干旱区生态环境知识资源中心(Arid): What drives soil degradation after gravel mulching for 6 years in northwest China?

Arid

DOI	10.3389/fmicb.2023.1224195
	What drives soil degradation after gravel mulching for 6 years in northwest China?
	Qiu, Yang; Chen, Xingyi; Wang, Yajun; Zhang, Yubao; Xie, Zhongkui
通讯作者	Wang, YJ
来源期刊	FRONTIERS IN MICROBIOLOGY
EISSN	1664-302X
出版年	2023
卷号	14
英文摘要	Gravel mulch is an agricultural water conservation practice that has been widely used in the semi-arid region of northwest China, but its effectiveness is now lessening due to soil degradation caused by long-term gravel mulching. In this study, we report on a 6-year-long gravel mulch experiment conducted in the northwestern Loess Plateau to evaluate the impact of gravel mulch on soil physicochemical properties and microbial communities, with the objective of clarifying the causes of long-term gravel mulching-induced land degradation. After 6 years mulching, we found that gravel mulched soil contained significantly higher concentrations of total carbon and total organic carbon than non-mulched soil (control). Long-term gravel mulching significantly changed the soil microbial diversity and abundance distribution of bacterial and fungal communities. Notably, the relative abundance of Acidobacteria was significantly higher under gravel mulching than the control (no mulching), being significantly greater in the AG treatment (small-sized gravel, 2-5 mm) than all other treatments. Conversely, the relative abundance of Actinobacteria was significantly lower under gravel mulching than the control, being the lowest in the BG treatment (large-sized gravel, 40-60 mm). At the same time, the relative abundance of Bacteroidetes was significantly lower in AG yet higher in BG vis-a-vis the other treatments. Of the various factors examined, on a 6-year scale, the capture of dust by gravel mulch and altered carbon and nitrogen components in soil play major contributing roles in the compositional change of soil microorganisms. These results suggest that modified soil material input from gravel mulching may be the key factor leading to soil degradation. More long-term experimental studies at different sites are now needed to elucidate the mechanisms responsible for soil degradation under gravel mulching.
英文关键词	gravel mulch soil microbial community soil carbon long-term soil degradation
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:001040241200001
WOS关键词	LOESS PLATEAU ; SEMIARID REGION ; PEBBLE MULCH ; DIVERSITY ; COMMUNITY ; IRRIGATION
WOS类目	Microbiology
WOS研究方向	Microbiology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396571
推荐引用方式 GB/T 7714	Qiu, Yang,Chen, Xingyi,Wang, Yajun,et al. What drives soil degradation after gravel mulching for 6 years in northwest China?[J],2023,14.
APA	Qiu, Yang,Chen, Xingyi,Wang, Yajun,Zhang, Yubao,&Xie, Zhongkui.(2023).What drives soil degradation after gravel mulching for 6 years in northwest China?.FRONTIERS IN MICROBIOLOGY,14.
MLA	Qiu, Yang,et al."What drives soil degradation after gravel mulching for 6 years in northwest China?".FRONTIERS IN MICROBIOLOGY 14(2023).