The effects of nitrogen addition on soil organic carbon decomposition and microbial C-degradation functional genes abundance in a Pinus tabulaeformis forest

doi:10.1016/j.foreco.2021.119098

	The effects of nitrogen addition on soil organic carbon decomposition and microbial C-degradation functional genes abundance in a Pinus tabulaeformis forest
	Jing, Hang 1; Li, Jingjing 1,3; Yan, Benshuai 2; Wei, Furong 1; Wang, Guoliang 1,2; Liu, Guobin 1,2
刊名	FOREST ECOLOGY AND MANAGEMENT
	2021-06-01
卷号	489 页码:11
关键词	Nitrogen addition C-cycling functional genes SOC-degrading enzyme activity Soil CO2 emission Soil organic carbon decomposition
ISSN号	0378-1127
DOI	10.1016/j.foreco.2021.119098
通讯作者	Wang, Guoliang(glwang@nwsuaf.edu.cn)
英文摘要	Nitrogen (N) deposition affects soil organic carbon (SOC) decomposition, therefore altering the global terrestrial carbon (C) cycle. However, it remains unclear how N deposition affects SOC decomposition by regulating microbial community composition and function, especially C-cycling functional gene composition. We investigated the effects of N addition (0, 3, 6, and 9 g N m(-2) y(-1)) on the composition of soil microbial C-cycling functional gene, SOC-degrading enzyme activities, and CO2 emissions in a Pinus tabulaeformis forest. Under low N addition (3 or 6 g N m(-2) y(-1)), labile C-degradation gene abundances were significantly increased. Under high N addition (9 g N m(-2) y(-1)), C-cycling functional gene abundance and diversity were significantly decreased. These effects were related to the changes in soil NO3--N, dissolved organic C, total N, and microbial biomass C contents. Furthermore, low N addition stimulated the activities of SOC-degrading enzyme and CO2 emissions, whereas high N addition had the inhibitory effect. C-degradation gene abundances were significantly correlated with the SOC-degrading enzyme activities and CO2 emissions. Increase in CO2 emission rates were related to the high microbial functional potentials for labile C degradation under low N addition, whereas the lower CO2 emission rates were related to the low microbial functional potentials for labile as well as recalcitrant C degradation under high N addition. Our study indicated that N deposition may change SOC decomposition by altering the abundance of labile C and recalcitrant C degradation genes.
资助项目	National Natural Science Foundation of China[41671513] ; National Key Research and Development Program of China[2017YFC0504601]
WOS研究方向	Forestry
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000636266800004
资助机构	National Natural Science Foundation of China ; National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/161882]
专题	中国科学院地理科学与资源研究所
通讯作者	Wang, Guoliang
作者单位	1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 3.Minist Water Resources, Upper & Middle Yellow River Bur, Yellow River Conservancy Commiss, Xian 710021, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Jing, Hang,Li, Jingjing,Yan, Benshuai,et al. The effects of nitrogen addition on soil organic carbon decomposition and microbial C-degradation functional genes abundance in a Pinus tabulaeformis forest[J]. FOREST ECOLOGY AND MANAGEMENT,2021,489:11.
APA	Jing, Hang,Li, Jingjing,Yan, Benshuai,Wei, Furong,Wang, Guoliang,&Liu, Guobin.(2021).The effects of nitrogen addition on soil organic carbon decomposition and microbial C-degradation functional genes abundance in a Pinus tabulaeformis forest.FOREST ECOLOGY AND MANAGEMENT,489,11.
MLA	Jing, Hang,et al."The effects of nitrogen addition on soil organic carbon decomposition and microbial C-degradation functional genes abundance in a Pinus tabulaeformis forest".FOREST ECOLOGY AND MANAGEMENT 489(2021):11.