Biology and Fertility of Soils

, Volume 19, Issue 2, pp 124–128

Microbial biomass nitrogen pool in soils from a warm temperate grassland, and from deciduous and evergreen forests in Chiba, central Japan

  • S. K. Billore
  • M. Ohsawa
  • M. Numata
  • S. Okano
Original Paper

DOI: 10.1007/BF00336147

Cite this article as:
Billore, S.K., Ohsawa, M., Numata, M. et al. Biol Fertil Soils (1995) 19: 124. doi:10.1007/BF00336147

Abstract

We evaluated the status of the microbial biomass N pool in grassland, and in deciduous and evergreen forest soils in Chiba, central Japan. Microbial biomass N, a labile fraction of total N in the soil, ranged from 6.96 g N m-2 (15 cm depth) in the grassland to 24.8 g in the deciduous and 20.7 g in the evergreen soils, on a landscape basis. Thus the pattern in the grassland and in the forest soils differed. The N flush measured by a fumigation-incubation method indicated that in the grassland soil microbial biomass N was underestimated by a factor of 2.6 compared with the results from a fumigation-extraction method, because of heavy N immobilization in the microbial biomass. This was in contrast to results from the forest soils, which did not immobilize N. Thus, the forest soils were in a steady-state condition compared with the grassland which formed a seral phase in the ecological succession. Simple correlation coefficients indicated a significant positive relationship between biomass N and organic C in the soil and the N concentration in the litter, the main component of organic matter in the soils of the three ecosystems.

Key words

Microbial biomass N Litter Grassland Forests Organic carbon N Immobilization Succession 

Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • S. K. Billore
    • 1
    • 2
  • M. Ohsawa
    • 1
    • 2
  • M. Numata
    • 1
    • 2
  • S. Okano
    • 1
    • 2
  1. 1.Ecology Laboratory, Faculty of ScienceChiba UniversityChibaJapan
  2. 2.National Grassland Research InstituteTochigiJapan
  3. 3.School of Studies in BotanyVikram UniversityUjjainIndia
  4. 4.Natural History Museum and Institute of ChibaChibaJapan

Personalised recommendations