cd fraction/soil enzyme activities分类
资源环境引用本文复制引用
邓玉兰,徐小逊,张世熔,蒲玉琳,张驰强,霍庆霖,董袁媛..不同镉浓度下绿穗苋根际环境特征与镉形态分布[J].农业环境科学学报,2016,(2):288-293,6.基金项目
国家自然科学基金（41401328）；四川省烟草专卖局2015年科技计划项目---植烟土壤质量提升关键技术研究与集成应用 （）
