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Bacterial diversity in soils subjected to long-term chemical fertilization can be more stably maintained with the addition of livestock manure than wheat straw

文献类型： 外文期刊

作者： Sun, Ruibo 1 ; Zhang, Xue-Xian 2 ; Guo, Xisheng 3 ; Wang, Daozhong 3 ; Chu, Haiyan 1 ;

作者机构： 1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China

2.Massey Univ Albany, Inst Nat & Math Sci, Auckland 0745, New Zealand

3.Anhui Acad Agr Sci, Soil & Fertilizer Res Inst, Hefei 230031, Peoples R China

4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

关键词： Long-term fertilization;Soil pH;Organic matter;Bacterial community;454 pyrosequencing

期刊名称：SOIL BIOLOGY & BIOCHEMISTRY （ 影响因子：7.609； 五年影响因子：8.312 ）

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收录情况： SCI

摘要： Addition of organic matter such as livestock manures and plant residues is a feasible practice to mitigate soil degradation caused by long-term application of chemical fertilizers, and the mitigation is largely mediated though activities of the soil-dwelling microorganisms. However, the roles of different kinds of organic matter in maintaining bacterial community structure have not been assessed in a comparative manner. In this study, 454 pyrosequencing of 16S rRNA gene was employed to compare the bacterial community structure among soils that had been subjected to 30 years of NPK fertilization under six treatment regimes: non-fertilization control, fertilization only, and fertilization combined with the use of pig manure, cow manure or low- and high-level of wheat straws. Consistent with expectation, long-term application of NPK chemical fertilizers caused a significant decrease of bacterial diversity in terms of species richness (i.e. number of unique operational taxonomic units (OTU)), Faith's index of phylogenetic diversity and Chao 1 index. Incorporation of wheat straw into soil produced little effects on bacterial community, whereas addition of either pig manure or cow manure restored bacterial diversity to levels that are comparable to that of the non-fertilization control. Moreover, bacterial abundance determined by quantitative PCR was positively correlated with the nutritional status of the soil (e.g., nitrate, total nitrogen, total carbon, available phosphorus); however, bacterial diversity was predominantly determined by soil pH. Together, our data implicate the role of livestock manures in preventing the loss of bacterial diversity during long-term chemical fertilization, and highlight pH as the major deterministic factor for soil bacterial community structure. (C) 2015 Elsevier Ltd. All rights reserved.

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[2]Soil organic carbon contents as a result of various organic amendments to a vertisol. Hua, Keke,Wang, Daozhong,Guo, Zhibin.

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[4]Evaluating crop response and environmental impact of the accumulation of phosphorus due to long-term manuring of vertisol soil in northern China. Hua, Keke,Guo, Zhibin,Wang, Daozhong,Zhang, Wenju,Oenema, Oene.

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