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| Ecological Effects of herbicide mesotrione on soil microbial communities |
| SUN Yue-bing1,2, WANG Run-long2,3, XU Ying-ming1,2, LIANG Xue-feng1,2, WANG Lin1,2, ZHANG Gui-long1 |
1. Key Laboratory of Original Environmental Quality, Ministry of Agriculture, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China;
2. Tianjin Key Laborary of Agro-Environment and Agro-Product, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China;
3. College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China |
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Abstract The influence of mesotrione on soil enzyme activities and microbial community functional diversity in soils were investigated. The results showed that the activities of catalase and invertase first enhanced and then decreased with the increase of the concentration of mesotrione, while catalase and invertase activities under different treatments of mesotrione were higher than those of the control soil, resulting in from 22.6% to 41.0% and from 3.4% to 54.2%, respectively, increase when compared with CK. By contrast, urease activity was suffering from 12.0% to 18.6% reduction in comparison with the control, but there was no significantly different among the treatments of 0~100mg/kg mesotrione. The application of mesotrione inspired the activity of microbial community, and the abundance, diversity and evenness of soil microbial community were increased in soil. The values of average well color development (AWCD) and variation rate increased with increasing of mesotrione. Meanwhile, the utilization efficiency of carbohydrate, amino acid, polymer, aamine, carboxylic acid phenolic acid by soil microorganisms were increased as a whole, with the maximum of 5.3, 1.0, 4.4, 3.2, 0.2 and 6.8 times in contrast with the control group, but there were certain differences in the type of utilizing carbon by soil microbes under a serial contents of mesotrione.
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Received: 25 May 2015
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