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Bacterial community structure and diversity in a black soil as affected by long-term fertilization

文献类型： 外文期刊

作者： Wei Dan 1 ; Yang Qian 1 ; Zhang Jun-Zheng 1 ; Wang Shuang 1 ; Chen Xue-Li 2 ; Zhang Xi-Lin 2 ; Li Wei-Qun 2 ;

作者机构： 1.Harbin Inst Technol, Harbin 150001, Peoples R China

2.Heilongjiang Acad Agr Sci, Inst Soil Fertil & Environm Sources, Harbin 150086, Peoples R China

关键词： soil microbial population;catabolic function;black soil;ofsoil bacterial community

期刊名称：PEDOSPHERE （ 影响因子：3.911； 五年影响因子：4.814 ）

ISSN：

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收录情况： SCI

摘要： Black soil (Mollisol) is one of the main soil types in northeastern China. Biolog and polymerase chain reaction-denaturing gradient, gel electrophoresis (PCR-DGGE) methods were used to examine the influence of various fertilizer combinations on the structure and function of the bacterial community in a. black soil collected from Harbin, Heilongjiang Province. Biolog results showed that substrate richness and catabolic diversity of the soil bacterial community were the greatest in the chemical fertilizer and chemical fertilizer+manure treatments. The metabolic ability of the bacterial community in the manure treatment was similar to the control. DGGE fingerprinting indicated similarity in the distribution of most 16S rDNA bands among all treatments, suggesting that microorganisms with those bands were, stable and not influenced by fertilization. However, chemical fertilizer increased the diversity of soil bacterial community. Principal component analysis of Biolog and DGGE data revealed that, the structure and function of the bacterial community were similar in the control and manure treatments, suggesting that the application of manure increased the soil microbial population, but had no effect on the bacterial community structure. Catabolic function was similar in the chemical fertilizer and chemical fertilizer+manure treatments, but the composition structure of the soil microbes differed between them. The use of chemical fertilizers could result in a decline in the catabolic activity of fast-growing or eutrophic bacteria.

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