Urea fertilization decreases soil bacterial diversity, but improves microbial biomass, respiration, and N-cycling potential in a semiarid grassland
文献类型：期刊论文
| 作者 | Zhang, Chao1; Song, Zilin2; Zhuang, Daohua3; Wang, Jie1 ; Xie, Sisi3; Liu, Guobin1,4
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| 刊名 | BIOLOGY AND FERTILITY OF SOILS
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| 出版日期 | 2019-04-01 |
| 卷号 | 55期号:3页码:229-242 |
| ISSN号 | 0178-2762 |
| 关键词 | N addition Plant diversity Microbial community N-cycling genes Semiarid grassland |
| DOI | 10.1007/s00374-019-01344-z |
| 通讯作者 | Zhang, Chao(zhangchaolynn@163.com) ; Liu, Guobin(gbliu@ms.iswc.ac.cn) |
| 英文摘要 | In this study, changes in plant diversity and aboveground biomass, soil chemical properties, microbial biomass and respiration, microbial composition, and microbial N-cycling potential (represented by the abundance of genes involved in N reaction) were studied after 3years of urea fertilization (0, 25, 50, and 100kgNha(-1)year(-1)) in a semiarid grassland in China. The microbial composition and N-cycling genes were determined using metagenome sequencing. Urea fertilization significantly decreased soil bacterial diversity, possibly through its negative effect on plant diversity, whereas it increased fungal diversity, and microbial biomass and respiration through enhancing aboveground biomass production with increases in the C input into the soil. However, above the threshold N rate of 50kgNha(-1)year(-1), microbial biomass and respiration decreased probably because of a strong N inhibitory effect on aboveground biomass. Further, urea fertilization increased the gene abundances of narH, nrfA, nirB, and napA, which are involved in dissimilatory nitrate reduction, and those of nifH and nifD, involved in N-2 fixation, gdh, involved in organic N decomposition, and glnA, involved in glutamine synthesis and ureC. These findings suggested that urea addition has a positive effect on N-turnover potential. Burkholderiales and Rhizobiales play an important role in soil N cycling. Changes in plant community (diversity and biomass) were responsible for the shift in microbial diversity, biomass, and respiration, whereas alterations in inorganic N levels (exchangeable NH4+ and NO3-) potentially affected microbial N cycling. Our results show that N-mediated environmental stresses can play an important role in microbial diversity and functions, which appear to be mediated largely by plant-soil interactions. |
| WOS关键词 | NITROGEN-FERTILIZATION ; PLANT DIVERSITY ; COMMUNITY STRUCTURE ; FUNGAL COMMUNITIES ; EXTRACTION METHOD ; ENZYME-ACTIVITIES ; DEPOSITION ; RESPONSES ; GENE ; ADDITIONS |
| 资助项目 | National Natural Sciences Foundation of China[41771554] ; National Key Research and Development Program of China[2016YFC0501707] ; Key Technologies R&D Program of China[2015BAC01B03] |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| 出版者 | SPRINGER |
| WOS记录号 | WOS:000461142200004 |
| 资助机构 | National Natural Sciences Foundation of China ; National Key Research and Development Program of China ; Key Technologies R&D Program of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/49191]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zhang, Chao; Liu, Guobin |
| 作者单位 | 1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China 3.Hlth Time Gene Inst, Shenzhen 518000, Peoples R China 4.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Chao,Song, Zilin,Zhuang, Daohua,et al. Urea fertilization decreases soil bacterial diversity, but improves microbial biomass, respiration, and N-cycling potential in a semiarid grassland[J]. BIOLOGY AND FERTILITY OF SOILS,2019,55(3):229-242. |
| APA | Zhang, Chao,Song, Zilin,Zhuang, Daohua,Wang, Jie,Xie, Sisi,&Liu, Guobin.(2019).Urea fertilization decreases soil bacterial diversity, but improves microbial biomass, respiration, and N-cycling potential in a semiarid grassland.BIOLOGY AND FERTILITY OF SOILS,55(3),229-242. |
| MLA | Zhang, Chao,et al."Urea fertilization decreases soil bacterial diversity, but improves microbial biomass, respiration, and N-cycling potential in a semiarid grassland".BIOLOGY AND FERTILITY OF SOILS 55.3(2019):229-242. |
入库方式： OAI收割
来源：地理科学与资源研究所
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