DOI: 10.1111/gcb.13133
论文题名: A synthesis of the effect of grazing exclusion on carbon dynamics in grasslands in China
作者: Hu Z. ; Li S. ; Guo Q. ; Niu S. ; He N. ; Li L. ; Yu G.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2016
卷: 22, 期: 4 起始页码: 1385
结束页码: 1393
语种: 英语
英文关键词: Biomass
; C dynamics
; Grassland
; Grazing exclusion
; Soil carbon
; Soil nitrogen
; Steady state
Scopus关键词: biomass
; carbon dioxide
; carbon emission
; carbon sequestration
; grassland
; grazing
; humid environment
; soil carbon
; China
; carbon
; nitrogen
; soil
; biomass
; carbon sequestration
; chemistry
; China
; grassland
; herbivory
; plant
; soil
; Biomass
; Carbon
; Carbon Sequestration
; China
; Grassland
; Herbivory
; Nitrogen
; Plants
; Soil
英文摘要: Grazing exclusion (GE) is considered to be an effective approach to restore degraded grasslands and to improve their carbon (C) sequestration. However, the C dynamics and related controlling factors in grasslands with GE have not been well characterized. This synthesis examines the dynamics of soil C content and vegetation biomass with the recovery age through synthesizing results of 51 sites in grasslands in China. The results illustrate increases in soil C content and vegetation biomass with GE at most sites. Generally, both soil C content and vegetation biomass arrive at steady state after 15 years of GE. In comparison, the rates of increase in above- and belowground biomass declined exponentially with the age of GE, whereas soil C content declined in a milder (linear) way, implying a lagged response of soil C to the inputs from plant biomass. Mean annual precipitation (MAP) and the rate of soil nitrogen (N) change were the main factors affecting the rate of soil C content change. MAP played a major role at the early stage, whereas the rate of soil N change was the major contributor at the middle and late stages. Our results imply that the national grassland restoration projects in China may be more beneficial for C sequestration in humid regions with high MAP. In addition, increased soil N supply to grasslands with GE at the latter recovery stage may enhance ecosystem C sequestration capacity. © 2016 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61435
Appears in Collections: 影响、适应和脆弱性
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作者单位: Synthesis Research Center of Chinese Ecosystem Research Network, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China; Laboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Hu Z.,Li S.,Guo Q.,et al. A synthesis of the effect of grazing exclusion on carbon dynamics in grasslands in China[J]. Global Change Biology,2016-01-01,22(4)