QQ客服 官方微博 反馈留言

	A synthesis of the effect of grazing exclusion on carbon dynamics in grasslands in China
	Hu Z. M.; Li, S. G.; Guo, Q.; Niu, S. L.; He, N. P.; Li, L. H.; Yu, G. R.
	2016
关键词	biomass C dynamics grassland grazing exclusion soil carbon soil nitrogen steady state soil organic-carbon inner-mongolia northern china great-plains nitrogen storage steppe management vegetation rangelands
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 15years 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.
出处	Global Change Biology
卷	22
期	4
页	1385-1393
语种	英语
ISSN号	1354-1013
DOI标识	10.1111/gcb.13133
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/42982]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Hu Z. M.,Li, S. G.,Guo, Q.,et al. A synthesis of the effect of grazing exclusion on carbon dynamics in grasslands in China. 2016.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。