干旱区生态环境知识资源中心(Arid): Gravel mulching effects on soil physicochemical properties and microbial community composition in the Loess Plateau, northwestern China

Arid

DOI	10.1016/j.ejsobi.2019.103115
	Gravel mulching effects on soil physicochemical properties and microbial community composition in the Loess Plateau, northwestern China
	Lv, Wencong 1,2; Qiu, Yang 1,2; Xie, Zhongkui 1,2; Wang, Xinping1,2 ; Wang, Yajun 1,2; Hua, Cuiping 1,2
通讯作者	Qiu, Yang
来源期刊	EUROPEAN JOURNAL OF SOIL BIOLOGY
ISSN	1164-5563
EISSN	1778-3615
出版年	2019
卷号	94
英文摘要	Gravel mulch has been used as an agricultural water conservation measure for over three hundred years in Chines semiarid regions. In this study, a 3-year gravel mulch experiment on slopes in the northwestern Loess Plateau was conducted to evaluate the impact that different sized gravel mulch and natural rainfall has on surface runoff, soil physicochemical properties and microbial communities. The following three treatments were investigated: small-sized gravel mulch (AG, 2-5 mm particle size), large-sized gravel mulch (BG, 40-60 mm particle size), and no gravel mulch as a control (CK). We found that gravel mulch could effectively control surface rainwater runoff, especially in the AG treatment. AG treated soil was typically oligotrophic compared to BG treated soil with higher soil carbon and nitrogen content. PCR-amplified 16S rRNA genes and internal transcribed spacer (ITS) sequencing showed that soil bacterial and fungal communities in the AG treatment differed from the BG treatment or the CK treatment, and soil bacterial and fungal richness and bacterial diversity changed significantly after mulching. The relative abundance of Acidobacteria, Actinobacteria, Ascomycota and Bacillus significantly increased and the relative abundance of Proteobacterla and Bacteroidetes significantly decreased in the AG treatment compared to the CK treatment. Furthermore, the relative abundance of Bacillus was significantly increased in the AG treatment and was slightly increased (not significant) in the BG treatment compared to the control. Redundancy analysis (RDA) revealed that soil carbon and available nutrients were important driving factors for changes in microbial communities. Overall, the capacity of runoff production suppression and soil bacterial diversity and richness were higher in the AG treatment than the other treatments. Therefore, small-sized gravel mulching is recommended for arid and semiarid areas.
英文关键词	Gravel mulching Surface runoff Soil nutrients Soil microbial community Loess Plateau
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000488309200007
WOS关键词	WATER-USE EFFICIENCY ; SEMIARID REGION ; FUNGAL COMMUNITIES ; HEAVY-METALS ; PEBBLE MULCH ; BACTERIAL ; IDENTIFICATION ; DIVERSITY ; GRADIENT ; BIOMASS
WOS类目	Ecology ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215595
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, 320 West Donggang Rd, Lanzhou 730030, Gansu, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Lv, Wencong,Qiu, Yang,Xie, Zhongkui,et al. Gravel mulching effects on soil physicochemical properties and microbial community composition in the Loess Plateau, northwestern China[J],2019,94.
APA	Lv, Wencong,Qiu, Yang,Xie, Zhongkui,Wang, Xinping,Wang, Yajun,&Hua, Cuiping.(2019).Gravel mulching effects on soil physicochemical properties and microbial community composition in the Loess Plateau, northwestern China.EUROPEAN JOURNAL OF SOIL BIOLOGY,94.
MLA	Lv, Wencong,et al."Gravel mulching effects on soil physicochemical properties and microbial community composition in the Loess Plateau, northwestern China".EUROPEAN JOURNAL OF SOIL BIOLOGY 94(2019).