[1]ZHANG Yong,DU Hua-dong,ZHANG Zhen-guo,et al.Evolution Characteristics of Soil Biological Property in Loess Hilly Region under Natural Vegetation Restoration[J].Research of Soil and Water Conservation,2014,21(01):6-11,17.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
21
Number of periods:
2014 01
Page number:
6-11,17
Column:
Public date:
2014-02-28
- Title:
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Evolution Characteristics of Soil Biological Property in Loess Hilly Region under Natural Vegetation Restoration
- Author(s):
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ZHANG Yong1,2, DU Hua-dong1,3, ZHANG Zhen-guo4, FENG Chuan5
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1. College of Geology & Environment, Xi’an University of Science and Technology, Xi’an 710054, China;
2. Shaanxi Provincial Department of Water Resources, Xi’an 710004, China;
3. Institute of Soil and Water Conservation, Chinese Academy of Sciences, Ministry of Water Resources, Yangling, Shaanxi 712100, China;
4. College of Urban Construction and Environment, Anhui Science and Technology University, Bengbu, Anhui 233100, China
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- Keywords:
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loess hilly region; vegetation restoration; soil microbe; soil enzyme; soil nutrient
- CLC:
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S154.31
- DOI:
-
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- Abstract:
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In order to investigate evolution characteristics of soil biological property in loess hilly region during the process of natural vegetation restoration, soil nutrient content, microbial biomass and enzyme activities of the five natural vegetation successional stages (abandoned time 1~6 a, 7~17 a, 18~35 a, 36~60 a, >60 a) were studied by using spatio-temporal substitution method in Yangou and Xiannangou watershed. The results showed that soil organic carbon, total nitrogen, available nitrogen and available potassium increased during the natural process of vegetation succession after stop of cropping, but there was no significant difference for the contents of soil total phosphorus in different succession phases. The content of available phosphorus was the lowest during the vegetation succession progress of perennial herb stages (18~35 a). The amount of soil bacteria accounted for about 55% of soil microbial biomass during the natural vegetation succession of 18~35 a, there were more soil bacteria than at other stages. The amount of soil fungi and actinomycetes showed a rising trend with the development of vegetation succession. And the activity of soil alkaline phosphatase, urease and invertase increased with the advance of vegetation succession. However, the increase rates of activity of urease and invertase decreased after 36 a. The result of correlation analysis showed that the amount of soil microbes were consistent with soil enzyme activity in natural restoration process of abandoned farmland, and had a close relationship with soil nutrient. Soil microbes and enzyme can be chosen as biological indicators to evaluate soil biological quality during the process of natural vegetation restoration.