干旱区生态环境知识资源中心(Arid): Soil Erodibility and Physicochemical Properties of Collapsing Gully Alluvial Fans in Southern China

Arid

DOI	10.1016/S1002-0160(15)60105-9
	Soil Erodibility and Physicochemical Properties of Collapsing Gully Alluvial Fans in Southern China
	Deng Yusong 1,2; Shen Xue 3; Xia Dong 1; Cai Chongfa 1; Ding Shuwen 1; Wang Tianwei 1
通讯作者	Ding Shuwen ; Wang Tianwei
来源期刊	PEDOSPHERE
ISSN	1002-0160
EISSN	2210-5107
出版年	2019
卷号	29 期号:1 页码:102-113
英文摘要	In southern China, collapsing gully erosion produces massive deposits of sediment on the plough layer of alluvial fan farmland, leading to reduced nutrients, increased erodibility, and even desertification. The aim of this study was to investigate soil erodibility (the factor K in the universal Soil Loss Equation, USLE) and physicochemical properties of the alluvial fans of the most severe collapsing gully erosion areas (Hubei, Jiangxi, Fujian, and Guangdong provinces) in southern China. The soils of the collapsing gully alluvial fans had a higher bulk density, but a lower total porosity, saturated water content, and silt and clay fractions than the control (CK) soils from the farmland without desertification. Soil quality gradually decreased from fan edge to fanhead. Significant decreases were found in soil pH, organic matter, cation exchange capacity, and total potassium, nitrogen, and phosphorus, as well as available nitrogen, phosphorus, and potassium, resulting in a gradual decrease in soil nutrients from the fanedge to the fanhead. Soil erodibility was greatest in the fanhead, and soil erodibility K values of the alluvial fans were 53.71%, 66.28%, 67.53%, and 71.68 % greater than that in those of the CK soils of Hubei, Jiangxi, Fujian, and Guangdong, respectively, indicating a significant correlation between the soil erodibility K values and physicochemical properties, particularly sand fraction and organic matter content. The results provide new insights into the relationship between soil physicochemical properties and erodibility of alluvial fans, and suggest that improving soil structure might increase soil fertility in the collapsing gully alluvial fan farmland.
英文关键词	soil erosion soil fertility soil property soil quality soil structure
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000457093900011
WOS关键词	CATION-EXCHANGE CAPACITY ; ORGANIC-MATTER ; AVAILABLE NITROGEN ; EROSION ; CARBON ; REDISTRIBUTION ; MANAGEMENT ; IMPACT ; MAIZE
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/2XILL650/217886
作者单位	1.Huazhong Agr Univ, Coll Resources & Environm, Minist Agr, Key Lab Arable Land Conservat Middle & Lower Reac, Wuhan 430070, Hubei, Peoples R China; 2.Guangxi Univ, Forestry Coll, Nanning 530004, Peoples R China; 3.Huazhong Agr Univ, Coll Econ & Management, Wuhan 430070, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Deng Yusong,Shen Xue,Xia Dong,et al. Soil Erodibility and Physicochemical Properties of Collapsing Gully Alluvial Fans in Southern China[J],2019,29(1):102-113.
APA	Deng Yusong,Shen Xue,Xia Dong,Cai Chongfa,Ding Shuwen,&Wang Tianwei.(2019).Soil Erodibility and Physicochemical Properties of Collapsing Gully Alluvial Fans in Southern China.PEDOSPHERE,29(1),102-113.
MLA	Deng Yusong,et al."Soil Erodibility and Physicochemical Properties of Collapsing Gully Alluvial Fans in Southern China".PEDOSPHERE 29.1(2019):102-113.