干旱区生态环境知识资源中心(Arid): Soil organic matter enhances aboveground biomass in alpine grassland under drought

Arid

DOI	10.1016/j.geoderma.2023.116430
	Soil organic matter enhances aboveground biomass in alpine grassland under drought
	Zhao, YunFei; Wang, Xia; Chen, Fei; Li, Jia; Wu, JinHong; Sun, YuXin; Zhang, YuanYe; Deng, Tao; Jiang, SiLong; Zhou, XiaoHe; Liu, HuiYing
通讯作者	Wang, X ; Chen, F
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2023
卷号	433
英文摘要	Increasing the resilience of plant productivity to drought is crucial for provisioning ecosystem services. Although soil organic matter (SOM) promotes plant growth, whether SOM mitigates aboveground biomass (AGB) loss due to drought in alpine grasslands remains unclear. Here, we evaluated the link between AGB and SOM across 209 alpine grassland sites along a 3,500-km aridity gradient on the Tibetan Plateau. We observed that AGB decreased in response to increasing aridity severity only when the aridity level was above a threshold of 0.37. We further found a stronger positive relationship between AGB and SOM in more arid conditions than in less arid ones, with an abrupt increase beyond an aridity threshold of 0.64. Our results confirm that SOM alleviates drought stress on AGB, mainly by reducing bulk density, increasing fine fraction aggregates, and increasing cation exchange capacity. The identified aridity thresholds and mechanisms emphasise the importance of soil carbon sequestration strategies for biomass production and climate change mitigation in arid areas.
英文关键词	Aboveground biomass Alpine grassland Drought Soil organic matter Tibetan Plateau
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000967104300001
WOS关键词	CARBON ; PRODUCTIVITY ; STABILITY ; AGGREGATE ; METAANALYSIS ; DEGRADATION ; RESPONSES ; WATER
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396690
推荐引用方式 GB/T 7714	Zhao, YunFei,Wang, Xia,Chen, Fei,et al. Soil organic matter enhances aboveground biomass in alpine grassland under drought[J],2023,433.
APA	Zhao, YunFei.,Wang, Xia.,Chen, Fei.,Li, Jia.,Wu, JinHong.,...&Liu, HuiYing.(2023).Soil organic matter enhances aboveground biomass in alpine grassland under drought.GEODERMA,433.
MLA	Zhao, YunFei,et al."Soil organic matter enhances aboveground biomass in alpine grassland under drought".GEODERMA 433(2023).