气候变化领域集成服务门户(CCPortal): Temporal dynamics of Pinus tabulaeformis litter decomposition under nitrogen addition on the Loess Plateau of China

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DOI	10.1016/j.foreco.2020.118465
	Temporal dynamics of Pinus tabulaeformis litter decomposition under nitrogen addition on the Loess Plateau of China
	Jing H.; Wang G.
发表日期	2020
ISSN	0378-1127
卷号	476
英文摘要	Litter decomposition in the early stage is determined by the release of easily decomposable substances, and that in the later stage is controlled by the contents of macromolecule compounds and microorganisms according to the two-stage model. However, the specific mechanism on how nitrogen (N) deposition changes litter decomposition on the basis of this model remains unknown. This study investigated the effects of multilevel N addition (control, low, medium, and high N amounts corresponding to 0, 3, 6, and 9 g N m−2 y−1, respectively) on the litter decomposition and nutrient release of Pinus tabulaeformis and the microbial community in the later stage on the Loess Plateau of China. Results were as follows. (1) N addition significantly increased the decomposition rate of P. tabulaeformis litter (P < 0.05) with the maximum value observed in the medium N treatment. (2) The release rates of soluble sugar, lignin, carbon (C), and N were significantly promoted by N addition with the best promotion effect found for medium N. Cellulose release was significantly inhibited by N addition, and medium N had the greatest inhibitory effect. (3) N addition had an insignificant effect on microbial community in later-stage decomposition but had significant influence on the relative abundances of Ascomycota, Zygomycota, and Davidiellaceae fungi. (4) Decomposition was controlled by the release of N, soluble sugar, and lignin in the early stage, and C release and three dominant fungal populations played important roles in the late stage. We conclude that the variations in N deposition, litter nutrient release and microbial community are important factors of decomposition and C flux in a forest ecosystem. © 2020 Elsevier B.V.
英文关键词	Decomposition; Leaf litter; Mass loss; Microbial community; Nitrogen; Nutrient release
语种	英语
scopus关键词	Deposition; Ecosystems; Landforms; Lignin; Nitrogen; Nutrients; Sediments; Decomposition rate; Litter decomposition; Loess plateau of chinas; Microbial communities; Nitrogen additions; Pinus tabulaeformis; Promotion effects; Relative abundance; Microorganisms; coniferous tree; decomposition; forest ecosystem; fungus; litter; microbial activity; microbial community; relative abundance; soil microorganism; soil nitrogen; temporal analysis; Deposition; Ecosystems; Nitrogen; Nutrients; Sediments; China; Loess Plateau; Ascomycota; Fungi; Pinus tabuliformis; Zygomycota
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/154999
作者单位	State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi Province 712100, China; Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Yangling, Shaanxi 712100, China
推荐引用方式 GB/T 7714	Jing H.,Wang G.. Temporal dynamics of Pinus tabulaeformis litter decomposition under nitrogen addition on the Loess Plateau of China[J],2020,476.
APA	Jing H.,&Wang G..(2020).Temporal dynamics of Pinus tabulaeformis litter decomposition under nitrogen addition on the Loess Plateau of China.Forest Ecology and Management,476.
MLA	Jing H.,et al."Temporal dynamics of Pinus tabulaeformis litter decomposition under nitrogen addition on the Loess Plateau of China".Forest Ecology and Management 476(2020).