[1]YANG Bingxun,LIU Qua,DONG Tingxu.Variation of Soil Nutrients and Microbial Community Diversity of Different Land Use Types in the Jialing River, Sichuan Province[J].Research of Soil and Water Conservation,2017,24(05):14-20,26.
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Variation of Soil Nutrients and Microbial Community Diversity of Different Land Use Types in the Jialing River, Sichuan Province
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
24
Number of periods:
2017 05
Page number:
14-20,26
Column:
Public date:
2017-10-28
- Title:
- Variation of Soil Nutrients and Microbial Community Diversity of Different Land Use Types in the Jialing River, Sichuan Province
- CLC:
- S154.3;X144
- DOI:
- -
- Abstract:
- We present a comprehensive analysis of soil nutrients and soil microbial community diversity of different land use types in Jialing River from 2013 to 2015, based on the soil habitat, the structure and function of soil microbial community were studied by using Biolog plate and phospholipid fatty acid methyl ester (FAMEs), respectively. The results are as follows. The soil nutrients of different land use types decrease in the order: mingled forest > broad-leaved forest > coniferous forest > shrub > meadow > bare land. There were significant differences in functional diversity of microbial communities of different land use types. The average well color development (AWCD), which directly reflects microbial activity and functional diversity, increased and then decreased with the order: mingled forest > broad-leaved forest > coniferous forest > shrub > meadow > bare land. The carbon sources mostly used by soil microbes were carbohydrates and carboxylic acids, followed by amino acids, phenolic acids and polymers, the lowest was amines. The Simpson index, Shannon-Wiener index, richness index and McIntosh index of different land use types showed the sequence: mingled forest > broad-leaved forest > coniferous forest > shrub > meadow > bare land. Principal component analysis identified two factors in relation to carbon sources, they explained 65.154% and 81.047% of the variation, respectively. The carbon sources used by soil microbial communities were different among different land use types. Amino acids and amides were the two main carbon sources separating the two principal component factors. Correlation analysis showed that soil microbial diversity index was significantly or very significantly positively correlated with soil nutrients, and was negatively correlated with pH value, the soil nutrients had the more positive contribution to soil microbial diversity and soil pH value had the negative contribution, which were the reason for variation of soil microbial community diversity of different land use types in Jialing River.
- References:
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