Biology and Fertility of Soils

, Volume 26, Issue 1, pp 31–34

Microbial contribution to extractable N and P after air-drying of dry tropical soils

  • S. C. Srivastava

DOI: 10.1007/s003740050339

Cite this article as:
Srivastava, S. Biol Fertil Soils (1997) 26: 31. doi:10.1007/s003740050339


The microbial contribution to extractable N and P after the air-drying of eight Indian dry tropical Ultisols was quantified. Air-drying of the soils decreased microbial biomass C by 25–53% but increased extractable N and P by 14–34% and 24–121%, respectively. This increase in the extractable N and P was accounted for, to some extent, by microbial biomass killed due to air-drying. Microbial biomass contributes 17–36% and 19–82% to the extractable N and P, respectively, possibly due to air-drying of the soils. I conclude that due to contamination of microbial biomass with the available nutrients in air-dried soils, measurements of extractable nutrients should be made on field-moist soils.

Key words Microbial biomass Air-drying Extractable nitrogen Extractable phosphorus Tropical soil 

Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • S. C. Srivastava
    • 1
  1. 1.Department of Forestry and Environmental Sciences, Guru Ghasidas University, Bilaspur (M.P.)-495009, IndiaIN

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