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Urea fertilization decreases soil bacterial diversity, but improves microbial biomass, respiration, and N-cycling potential in a semiarid grassland
Zhang, Chao1; Song, Zilin2; Zhuang, Daohua3; Wang, Jie1; Xie, Sisi3; Liu, Guobin1,4
2019-04-01
Source PublicationBIOLOGY AND FERTILITY OF SOILS
ISSN0178-2762
Volume55Issue:3Pages:229-242
Corresponding AuthorZhang, Chao(zhangchaolynn@163.com) ; Liu, Guobin(gbliu@ms.iswc.ac.cn)
AbstractIn 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.
KeywordN addition Plant diversity Microbial community N-cycling genes Semiarid grassland
DOI10.1007/s00374-019-01344-z
WOS KeywordNITROGEN-FERTILIZATION ; PLANT DIVERSITY ; COMMUNITY STRUCTURE ; FUNGAL COMMUNITIES ; EXTRACTION METHOD ; ENZYME-ACTIVITIES ; DEPOSITION ; RESPONSES ; GENE ; ADDITIONS
Indexed BySCI
Language英语
Funding ProjectNational Natural Sciences Foundation of China[41771554] ; National Key Research and Development Program of China[2016YFC0501707] ; Key Technologies R&D Program of China[2015BAC01B03]
Funding OrganizationNational Natural Sciences Foundation of China ; National Key Research and Development Program of China ; Key Technologies R&D Program of China
WOS Research AreaAgriculture
WOS SubjectSoil Science
WOS IDWOS:000461142200004
PublisherSPRINGER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/49192
Collection中国科学院地理科学与资源研究所
Corresponding AuthorZhang, Chao; Liu, Guobin
Affiliation1.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
Recommended Citation
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.
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