Mineralisation of atrazine, metolachlor and their respective metabolites in vegetated filter strip and cultivated soil

Pest Management Science
Larry J KrutzDennis P Tierney

Abstract

In vegetated filter strips (VFS) the presence of perennial vegetation, rhizodeposition of labile organic substrates and the accumulation of an organic residue thatch layer may enhance microbial numbers and activity, thereby increasing the potential for mineralisation of herbicides and herbicide metabolites retained during run-off events. The objective of this laboratory experiment was to compare the mineralisation of atrazine and metolachlor with that of their respective metabolites in VFS and cultivated soil. With the exception of total bacteria, propagule density of the microbial groups, endogenous soil enzymes and microbial diversity were higher in the VFS soil. This correlated with increased mineralisation of metolachlor and its metabolites in the VFS soil and indicates potential for VFS to curtail the subsequent transport of these compounds. In contrast, the mineralisation of atrazine and the majority of its metabolites was substantially reduced in VFS soil relative to cultivated soil. Consequently, the potential for subsequent transport of atrazine and many of its metabolites may be greater in VFS soil than in cultivated soil if reduced mineralisation is not offset by increased sorption in the VFS.

References

May 11, 2000·The Science of the Total Environment·G M Clark, D A Goolsby
May 11, 2000·The Science of the Total Environment·E M ThurmanT Mollhagen
May 11, 2000·The Science of the Total Environment·E A ScribnerE M Thurman
Dec 3, 2003·Journal of Agricultural and Food Chemistry·Larry Jason KrutzDennis Patrick Tierney
Jan 1, 1985·Applied and Environmental Microbiology·W D GouldR M Zablotowicz

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Citations

Jun 21, 2011·Environmental Toxicology and Chemistry·Richard M T WebbDale L Shaner
Feb 4, 2010·Pest Management Science·L Jason KrutzSteven J Thomson
Jan 12, 2007·Journal of Environmental Quality·Dale L Shaner, W Brien Henry
May 7, 2011·Journal of Environmental Quality·Chung-Ho LinHarold E Garrett
May 6, 2008·Journal of Environmental Quality·Tracy C HancockJack E Barbash
Jan 6, 2010·Journal of Environmental Quality·Judith M DenverJeffrey R Barbaro
Mar 1, 2012·Journal of Environmental Quality·William M RobertsPhilip M Haygarth
Aug 17, 2010·Journal of Agricultural and Food Chemistry·Ana María García-MartínezJuan Parrado
Jul 30, 2021·The Science of the Total Environment·Marc StutterDaire Ó hUallacháin
Dec 31, 2010·Journal of Agricultural and Food Chemistry·Ana MunozMichael J Sadowsky
Feb 1, 2007·Journal of Agricultural and Food Chemistry·Robert M ZablotowiczMartin A Locke

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