Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 04, Issue 4, 2002; Page No.(521-525)

MEASUREMENT OF MICROBIAL BIOMASS-C, N AND P FROM SEMI-ARID SOILS OF RAJKOT (GUJARAT), INDIA

S.A. BATT AND H. CHHAYA

Abstract

Microbial biomass-C, N and P were measured in soil at two depths viz., 0-10 and 10-20 ans at two different sites periodically over 12 months for semi-arid soil showing some topographical differences. The turnover of C, N and P was found to be higher during Summer season (224.41.ig/g, 103.69 p.g/g and 9.83 lig/ g and 9.83 lig/g respectively) and was minimum during Monsoon season (101 pig/g, 6.96 lig/g and 1.62 jig/ g respectively). Concentrations of biomass-C, N and P were found to decrease with increase in depth. The microbial activities were affected by environmental factors and soil edaphic characters. The turnover of biomass-N and P was quite low perhaps may be due to lower N and P status of soil. Moreover, very high C/N ratio restricts the development of microbial biomass in the soil. Activity of decomposer communities in terms of microbial biomass-C, N and P content of Semi-arid soil of Rajkot (Gujarat) are presented.

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