Journal of Food, Agriculture and Environment
Vol 11,
Issue 3&4,2013
Online ISSN: 1459-0263
Print ISSN: 1459-0255
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Dynamics of soil microbial structure and its potential to indicate soil quality during natural restoration and succession processes in the Inner Mongolia Steppe
Author(s):
Ruixin Wu 1, 2,
Guihe Liu 3, Yuchen Kan 1, Yajun Zhang 1, Mengying Zhong 1, Jianxun Wang 1, Xinqing Shao 1*Recieved Date: 2013-08-10, Accepted Date: 2013-10-06
Abstract:To reveal the dynamics of soil microbial communities and their potential to indicate soil quality in natural restoration and succession processes, we conducted a field experiment in a degraded area of a typical steppe ecotype using a space series method instead of a time course method. The results indicated that soil microbial biomass carbon (MBC) and microbial biomass nitrogen (MBN) both conformed to the vertical distribution rule. Specifically, soil microbial biomass (MBC and MBN) decreased with increasing soil depth in different restoration and succession stages, and increased with time in each soil layers in areas that had been fenced in. The abundance of soil microorganisms was bacterium > actinomycete > fungi in all restoration and succession stages, and the fundamental trend of vertical distribution was 0-5 cm > 5-10 cm > 10-20 cm > 20-30 cm. The quantity of soil microorganisms and soil microbial biomass were both 10 years > 6 years > 4 years > 2 years > 1 year. Soil MBC in the surface layer (0-5 cm) was more sensitive to environmental change and had a close relationship with environmental factors (diversity index, SOM, above-ground biomass, TN, soil bulk density, soil water content and MBN); therefore, soil MBC has great potential for surveying soil quality restoration in typical steppe ecosystems.
Keywords:Typical steppe,
restoration, enclosure, soil microbial biomassJournal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Environment
Pages: 2265-2272
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