Long-term application of organic manure changes abundance and composition of ammonia-oxidizing archaea in an acidic red soil
文献类型： 外文期刊
作者： Shen, Weishou 1 ; Xu, Tingting 1 ; Liu, Juanjuan 1 ; Huang, Qianru 3 ; Gu, Ganyu 4 ; Zhong, Wenhui 1 ;
作者机构： 1.Nanjing Normal Univ, Dept Environm Sci & Engn, Nanjing 210023, Jiangsu, Peoples R China
2.Nanjing Normal Univ, Jiangsu Prov Key Lab Mat Cycling & Pollut Control, Nanjing 210023, Jiangsu, Peoples R China
3.Jiangxi Inst Red Soil, Jinxian 331717, Jiangxi, Peoples R China
4.Virginia Polytech Inst & State Univ, Eastern Shore Agr Res & Extens Ctr, Painter, VA 23420 USA
关键词： ammonia-oxidizing archaea (AOA);ecological restoration;long-term fertilizer experiment;nitrification potential;soil fertility
期刊名称：SOIL SCIENCE AND PLANT NUTRITION （ 影响因子：2.389； 五年影响因子：2.525 ）
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收录情况： SCI
摘要： Ammonia-oxidizing archaea (AOA) have more importance in ammonia oxidation than ammonia-oxidizing bacteria (AOB) in acidic red soils. The aim of this study was to investigate if the abundance and composition of AOA could be altered by long-term application of organic manure in an acidic red soil. The abundance and composition of AOA were evaluated by polymerase chain reaction (PCR) and denaturing gradient gel electrophoresis (DGGE) targeting archaeal amoA genes after long-term (24-year) application of mineral fertilizer and/or organic manure. The treatments were: non-fertilized control, mineral nitrogen (N) fertilizer only, mineral N, phosphorus (P) and potassium (K) fertilizer only, organic manure only, and organic manure plus mineral NPK fertilizer. The abundance of archaeal amoA genes was significantly increased after the long-term application of organic manures, either with or without mineral NPK fertilizer. So were the Shannon and Richness diversity indices of AOA deduced from the DGGE patterns. Phylogenetic analyses showed that most of the AOA sequences from various fertilization treatments were affiliated with group 1.1b thaumarchaea and only one with the group 1.1a-associated thaumarchaea. Nitrification potential was significantly increased after the long-term application of organic manures in comparison with the non-fertilized control. Our results strengthened the importance of organic manure in promoting the growth of AOA and thus nitrification potential in the acidic red soils.
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