Biology and Fertility of Soils

, Volume 19, Issue 2, pp 215–219

Microbial biomass phosphorus in soils of beech (Fagus sylvatica L.) forests


  • Rainer G. Joergensen
    • Institut für Bodenwissenschaften
  • Helga Kübler
    • Institut für Bodenwissenschaften
  • Brunk Meyer
    • Institut für Bodenwissenschaften
  • Volkmar Wolters
    • Institut für allgemeine und spezielle Zoologie
Original Paper

DOI: 10.1007/BF00336162

Cite this article as:
Joergensen, R.G., Kübler, H., Meyer, B. et al. Biol Fertil Soils (1995) 19: 215. doi:10.1007/BF00336162


Thirty-eight soils from forest sites in central Germany dominated by beech trees (Fagus sylvatica L.) were sampled to a depth of about 10 cm after careful removal of the overlying organic layers. Microbial biomass P was estimated by the fumigation — extraction method, measuring the increase in NaHCO3-extractable phosphate. The size of the microbial P pool varied between 17.7 and 174.3 μg P g-1 soil and was on average more than seven times larger than NaHCO3-extractable phosphate. Microbial P was positively correlated with soil organic C and total P, reflecting the importance of soil organic matter as a P source. The mean microbial P concentration was 13.1% of total P, varying in most soils between 6 and 18. Microbial P and microbial C were significantly correlated with each other and had a mean ratio of 14.3. A wide (5.1–26.3) microbial C: P ratio indicates that there is no simple relatinship between these two parameters. The microbial C: P ratio showed strong and positive correlations with soil pH and cation exchange capacity.

Key words

Microbial biomassAcidificationBeech forestSoil organic CTotal PFagus sylvatica

Copyright information

© Sprigner-Verlag 1995