Long-term straw returning affects Nitrospira-like nitrite oxidizing bacterial community in a rapeseed-rice rotation soil

被引:53
作者
Luo, Xuesong [1 ,2 ]
Han, Shun [1 ]
Lai, Songsong [1 ]
Huang, Qiaoyun [1 ,2 ]
Chen, Wenli [1 ]
机构
[1] Huazhong Agr Univ, State Key Lab Agr Microbiol, Wuhan 430070, Peoples R China
[2] Huazhong Agr Univ, Minist Agr, Key Lab Arable Land Conservat Middle & Lower Reac, Coll Resources & Environm, Wuhan, Peoples R China
关键词
clone library; diversity; Nitrospira-like nitrite oxidizing bacteria; NxrB; straw incorporation; AMMONIA-OXIDIZERS; COMPLETE NITRIFICATION; MICROBIAL COMMUNITIES; NITRIFYING BACTERIA; DIVERSITY; FERTILIZATION; RHIZOSPHERE; MANAGEMENT; ABUNDANCE; ARCHAEAL;
D O I
10.1002/jobm.201600400
中图分类号
Q93 [微生物学];
学科分类号
071005 [微生物学];
摘要
Nitrospira are the most widespread and well known nitrite-oxidizing bacteria (NOB) and putatively key nitrite-oxidizers in acidic ecosystems. Nevertheless, their ecology in agriculture soils has not been well studied. To understand the impact of straw incorporation on soil Nitrospira-like bacterial community, a cloned library analysis of the nitrite oxidoreductase gene-nxrB was performed for a long-term rapeseed-rice rotation system. In this study, most members of the Nitrospira-like NOB in the paddy soils from the Wuxue field experiment station were phylogenetically related with Nitrospira lineages II. The Shannon diversity index possessed a decrease trend in the straw applied soils. The relative abundances of 16 OTUs (accounting 72% of the total OTUs, including 11 unique OTUs and 5 shared OTUs) were different between in the straw applied and control soils. These data suggested a selection effect from the long-term straw fertilization. Canonical correspondence analysis data showed that a centralized group of Nitrospira-like NOB OTUs in the community was partly explained by the soil ammonium, nitrate, available phosphorus, and the available potassium. This could suggest that straw fertilization led to the soil Nitrospira-like NOB community shift, which was correlated with the change of available nutrients in the bulk soil.
引用
收藏
页码:309 / 315
页数:7
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