Efficiency of wheat straw mulching in reducing soil and water losses from three typical soils of the Loess Plateau, China

doi:10.1016/j.iswcr.2019.08.003

	Efficiency of wheat straw mulching in reducing soil and water losses from three typical soils of the Loess Plateau, China
	Rahma, Abbas E.1,2; Warrington, David N.4; Lei, Tingwu 3,4
刊名	INTERNATIONAL SOIL AND WATER CONSERVATION RESEARCH
	2019-12-01
卷号	7 期号:4 页码:335-345
关键词	Straw mulch Soil losses Runoff Rain simulator
ISSN号	2095-6339
DOI	10.1016/j.iswcr.2019.08.003
通讯作者	Lei, Tingwu(leitingwu@cau.edu.cn)
英文摘要	Mulching the soil surface with a layer of plant residue is considered an effective method of conserving water and soil because it increases water infiltration into the soil, reduces surface runoff and the soil erosion, and reduces flow velocity and the sediment carrying capacity of overland flow. However, application of plant residues increases operational costs and so optimal levels of mulch in order to prevent soil and/or water losses should be used according to the soil type and rainfall and slope conditions. In this study, the effect of wheat straw mulch rate on the total runoff and total soil losses from 60-mm simulated rainstorms was assessed for two intensive rainfalls (90 and 180 mm h(-1)) on three slope gradients typical conditions on the Loess Plateau of China and elsewhere. For short slopes (1 m), the optimal mulch rate to save water for a silt loam and a loam soil was 0.4 kg m(-2). However, for a clay loam soil the mulch rate of 0.4 kg m(-2) would be optimal only under the 90 mm h(-1) rainfall; 0.8 kg m(-2) was required for the 180 mm h(-1). In order to save soil, a mulch rate of 0.2 kg m(-2) on the silt loam slopes prevented 60%-80% of the soil losses. For the loam soil, mulch at the rate of 0.4 kg m(-2) was essential in most cases in order to reduce soil losses substantially. For the clay loam, 0.4 kg m(-2) may be optimal under the 90 mm h(-1) rain, but 0.8 kg m(-2) may be required for the 180 mm h(-1) rainstorm. These optimal values would also need to be considered alongside other factors since the mulch may have value if used elsewhere. Hence doubling the optimal mulch rate for the silt loam soil from 0.2 kg m(-2) or the clay loam soil under 90 mm h(-1) rainfall from 0.4 kg m(-2) in order to achieve a further 10% reduction in soil loss needs to be assessed in that context. Therefore, Optimal mulch rate can be an effective approach to virtually reduce costs or to maximize the area that can be treated. Meantime, soil conservationist should be aware that levels of mulch for short slopes might not be suitable for long slopes. (C) 2019 International Research and Training Center on Erosion and Sedimentation and China Water and Power Press. Production and Hosting by Elsevier B.V.
资助项目	National Natural Science Foundation of China[41230746] ; National Natural Science Foundation of China[51621061]
WOS关键词	AGGREGATE STABILITY ; EROSION PROCESSES ; ORGANIC-MATTER ; SURFACE RUNOFF ; SLOPE GRADIENT ; HYDROLOGIC CONNECTIVITY ; RAINFALL INTERCEPTION ; DEPRESSIONAL STORAGE ; SIMULATED RAINFALL ; INTERRILL EROSION
WOS研究方向	Environmental Sciences & Ecology ; Agriculture ; Water Resources
语种	英语
出版者	KEAI PUBLISHING LTD
WOS记录号	WOS:000489768900003
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/129582]
专题	中国科学院地理科学与资源研究所
通讯作者	Lei, Tingwu
作者单位	1.Sudan Univ Sci & Technol, Coll Agr Studies, Dept Agr Engn, Khartoum, Sudan 2.Shandong Agr Univ, Coll Water Conservancy & Civil Engn, Tai An 271018, Shandong, Peoples R China 3.China Agr Univ, Coll Water Resources & Civil Engn, Beijing 100083, Peoples R China 4.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Fanning Loess P, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Rahma, Abbas E.,Warrington, David N.,Lei, Tingwu. Efficiency of wheat straw mulching in reducing soil and water losses from three typical soils of the Loess Plateau, China[J]. INTERNATIONAL SOIL AND WATER CONSERVATION RESEARCH,2019,7(4):335-345.
APA	Rahma, Abbas E.,Warrington, David N.,&Lei, Tingwu.(2019).Efficiency of wheat straw mulching in reducing soil and water losses from three typical soils of the Loess Plateau, China.INTERNATIONAL SOIL AND WATER CONSERVATION RESEARCH,7(4),335-345.
MLA	Rahma, Abbas E.,et al."Efficiency of wheat straw mulching in reducing soil and water losses from three typical soils of the Loess Plateau, China".INTERNATIONAL SOIL AND WATER CONSERVATION RESEARCH 7.4(2019):335-345.