Discriminating multiple impacts of biogas residues amendment in selectively decontaminating chloroacetanilide herbicides.

Xiyun Cai, Lili Niu, Yu Zhang, Xianming Lang, Yunlong Yu, Jingwen Chen

Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.

Journal of agricultural and food chemistry 2011 Oct 26

filter terms:

There is increasing concern about modifications to pesticide persistence in soil from the application of organic wastes as fertilizers. This study was conducted to discriminate the multiple effects of biogas residues (BR) amendment, including soil nutrients, soil microbial activity and biodiversity, and adsorption and degradation of chloroacetanilide herbicides (acetochlor, metolachlor, and butachlor). Addition of BR to soil increased the release of organic materials (i.e., dissolved organic carbon, dissolved organic nitrogen, and active phosphorus). It not only stimulated soil microorganisms and caused changes to microorganism diversity but also increased herbicide adsorption. Such multiple effects led to selective decontamination of chloroacetanilide herbicides, depending on herbicide structures and BR amendment levels. Stereoselectivity in degradation of acetochlor and metolachlor with biphasic character was magnified by BR amendment, which was well explained by integrating the impacts of BR amendment. Interestingly, BR amendment induced significant accumulation of herbicidally active aS,CS-metolachlor, facilitating the utilization of herbicidal activity.

Citation

Xiyun Cai, Lili Niu, Yu Zhang, Xianming Lang, Yunlong Yu, Jingwen Chen. Discriminating multiple impacts of biogas residues amendment in selectively decontaminating chloroacetanilide herbicides. Journal of agricultural and food chemistry. 2011 Oct 26;59(20):11177-85