丁草胺在热带土壤中的降解：施用量、生物-非生物相互作用及土壤条件的影响

Butachlor degradation in tropical soils: effect of application rate, biotic-abiotic interactions and soil conditions.

作者信息

Pal R, Das P, Chakrabarti K, Chakraborty A, Chowdhury A

机构信息

Department of Agricultural Chemistry & Soil Science, Calcutta University, Calcutta, India.

出版信息

J Environ Sci Health B. 2006;41(7):1103-13. doi: 10.1080/03601230600851141.

DOI:10.1080/03601230600851141

PMID:16923594

Abstract

The degradative characteristics of butachlor (N-Butoxymethyl-2-chloro-2',6'-diethyla- cetanilide) were studied under controlled laboratory conditions in clay loam alluvial (AL) soil (Typic udifluvent) and coastal saline (CS) soil (Typic endoaquept) from rice cultivated fields. The application rates included field rate (FR), 2-times FR (2FR) and 10-times FR (10FR). The incubation study was carried out at 30 degrees C with and without decomposed cow manure (DCM) at 60% of maximum water holding capacity (WHC) and waterlogged soil condition. The half-life values depended on the soil types and initial concentrations of butachlor. Butachlor degraded faster in AL soil and in soil amended with DCM under waterlogged condition. Microbial degradation is the major avenue of butachlor degradation from soils.

摘要

在可控的实验室条件下，对丁草胺（N-丁氧甲基-2-氯-2'，6'-二乙基乙酰苯胺）在稻田的黏壤土冲积土（典型湿新成土）和滨海盐土（典型潮湿雏形土）中的降解特性进行了研究。施用量包括田间施用量（FR）、2倍田间施用量（2FR）和10倍田间施用量（10FR）。在30℃、最大持水量（WHC）的60%且有和没有添加腐熟牛粪（DCM）的淹水土壤条件下进行了培养研究。半衰期值取决于土壤类型和丁草胺的初始浓度。丁草胺在冲积土和淹水条件下添加DCM的土壤中降解更快。微生物降解是土壤中丁草胺降解的主要途径。