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Nitrogen additions inhibit nitrification in acidic soils in a subtropical pine plantation: effects of soil pH and compositional shifts in microbial groups
Kou, Liang1; Zhang, Xinyu1; Wang, Huimin1,2,3; Yang, Hao1; Zhao, Wei1; Li, Shenggong1,2
2019-04-01
Source PublicationJOURNAL OF FORESTRY RESEARCH
ISSN1007-662X
Volume30Issue:2Pages:669-678
Corresponding AuthorLi, Shenggong(lisg@igsnrr.ac.cn)
AbstractPlantation forests play a pivotal role in carbon sequestration in terrestrial ecosystems, but enhanced nitrogen (N) deposition in these forests may affect plantation productivity by altering soil N cycling. Hence, understanding how simulated N deposition affects the rate and direction of soil N transformation is critically important in predicting responses of plantation productivity in the context of N loading. This study reports the effects of N addition rate (0, 40, and 120kgNha(-1)a(-1)) and form (NH4Cl vs. NaNO3) on net N mineralization and nitrification estimated by in situ soil core incubation and on-soil microbial biomass determined by the phospholipid fatty acid (PLFA) method in a subtropical pine plantation. N additions had no influences on net N mineralization throughout the year. Net nitrification rate was significantly reduced by additions of both NH4Cl (71.5) and NaNO3 (47.1%) during the active growing season, with the stronger inhibitory effect at high N rates. Soil pH was markedly decreased by 0.16 units by NH4Cl additions. N inputs significantly decreased the ratio of fungal-to-bacterial PLFAs on average by 0.28 (49.1%) in November. Under NH4Cl additions, nitrification was positively related with fungal biomass and soil pH. Under NaNO3 additions, nitrification was positively related with all microbial groups except for bacterial biomass. We conclude that simulated N deposition inhibited net nitrification in the acidic soils of a subtropical plantation forest in China, primarily due to accelerated soil acidification and compositional shifts in microbial functional groups. These findings may facilitate a better mechanistic understanding of soil N cycling in the context of N loading.
KeywordAcidification Atmospheric nitrogen deposition Microbial functional group Nitrification Soil nitrogen transformation
DOI10.1007/s11676-018-0645-2
WOS KeywordFOREST SOILS ; MINERALIZATION ; DEPOSITION ; CARBON ; FUNGAL ; TRANSFORMATIONS ; GLOBALIZATION ; CONSEQUENCES ; RESPIRATION ; TEMPERATURE
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Plan[2016YFD06000202] ; National Natural Science Foundation of China[31570443] ; National Natural Science Foundation of China[31130009]
Funding OrganizationNational Key Research and Development Plan ; National Natural Science Foundation of China
WOS Research AreaForestry
WOS SubjectForestry
WOS IDWOS:000460003900028
PublisherNORTHEAST FORESTRY UNIV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/49220
Collection中国科学院地理科学与资源研究所
Corresponding AuthorLi, Shenggong
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Jiangxi Prov Key Lab Ecosyst Proc & Informat, Taihe 343725, Peoples R China
Recommended Citation
GB/T 7714
Kou, Liang,Zhang, Xinyu,Wang, Huimin,et al. Nitrogen additions inhibit nitrification in acidic soils in a subtropical pine plantation: effects of soil pH and compositional shifts in microbial groups[J]. JOURNAL OF FORESTRY RESEARCH,2019,30(2):669-678.
APA Kou, Liang,Zhang, Xinyu,Wang, Huimin,Yang, Hao,Zhao, Wei,&Li, Shenggong.(2019).Nitrogen additions inhibit nitrification in acidic soils in a subtropical pine plantation: effects of soil pH and compositional shifts in microbial groups.JOURNAL OF FORESTRY RESEARCH,30(2),669-678.
MLA Kou, Liang,et al."Nitrogen additions inhibit nitrification in acidic soils in a subtropical pine plantation: effects of soil pH and compositional shifts in microbial groups".JOURNAL OF FORESTRY RESEARCH 30.2(2019):669-678.
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