气候变化领域集成服务门户(CCPortal): Impacts of management practices on soil organic carbon in degraded alpine meadows on the Tibetan Plateau

CCPortal

DOI	10.5194/bg-11-3495-2014
	Impacts of management practices on soil organic carbon in degraded alpine meadows on the Tibetan Plateau
	Chang, X. F.; Zhu, X. X.; Wang, S. P.; Cui, S. J.; Luo, C. Y.; Zhang, Z. H.; Wilkes, A.
通讯作者	Wang, SP (通讯作者)
发表日期	2014
ISSN	1726-4170
EISSN	1726-4189
起始页码	3495
结束页码	3503
卷号	11 期号:13
英文摘要	Grassland soil organic carbon (SOC) is sensitive to anthropogenic activities. Increased anthropogenic disturbance related to overgrazing has led to widespread alpine grassland degradation on the Tibetan Plateau. The degraded grasslands are considered to have great potential for carbon sequestration after adoption of improved management practices. Here, we calibrated and employed the Century model to investigate the effects of overgrazing and improved managements on the SOC dynamics in alpine meadows. We calibrated the Century model against plant productivity at the Haibei Research Station. SOC stocks for validation were obtained in 2009-2010 from degraded alpine meadows in two communes. We found that Century model can successfully capture grassland SOC changes. Overall, our simulation suggests that degraded alpine meadow SOC significantly increased with the advent of restoration management from 2011 to 2030. Carbon sequestration rates ranged between 0.04 Mg C ha(-1) yr(-1) in lightly degraded winter grazing grasslands and 2.0 Mg C ha(-1) yr(-1) in moderately degraded summer grazing grasslands. Our modelling work also predicts that improve management in degraded Tibetan grasslands will contribute to an annual carbon sink of 0.022-0.059 Pg C yr(-1). These results imply that restoration of degraded grasslands in the Tibetan Plateau has great potential for soil carbon sequestration to mitigate greenhouse gases.
关键词	TERRESTRIAL ECOSYSTEMS GRASSLAND MANAGEMENT CHINA DYNAMICS STEPPE SYSTEMS 1980S MODEL
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology
WOS类目	Ecology ; Geosciences, Multidisciplinary
WOS记录号	WOS:000339265800005
来源期刊	BIOGEOSCIENCES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258349
推荐引用方式 GB/T 7714	Chang, X. F.,Zhu, X. X.,Wang, S. P.,et al. Impacts of management practices on soil organic carbon in degraded alpine meadows on the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2014,11(13).
APA	Chang, X. F..,Zhu, X. X..,Wang, S. P..,Cui, S. J..,Luo, C. Y..,...&Wilkes, A..(2014).Impacts of management practices on soil organic carbon in degraded alpine meadows on the Tibetan Plateau.BIOGEOSCIENCES,11(13).
MLA	Chang, X. F.,et al."Impacts of management practices on soil organic carbon in degraded alpine meadows on the Tibetan Plateau".BIOGEOSCIENCES 11.13(2014).