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Response of soil microorganisms to vegetational
succession in Ziwuling Forest |
| Hong ZHANG1,Jialong LU1,Shiwei ZHAO2, |
| 1.College of Resource and
Environment, Northwest A & F University, Yangling 712100, China; 2.Institute of Soil and
Water Conservation, Chinese Academy of Sciences and Ministry of Water
Resources, Yangling 712100, China; |
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Abstract This study investigates the changes in soil microbial populations as vegetational succession progress from abandoned farmland to climax forest in the Ziwuling Forest, which is located in the northern part of the Loess Plateau, China. Different organic C and total extractable N between the fumigated and non-fumigated soils were assumed to be released from soil microorganisms. Soil microbial C was calculated using Kec=0.38 and microbial N was calculated using Ken=0.45. The released P was converted to microbial biomass P using Kep=0.40. Soil bacteria, fungi, and actinomycetes increased as the vegetational succession progressed. Microbial C was of the highest amount in farmland. Microbial C, N, and P generally increased from abandoned land to climax community. The results indicated significant (P<0.05) diversities of soil microbial biomass under different vegetation. There was a significant correlation between microbial biomass and soil nutrients. Knowledge about soil microbial populations is important for forecasting vegetational succession and determining the ecological condition of the environment.
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| Keywords
soil microorganisms
vegetational succession
Ziwuling Forest
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Issue Date: 05 December 2009
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