Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 10, Issue 2, 2008; Page No.(295-300 )

IMPACT OF CHLORPYRIFOS ON SOIL ENZYME ACTIVITIES IN AGRICULTURAL SOIL

M. SUREKHA RANI, K.VIJAYA LAKSHMI, P. SUVARNALATHA DEVI, R. JAYA MADHIURI, S. HARITHA DEVI AND K. JYOTHI

Abstract

Impact application of different concentrations of Chlorpyrifos (commercial formulation) on activities of soil enzymes like cellulase, amylase, protease, phosphatase, urease and dehydrogenase was evaluated in loamy sand soil at different stages of incubation under laboratory conditions and initial suppression of cellulase, amylase, protease was noticed in chlorpyrifos (CPF) treated soil samples over the control sample, however these enzymes showed recovery tendency around 21st day of incubation. Suppression of phosphatase activity was observed for the entire period of study and progressively decreased with increasing period of incubation. Urease and dehydrogenase activities were found sensitive with increasing concentrations of CPF.

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