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当前位置: 首页 > 文章 > 2,4-D在厌氧条件下土壤中的降解 东北农业科学 2012,37 (4) 32-34+37
Position: Home > Articles > Degradation of the Herbicide 2,4-D in Anaerobic Soil Conditions Journal of Northeast Agricultural Sciences 2012,37 (4) 32-34+37

2,4-D在厌氧条件下土壤中的降解

作  者：
王翔;郭健;张恒星;马腾达;张浩;王国林
单  位：
63850部队后勤部;吉林农业大学资源与环境学院;陕西省西安热力研究院有限公司
关键词：
2,4-D;厌氧条件;淹水土壤;矿化作用
摘  要：
2,4-二氯苯氧酸(2,4-D)是一种世界上广泛应用的除草剂,能够存在于多种土壤环境中,但在某些厌氧条件下会被降解转化。本实验研究了2,4-D在棕壤和黑钙土两种不同土壤中的降解速率及CO2的释放。在两种土壤中分别加入质量为1 mg/kg的2,4-D,培养55 d后,对2,4-D的降解率进行了测定。结果表明,两种土壤的矿化程度没有明显不同,2,4-D的矿化程度均达到70%～80%,而在有氧与厌氧两种不同条件下,土壤中2,4-D的降解存在区别,有氧条件下2,4-D在棕壤和黑钙土中完全降解分别需要约50 d和45 d,而厌氧条件下,在两种土壤中完全降解均需要50～60 d。
译  名：
Degradation of the Herbicide 2,4-D in Anaerobic Soil Conditions
作  者：
WANG Xiang1,GUO Jian1,ZHANG Heng-xing2,MA Tengda1,ZHANG Hao1*,WANG Guo-lin3(1.College of Resources and Environment,Jilin Agricultural University,Changchun 130118; 2.Shannxi Province Xi'an Thermal Academy Co,Ltd.Xi'an 710032; 3.Logistics Department of 63850 Army,Baicheng 137000,China)
关键词：
2,4-D;Anaerobic conditions;Flooded soil;Mineralization
摘  要：
2,4-dichlorophenoxyacetic acid(2,4-D) is a herbicide widely used in the world.The compound persists under most environmental conditions,yet it is rapidly transformed under certain anaerobic conditions.A experiment was conducted to determine the degradation of 2,4-D and CO2 evolution in brown earth and chernozems.2,4-D was added to each soil at rates of 1mg/kg of soil.After 55 days of incubation,degradation of the 2,4-D was measured.The results showed that extent of mineralization was about 70-80%,with no significant differences between the two soils.Degradation of 2,4-D was difference under aerobic condition as compared to anaerobic conditions for two soils.Under aerobic conditions,all of 2,4-D was degraded in brown earth and chernozem in approximately 45d and 50d respectively.While under anaerobic conditions,the degradation needed 50-60d.

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