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Seasonal changes in soil microbial biomass under different agro-ecosystems of Arunachal Pradesh, North East India

Authors:

S I Bhuyan ,

University of Science & Technology, Meghalaya, IN
About S
Department of Botany
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O P Tripathi,

North Eastern Regional Institute of Science and Technology, Nirjuli-791109, Arunachal Pradesh, IN
About O
Department of Forestry
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M L Khan

North Eastern Regional Institute of Science and Technology, Nirjuli-791109, Arunachal Pradesh, IN
About M
Department of Forestry,
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Abstract

The study was carried out to investigate the soil microbial biomass C, N and P of major agro-ecosystems prevalent in East Siang district, Arunachal Pradesh viz., Soybean, Millet, Maize and Vegetable agro-ecosystem. The study was conducted for a period of an annual cycle during the year 2010-11. Microbial biomass C and N ranged between 199.61 and 238.35 μg g-1 and 15.46 and 26.55 μg g-1 respectively. It was found to be higher in the surface soil layer than the subsurface layer in all the agro-ecosystems. Microbial biomass P significantly varied among the seasons and sites (P<0.05). Microbial C/N ratio was found to be higher in subsurface soil layer than the surface soil layer and the ratio varied between 8.83 and 13.94 in all the sites. Microbial biomass C contribution to total soil organic carbon was 1.13%-3.37%. Microclimatic variations and different agricultural practices were found to affect the changes in microbial biomass.

DOI: http://dx.doi.org/10.4038/jas.v8i3.6087

The Journal of Agricultural Sciences, 2013, vol.8, no3 p. 142-152

DOI: http://doi.org/10.4038/jas.v8i3.6087
How to Cite: Bhuyan, S.I., Tripathi, O.P. & Khan, M.L., (2013). Seasonal changes in soil microbial biomass under different agro-ecosystems of Arunachal Pradesh, North East India. Journal of Agricultural Sciences. 8(3), pp.142–152. DOI: http://doi.org/10.4038/jas.v8i3.6087
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Published on 23 Sep 2013.
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