气候变化领域集成服务门户(CCPortal): Nitrogen, lignin, C/N as important regulators of gross nitrogen release and immobilization during litter decomposition in a temperate forest ecosystem

CCPortal

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 G.; Liu J.; Peng B.; Gao D.; Wang C.; Dai W.; Jiang P.; Bai E.
发表日期	2019
ISSN	0378-1127
起始页码	61
结束页码	69
卷号	440
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 15 N-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 -k 1 ∗x and y=a 2 ∗(1-e -k 2 ∗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. © 2019 Elsevier B.V.
英文关键词	Gross nitrogen release; Immobilization; Litter decomposition; Litter quality; Litter-derived nitrogen; Temperate forest
语种	英语
scopus关键词	Ecosystems; Lignin; Nitrogen; Radioactive waste vitrification; Controlling factors; Ecosystem functions; Lignin concentration; Litter decomposition; Litter quality; Nitrogen release; Temperate forest ecosystems; Temperate forests; Forestry; carbon; concentration (composition); decomposition; ecosystem function; field method; forest ecosystem; immobilization; lignin; litter; nitrogen; temperate forest; Concentration; Ecosystems; Forestry; Immobilization; Nitrogen; Release; Soil
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156072
作者单位	CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China; University of Chinese Academy of Sciences, Beijing, 100049, China; School of Geographical Sciences, Northeast Normal University, Changchun, 130024, China
推荐引用方式 GB/T 7714	Pei G.,Liu J.,Peng B.,et al. Nitrogen, lignin, C/N as important regulators of gross nitrogen release and immobilization during litter decomposition in a temperate forest ecosystem[J],2019,440.
APA	Pei G..,Liu J..,Peng B..,Gao D..,Wang C..,...&Bai E..(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.
MLA	Pei G.,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).