Microbial C, N and P in dry tropical savanna: effects of burning and grazing.

Published online
25 Apr 1992
Content type
Journal article
Journal title
Journal of Applied Ecology

Singh, R. S. & Srivastava, S. C. & Raghubanshi, A. S. & Singh, J. S. & Singh, S. P.

Publication language
India & Uttar Pradesh


The effects of burning and grazing of dry tropical Indian savanna on the level of available nutrient pools and microbial C, N and P were assessed. The maximum amounts of available nutrients and microbial biomass occurred in the dry period and the minimum in the wet period. Burning and grazing increased inorganic N by 54% and 15-49%, resp, and also increased bicarbonate-extractable inorganic P by 35% and 27-32%, resp. Mean annual microbial C varied from 361 to 466 μg/g, microbial N from 35 to 44 μg/g and microbial P from 16 to 23 μg/g dry soil. The mean annual microbial C, N and P were positively related to each other. Burning increased microbial C by 18%, microbial N by 26% and microbial P by 35%, and grazing increased microbial C by 15-18%, microbial N by 14-23% and microbial P by 19-29%.

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