Effects of High Rate of Alachlor and Metolachlor on Microbial Activities in Soil

Sahid, Ismail and Kasim, Zayda (1994) Effects of High Rate of Alachlor and Metolachlor on Microbial Activities in Soil. Pertanika Journal of Tropical Agricultural Science, 17 (1). pp. 43-47. ISSN 0126-6128

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Abstract

A study was carried out to investigate the effects of the two acetanilide herbicides alachlor and metolachlor on microbial activities in sandy loam soil. Effects of the herbicides on CO2 evolution were monitored for 50 d in ambient conditions. The results showed that alachlor and metolachlor generally caused an initial decrease in CO2 release, which subsequently increased to control level after 25 d of incubation. Both herbicides exert less effect on CO2 evolution at lower concentrations. Fungal and bacterial populations in the soil also declined in the presence of either herbicide at higher concentrations. Phosphatase activity was generally affected in the presence of either herbicide except in soil treated with metolachlor at 20 ppm.

Item Type:Article
Keyword:alachlor, metolachlor, soil microbes, carbon dioxide evolution, phosphatase activity
Publisher:Universiti Putra Malaysia Press
ID Code:3228
Deposited By: Nasirah Abu Samah
Deposited On:24 Nov 2009 07:58
Last Modified:27 May 2013 07:06

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