Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol.12, Issue 2, 2010; Page No.(369-373 )

SEASONAL CHANGES IN SOIL MICROBIAL BIOMASS AND ENZYME ACTIVITY IN ARABLE AND BARREN LAND

RATNA TRIVEDI AND S.A.BHATT

Abstract

Seasonal changes in soil moisture, soil temperature and C input from crop roots, rhizosphere products and crop residues can have a large effect on soil microbial biomass and its activity. The objective of this study was to quantify the seasonal changes in soil microbial biomass and the enzyme activity in soils under cultivation and barren lands. Soil samples were taken at four different seasons for two years of study. Significant differences were found between soil sampling periods for microbial biomass, Mineralizable C and enzyme activity. Microbial biomass C in summer season compared to post monsoon season arable land and barren land averaged 61.4, 55.3 % respectively. Mineralizable C was higher in soils under arable lands, possibly due to more flows of C and N to soils. During post monsoon season Urease activity is higher whereas no Amidase activity in all samples. During summer season both the enzyme activities were reported higher may be more favorable weather, conditions (moisture and temperature) and fertilization increased soil enzyme activity.

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