Nitrogen, lignin, C/N as important regulators of gross nitrogen release and immobilization during litter decomposition in a temperate forest ecosystem

doi:10.1016/j.foreco.2019.03.001

	Nitrogen, lignin, C/N as important regulators of gross nitrogen release and immobilization during litter decomposition in a temperate forest ecosystem
	Pei, Guangting 1,2; Liu, Jun 1,2; Peng, Bo 1,2; Gao, Decai 3; Wang, Chao 1; Dai, Weiwei 1; Jiang, Ping 1; Bai, Edith 1,3
刊名	FOREST ECOLOGY AND MANAGEMENT
	2019-05-15
卷号	440 页码:61-69
关键词	Litter decomposition Litter quality Gross nitrogen release Immobilization Litter-derived nitrogen Temperate forest
ISSN号	0378-1127
DOI	10.1016/j.foreco.2019.03.001
英文摘要	Litter decomposition plays an important role in nutrient cycling and ecosystem functions. Although litter quality has been considered as an important factor of decomposition rate, how litter quality regulates the gross nitrogen (N) fluxes (release and immobilization) remains unclear. Here, we conducted a field study of litter decomposition using N-15-labeled litter. We found that the temporal patterns of gross N release and immobilization were best described by the one-pool model y = 100 - a(1) * e(-k1)(x) and y = a(2) (1 - e(-k2)*(x)), respectively, which could help us better predict the gross N fluxes during litter decomposition. We also found that litter with higher initial N or lower initial lignin concentration had higher gross N release rate, which is consistent with their effects on litter mass loss. Initial C/N ratio was the most important factor determining gross N immobilization rate. Gross N release was mainly regulated by N concentration during the initial stage (0-0.5 years) of decomposition dominated by leaching process, but was mainly regulated by lignin concentration during the second stage (0.5-2.25 years). Gross N immobilization was positively correlated with N concentration during the initial stage of decomposition, but was positively correlated with C/N ratio during the second stage. Furthermore, litter with higher gross N release rate contributed more to soil N pools and to N losses from the litter-soil system. Our study highlights the different controlling factors of N release and immobilization at different stages of litter decomposition and helps better estimation and management of forest N fluxes and productivity.
资助项目	National Key R&D Program of China[2016YFA0600804] ; Youth Innovation Promotion Association CAS, China[2018231] ; National Program for Support of Top-notch Young Professionals
WOS研究方向	Forestry
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000464297900007
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/124035]
专题	中国科学院沈阳应用生态研究所
通讯作者	Bai, Edith
作者单位	1.Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Shenyang 110016, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Northeast Normal Univ, Sch Geog Sci, Changchun 130024, Peoples R China
推荐引用方式 GB/T 7714	Pei, Guangting,Liu, Jun,Peng, Bo,et al. Nitrogen, lignin, C/N as important regulators of gross nitrogen release and immobilization during litter decomposition in a temperate forest ecosystem[J]. FOREST ECOLOGY AND MANAGEMENT,2019,440:61-69.
APA	Pei, Guangting.,Liu, Jun.,Peng, Bo.,Gao, Decai.,Wang, Chao.,...&Bai, Edith.(2019).Nitrogen, lignin, C/N as important regulators of gross nitrogen release and immobilization during litter decomposition in a temperate forest ecosystem.FOREST ECOLOGY AND MANAGEMENT,440,61-69.
MLA	Pei, Guangting,et al."Nitrogen, lignin, C/N as important regulators of gross nitrogen release and immobilization during litter decomposition in a temperate forest ecosystem".FOREST ECOLOGY AND MANAGEMENT 440(2019):61-69.