干旱区生态环境知识资源中心(Arid): Grazing alters sandy soil greenhouse gas emissions in a sand-binding area of the Hobq Desert, China

Arid

DOI	10.1007/s40333-022-0095-8
	Grazing alters sandy soil greenhouse gas emissions in a sand-binding area of the Hobq Desert, China
	Wang Bo; Li Yuwei; Bao Yuhai
通讯作者	Li, YW
来源期刊	JOURNAL OF ARID LAND
ISSN	1674-6767
EISSN	2194-7783
出版年	2022
卷号	14 期号:5 页码:576-588
英文摘要	Deserts are sensitive to environmental changes caused by human interference and are prone to degradation. Revegetation can promote the reversal of desertification and the subsequent formation of fixed sand. However, the effects of grazing, which can cause the ground-surface conditions of fixed sand to further deteriorate and result in re-desertification, on the greenhouse gas (GHG) fluxes from soils remain unknown. Herein, we investigated GHG fluxes in the Hobq Desert, Inner Mongolia Autonomous Region of China, at the mobile (desertified), fixed (vegetated), and grazed (re-desertified) sites from January 2018 to December 2019. We analyzed the response mechanism of GHG fluxes to micrometeorological factors and the variation in global warming potential (GWP). CO2 was emitted at an average rate of 4.2, 3.7, and 1.1 mmol/(m(2)center dot h) and N2O was emitted at an average rate of 0.19, 0.15, and 0.09 mu mol/(m2 center dot h) at the grazed, fixed, and mobile sites, respectively. Mean CH4 consumption was as follows: fixed site (2.9 mu mol/(m(2)center dot h))>grazed site (2.7 mu mol/(m(2)center dot h))>mobile site (1.1 mu mol/(m(2)center dot h)). GHG fluxes varied seasonally, and soil temperature (10 cm) and soil water content (30 cm) were the key micrometeorological factors affecting the fluxes. The changes in the plant and soil characteristics caused by grazing resulted in increased soil CO2 and N2O emissions and decreased CH4 absorption. Grazing also significantly increased the GWP of the soil (P<0.05). This study demonstrates that grazing on revegetated sandy soil can cause re-desertification and significantly increase soil carbon and nitrogen leakage. These findings could be used to formulate informed policies on the management and utilization of desert ecosystems.
英文关键词	grazing revegetation re-desertification greenhouse gases global warming potential Hobq Desert
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000800766100008
WOS关键词	CO2 EFFLUX ; CARBON ; RESPIRATION ; GRASSLAND ; METHANE ; N2O ; VARIABILITY ; NITROGEN ; FLUXES ; BUDGET
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393321
推荐引用方式 GB/T 7714	Wang Bo,Li Yuwei,Bao Yuhai. Grazing alters sandy soil greenhouse gas emissions in a sand-binding area of the Hobq Desert, China[J],2022,14(5):576-588.
APA	Wang Bo,Li Yuwei,&Bao Yuhai.(2022).Grazing alters sandy soil greenhouse gas emissions in a sand-binding area of the Hobq Desert, China.JOURNAL OF ARID LAND,14(5),576-588.
MLA	Wang Bo,et al."Grazing alters sandy soil greenhouse gas emissions in a sand-binding area of the Hobq Desert, China".JOURNAL OF ARID LAND 14.5(2022):576-588.