Journal of Zhejiang University-SCIENCE A

, Volume 4, Issue 4, pp 480–484 | Cite as

Effect of land use on microbial biomass-C,-N and-P in red soils

  • Chen Guo-chao 
  • He Zhen-li 
Environmental & Biotechnology


Eleven red soils varying in land use and fertility status were used to examine the effect of land use on microbial biomass-C,-N and-P. Microbial biomass-C in the red soils ranged from about 68 mg C/kg to 225 mg C/kg, which is generally lower than that reported from other types of soil, probably because of low organic matter and high acidity in the red soils. Land use had considerable effects on the amounts of soilCmic. TheCmic was the lowest in eroded fallow land, followed by woodland, tea garden, citrus grove and fallow grassland, and the highest in vegetable and paddy fields. There was significant correlation betweenCmic and organic matter content, suggesting that the influence of land use onCmic is mainly related to the input and accumulation of organic matter. Microbial biomass-N in the soils ranged from 12.1 Nmg/kg to 31.7 Nmg/kg and was also affected by land use. The change ofNmic with land use was similar to that ofCmic. The microbial C/N ratio ranged from 5.2 to 9.9 and averaged 7.6. TheNmic was significantly correlated with soil total N and available N. Microbial biomass-P in the soils ranged from 4.5 mg P/kg to 52.3 mg P/kg. The microbial C/P ratio was in the range of 4–23. ThePmic was relatively less affected by land use due to differences in fertilization practices for various land use systems.

Key words

Land use Microbial biomass-C,-N and-P Red soils 

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Copyright information

© Zhejiang University Press 2003

Authors and Affiliations

  1. 1.Department of Resource Science, College of Environmental and Resource SciencesZhejiang UniversityHangzhouChina

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