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Bulletin of environmental contamination and toxicology

Microbial biomass and carbon mineralization in agricultural soils as affected by pesticide addition.


PMID 22310842

Abstract

A laboratory study was conducted with four pesticides, viz. a fungicide (carbendazim), two insecticides (chlorpyrifos and cartap hydrochloride) and an herbicide (pretilachlor) applied to a sandy clay loam soil at a field rate to determine their effect on microbial biomass carbon (MBC) and carbon mineralization (C(min)). The MBC content of soil increased with time up to 30xa0days in cartap hydrochloride as well as chlorpyrifos treated soil. Thereafter, it decreased and reached close to the initial level by 90th day. However, in carbendazim treated soil, the MBC showed a decreasing trend up to 45xa0days and subsequently increased up to 90xa0days. In pretilachlor treated soil, MBC increased through the first 15xa0days, and thereafter decreased to the initial level. Application of carbendazim, chlorpyrifos and cartap hydrochloride decreased C(min) for the first 30xa0days and then increased afterwards, while pretilachlor treated soil showed an increasing trend.

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