Effects of different vegetation restoration models on soil microbial biomass in eroded hilly Loess Plateau, China |
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| Authors: | Sha Xue Guobin Liu Quanhou Dai Xue Lan Na Yu |
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| Institution: | (1) Institute of Soil and Water Conservation, Chinese Academy of Sciences, China;(2) Ministry of Water Resources, Northwest A&F University, Yangling, 712100, China;(3) College of Forestry, Guizhou University, Guiyang, 550025, China;(4) Graduate University of Chinese Academy of Sciences, Beijing, 100039, China |
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| Abstract: | Vegetation restoration is a key measure to improve the eco-environment in Loess Plateau, China. In order to find the effect
of soil microbial biomass under different vegetation restoration models in this region, six trial sites located in Zhifanggou
watershed were selected in this study. Results showed that soil microbial biomass, microbial respiration and physical and
chemical properties increased apparently. After 30 years of vegetation restoration, soil microbial biomass C, N, P (SMBC,
SMBN, SMBP) and microbial respiration, increased by 109.01%–144.22%, 34.17%–117.09%, 31.79%–79.94% and 26.78%–87.59% respectively,
as compared with the farmland. However, metabolic quotient declined dramatically by 57.45%–77.49%. Effects of different models
of vegetation restoration are different on improving the properties of soil. In general, mixed stands of Pinus tabulaeformis-Amorpha fruticosa and Robinia pseudoacacia-A. fruticosa had the most remarkable effect, followed by R. pseudoacacia and Caragana korshinkii, fallow land and P. tabulaeformis was the lowest. Restoration of mixed forest had greater effective than pure forest in eroded Hilly Loess Plateau. The significant
relationships were observed among SMBC, SMBP, microbial respiration, and physical and chemical properties of soil. It was
concluded that microbial biomass can be used as indicators of soil quality.
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Translated from Journal of Natural Resources, 2007, 22(1): 20–27 译自: 自然资源学报] |
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| Keywords: | eroded hilly Loess Plateau vegetation restoration soil microbial biomass soil quality |
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