Nitrogen additions inhibit nitrification in acidic soils in a subtropical pine plantation: effects of soil pH and compositional shifts in microbial groups

doi:10.1007/s11676-018-0645-2

	Nitrogen additions inhibit nitrification in acidic soils in a subtropical pine plantation: effects of soil pH and compositional shifts in microbial groups
	Kou, Liang 1; Zhang, Xinyu 1; Wang, Huimin 1,2,3; Yang, Hao 1; Zhao, Wei 1; Li, Shenggong 1,2
刊名	JOURNAL OF FORESTRY RESEARCH
	2019-04-01
卷号	30 期号:2 页码:669-678
关键词	Acidification Atmospheric nitrogen deposition Microbial functional group Nitrification Soil nitrogen transformation
ISSN号	1007-662X
DOI	10.1007/s11676-018-0645-2
通讯作者	Li, Shenggong(lisg@igsnrr.ac.cn)
英文摘要	Plantation 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.
资助项目	National Key Research and Development Plan[2016YFD06000202] ; National Natural Science Foundation of China[31570443] ; National Natural Science Foundation of China[31130009]
WOS关键词	FOREST SOILS ; MINERALIZATION ; DEPOSITION ; CARBON ; FUNGAL ; TRANSFORMATIONS ; GLOBALIZATION ; CONSEQUENCES ; RESPIRATION ; TEMPERATURE
WOS研究方向	Forestry
语种	英语
出版者	NORTHEAST FORESTRY UNIV
WOS记录号	WOS:000460003900028
资助机构	National Key Research and Development Plan ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/49219]
专题	中国科学院地理科学与资源研究所
通讯作者	Li, Shenggong
作者单位	1.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
推荐引用方式 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.