Document Detail

Persistence of the herbicide butachlor in soil after repeated applications and its effects on soil microbial functional diversity.
MedLine Citation:
PMID:  19130370     Owner:  NLM     Status:  MEDLINE    
Effects of repeated applications of the herbicide butachlor (N-(butoxymethyl)-2-chloro -N-2',6'-dimethyl acetanilide) in soil on its persistence and soil microbial functional diversity were investigated under laboratory conditions. The degradation half-lives of butachlor at the recommended dosage in soil were calculated to be 12.5, 4.5, and 3.2 days for the first, second, and third applications, respectively. Throughout this study, no significant inhibition of the Shannon-Wiener index H' was observed. However, the Simpson index 1/D and McIntosh index U were significantly reduced (P < or = 0.05) during the initial 3 days after the first application of butachlor, and thereafter gradually recovered to a similar level to that of the control soil. A similar variation but faster recovery in 1/D and U was observed after the second and third Butachlor applications. Therefore, repeated applications of butachlor led to more rapid degradation of the herbicide, and more rapid recovery of soil microorganisms. It is concluded that repeated butachlor applications in soil had a temporary or short-term inhibitory effect on soil microbial communities.
Hua Fang; Yun L Yu; Xiu G Wang; Xiao Q Chu; Xiao E Yang
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes     Volume:  44     ISSN:  1532-4109     ISO Abbreviation:  J Environ Sci Health B     Publication Date:  2009 Feb 
Date Detail:
Created Date:  2009-01-08     Completed Date:  2009-03-19     Revised Date:  2009-07-21    
Medline Journal Info:
Nlm Unique ID:  7607167     Medline TA:  J Environ Sci Health B     Country:  United States    
Other Details:
Languages:  eng     Pagination:  123-9     Citation Subset:  IM    
Department of Plant Protection, College of Agriculture & Biotechnology, Zhejiang University, Hangzhou, China.
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MeSH Terms
Acetanilides / analysis*,  metabolism,  pharmacology
Biodegradation, Environmental
Chromatography, Gas
Herbicides / analysis*,  metabolism,  pharmacology
Soil Microbiology*
Soil Pollutants / analysis*,  metabolism,  pharmacology
Reg. No./Substance:
0/Acetanilides; 0/Herbicides; 0/Soil Pollutants; 23184-66-9/butachlor

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