The effect of imazethapyr on soil microbes in soybean fields in northeast China

文献类型： 外文期刊

第一作者： Zhang, Changpeng

作者： Zhang, Changpeng;Liu, Xingang;Dong, Fengshou;Xu, Jun;Zheng, Yongquan

作者机构：

关键词： imazethapyr;herbicide residue;soil microbial biomass;phospholipid fatty acid;microbial community structure

期刊名称：CHEMISTRY AND ECOLOGY （ 影响因子：2.244； 五年影响因子：1.933 ）

ISSN：

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收录情况： SCI

摘要： Large quantities of herbicides are used on agricultural soils, but the effects of herbicides on the structure of the soil microbial community have not been well investigated. In this study, soil from three soybean fields was investigated. The herbicide imazethapyr was applied in one year to soil 1 and in two sequential years to soil 2. Control soil received no imazethapyr. Microbial biomass and community structure were characterised using chloroform fumigation-extraction and phospholipid fatty acid (PLFA) determination. The imazethapyr residue was 1.62 μg·kg~(-1) in soil 1 and 1.79 μg·kg~(-1) in soil 2. The microbial biomass carbon and total PLFAs for soil 2 were much higher than for the other soils. PLFA profiles showed that fatty acids for Gram-negative and Gram-positive bacteria, as well as total bacteria and total fungi in soil 2 were higher than in other samples. Principal component analysis of the PLFAs showed that the structure of the microbial community differed substantially among the three different soybean field soils. Application of the herbicide imazethapyr to soybean fields clearly changed the soil microbial biomass and shifted the structure of the microbial community.

分类号： O6

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