干旱区生态环境知识资源中心(Arid): Grazing exclusion facilitates more rapid ecosystem carbon sequestration of degraded grasslands in humid than in arid regions

Arid

DOI	10.1016/j.agee.2023.108553
	Grazing exclusion facilitates more rapid ecosystem carbon sequestration of degraded grasslands in humid than in arid regions
	Wang, Hu; Li, Yizhu; He, Yuchen; Chen, Han Y. H.; Liu, Xinbao; Gao, Yue; Zhu, Weiyun; Xu, Jiangguo; Li, Youjiang; Chen, Zhangyuan; Sun, Xiao
通讯作者	Sun, X
来源期刊	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN	0167-8809
EISSN	1873-2305
出版年	2023
卷号	353
英文摘要	Grazing exclusion has been proposed as an effective practice to enhance ecosystem carbon stocks in arid-semiarid degraded grasslands. However, in humid regions, the effects of grazing exclusion on ecosystem carbon stocks and their components in degraded grasslands remain largely unknown. Here, the effects of enclosure on ecosystem carbon stocks and their components were explored using four enclosure ages, each paired with adjacent grazed areas. Moreover, the results were synthesized with previous studies to test if enclosure's effects in semihumid-humid regions differed from those in arid-semiarid regions. The field experiment found that six months to 1 year of grazing exclusion sequestrated 14.6 % higher carbon in the enclosed grasslands than in paired-grazed grasslands as a consequence of increased carbon storage of plants and topsoils. However, compared to grazed areas, enclosures over 3-6 years contained 14.4 % less ecosystem carbon stocks, primarily due to markedly decreased soil carbon sequestration, despite increased plant carbon stocks. Structural equation models further suggested that the decrease in soil carbon stock might be owing to the decomposition of organic matter induced by low phosphorus. Additionally, compared with the northern slope of the mountain, ecosystem carbon stocks on the southern slope showed a lagged and weak response to grazing exclusion. The results, combined with a meta -analysis, revealed that plant and soil carbon stocks in semihumid-humid grasslands were more sensitive to enclosure than in arid-semiarid grasslands. These results highlight that short-term fencing (e.g., six months to 1 year), rather than long-term, is a practical strategy to foster degraded grassland ecosystem carbon sequestration in semihumid-humid regions, thus contributing to climate change mitigation.
英文关键词	Enclosure age Degraded grassland Plant carbon stock Soil carbon stock Soil stoichiometry Topography
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001054505700001
WOS关键词	SOIL ORGANIC-CARBON ; SLOPE ASPECT ; LOESS PLATEAU ; SPECIES COMPOSITION ; PLANT DIVERSITY ; RIVER-BASIN ; NITROGEN ; PRODUCTIVITY ; MANAGEMENT ; STOICHIOMETRY
WOS类目	Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395118
推荐引用方式 GB/T 7714	Wang, Hu,Li, Yizhu,He, Yuchen,et al. Grazing exclusion facilitates more rapid ecosystem carbon sequestration of degraded grasslands in humid than in arid regions[J],2023,353.
APA	Wang, Hu.,Li, Yizhu.,He, Yuchen.,Chen, Han Y. H..,Liu, Xinbao.,...&Sun, Xiao.(2023).Grazing exclusion facilitates more rapid ecosystem carbon sequestration of degraded grasslands in humid than in arid regions.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,353.
MLA	Wang, Hu,et al."Grazing exclusion facilitates more rapid ecosystem carbon sequestration of degraded grasslands in humid than in arid regions".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 353(2023).