Degradation of Herbicides Atrazine and Bentazone Applied Alone and in Combination in Soils
Degradation of Herbicides Atrazine and Bentazone Applied Alone and in Combination in Soils作者机构：Department of Chemistry Northwest University Xi＇an 710069 （China） Department of Chemistry Shaanxi Institute of Education Xi＇an 710061 （China） Chemical Engineering and Materials Science Zhejiang University of Technology Hangzhou 310032 （China） Research Center of Green Chirality College of Biological and Environmental Engineering Zhejiang University of Technology Hangzhou 310032 （China）
出 版 物：《Pedosphere》 (土壤圈（英文版）)
年 卷 期：2008年第18卷第2期
页 面：265-272页
核心收录：
学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学]
基 金：the Natural Science Basic Research Plan in Shaanxi Province of China(No.2004K03-G3) the Scientific Research Fund of the Department of Education of Shaanxi ProvinceChina(No.04JK234)
主 题：atrazine bentazone degradation herbicide combination
摘 要：The application of a mixture of bentazone(3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-one-2,2-dioxide)and atrazine (6-chloro-N2-ethyl-N4-isopropyl-1,3,5-triazine-2,4-diamine)is a practical approach to enhance the herbicidal ***- ratory incubation experiments were performed to study the degradation of bentazone and atrazine applied in combination and individually in maize rhizosphere and non-rhizosphere *** a lag phase,the degradation of each individual herbicide in the non-autoclaved soil could be adequately described using a first-order kinetic *** a 30-d in- cubation,in the autoclaved rhizosphere soil,bentazone and atrazine did not noticeably degrade,but in the non-autoclaved soil,they rapidly degraded in both non-rhizosphere and rhizosphere soils with half-lives of 19.9 and 20.2 d for bentazone and 29.1 and 25.7 d for atrazine,*** rhizosphere effect significantly enhanced the degradation of atrazine, but had no significant effect on *** results indicated that biological degradation accounted for the degrada- tion of both herbicides in the *** compared with the degradation of the herbicide applied alone,the degradation rates of the herbicides applied in combination in the soils were lower and the lag phase *** the addition of a surfactant,Tween-20,a reduced lag phase of degradation was observed for both herbicides applied in combination. The degradation rate of bentazone accelerated,whereas that of atrazine remained nearly ***,when these two herbicides were used simultaneously,their persistence in the soil was generally prolonged,and the environmental contamination potential increased.
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