Soil enzymatic activities and microbial community structure with different application rates of Cd and Pb

查看全文 作　　者：KHAN [1,2]Sardar;CAO [1]Qing;HESHAM Abd El-[1]Latif;XIA [1]Yue;HE Ji-[1]zheng

机构地区：[1]Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Belting 100085, China.;[2]Department of Environmental Sciences, University of Peshawar, 25120 Peshawar, Pakistan

出　　处：《Journal of Environmental Sciences》索引2007年第19卷第7期,共7页

基　　金：Project supported by the Key Project of Chinese Academy of Sciences(No. KZCX3-SW-431, KZCX2-YW-408);the National Natural Sci-ence Foundation of China (No. 40321101, 40571082). 摘　　要：This study focused on the changes of soil microbial diversity and potential inhibitory effects of heavy metals on soil enzymatic activities at different application rates of Cd andor Pb. The soil used for experiments was collected from Beijing and classified as endoaquepts. Pots containing 500 g of the soil with different Cd andor Pb application rates were incubated for a period of 0, 2, 9, 12 weeks in a glasshouse and the soil samples were analyzed for individual enzymes, including catalase, alkaline phosphatase and dehydrogenase, and the changes of microbial community structure. Results showed that heavy metals slightly inhibited the enzymatic activities in all the samples spiked with heavy metals. The extent of inhibition increased significantly with increasing level of heavy metals, and varied with the incubation periods. The soil bacterial community structure, as determined by polymerase chain reaction-denaturing gradient gel electrophoresis techniques, was different in the contaminated samples as compared to the control. The highest community change was observed in the samples amended with high level of Cd. Positive correlations were observed among the three enzymatic activities, but negative correlations were found between the amounts of the heavy metals and the enzymatic activities. 关键词：镉铅土壤酶酶活性微生物群落群落结构土壤污染重金属污染

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Soil enzymatic activities and microbial community structure with different application rates of Cd and Pb

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