alexa A Short Term Study on Toxic Effects of Distillery Sludge Amendment on Microbiological and Enzymatic Properties of Agricultural Soil in a Tropical City
ISSN: 2157-7617

Journal of Earth Science & Climatic Change
Open Access

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Research Article

A Short Term Study on Toxic Effects of Distillery Sludge Amendment on Microbiological and Enzymatic Properties of Agricultural Soil in a Tropical City

Brahma Dutt Tripathi*
Department of Botany, Banaras Hindu University, Varanasi, India
Corresponding Author : Brahma Dutt Tripathi
Department of Botany, Banaras Hindu University, Varanasi, India
E-mail: [email protected]
Received March 09, 2011; Accepted July 20, 2011; Published July 25, 2011
Citation: Tripathi BD (2011) A Short Term Study on Toxic Effects of Distillery Sludge Amendment on Microbiological and Enzymatic Properties of Agricultural Soil in a Tropical City. J Earth Sci Climat Change 1:106. doi: 10.4172/2157-7617.1000106
Copyright: © 2011 Tripathi BD. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
 

Abstract

Distillery sludge is an easy source of plant nutrient but its fertilizer value can vary considerably. In the present study anaerobically digested distillery sludge was applied to agricultural soils and its effect on soil biological and biochemical properties was evaluated. The sludge treatments were comprises of 0, 10, 50, 100 and 150 t ha-1 as single application in an agricultural field and tested for six months. Microbial respiration, microbial biomass carbon, FDA hydrolysis, phosphatase, urease and dehydrogenase activity were evaluated temporally throughout the incubation time for different amount of distillery sludge amendments. All biological parameters evaluated in this experiment were sensitive enough to show the effect of distillery sludge application on soil microorganisms. The results revealed that sludge application at different rates initially increased the microbial activity, its highest activity were found between 30 and 60 days after application when sludge was applied at the rate of 150 t ha-1 but after this the microbial activities decreases gradually. Results show that at applied dose and contact time soil microbial number increases but the diversity of soil microbial population decreases. Aerobic heterotrophic and symbiotic nitrogen fixing bacteria seems to be more sensitive to sludge addition and shows a marked decrease in population on higher doses. The results also shows that the sludge from distillery wastewater treatment plant may have potential as a beneficial soil amendment up to certain extent for improving biological properties of the soil but at higher doses its contamination can create harm for the beneficial soil inhabitant microbial population and their activities.

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