Arid
DOI10.1016/j.pce.2011.06.011
Dead level contours and infiltration pits for risk mitigation in smallholder cropping systems of southern Zimbabwe
Mupangwa, W.1,2; Twomlow, S.1; Walker, S.2
通讯作者Mupangwa, W.
来源期刊PHYSICS AND CHEMISTRY OF THE EARTH
ISSN1474-7065
出版年2012
卷号47-48页码:166-172
英文摘要

The persistent droughts, dry spells, and chronic food insecurity in semi-arid areas necessitate the introduction of more robust rainwater harvesting and soil water management technologies. The study reported here was conducted to assess the influence of dead level contours and infiltration pits on in-field soil water dynamics over two growing seasons. A transect consisting of six access tubes, spaced at 5 m interval, was established across each dead level contour with or without an infiltration pit before the onset of the rains. Two access tubes were installed upslope of the contour while four tubes were installed on the downslope side. Dead level contours with infiltration pits captured more rainwater than dead level contours only resulting in more lateral soil water movement. Significant lateral soil water movement was detected at 3 m downslope following rainfall events of 60-70 mm/day. The 0.2-0.6 m soil layer benefited more from the lateral soil water movement at all the farms. Our results suggest that dead level contours have to be constructed at 3-8 m spacing for crops to benefit from the captured rainwater. It is probably worth exploring strip cropping of food and fodder crops on the downslope of the dead level contours and infiltration pits using the current design of these between-field structures. With the advent of in situ rainwater harvesting techniques included in some conservation agriculture practices it will benefit smallholder cropping systems in semi-arid areas if these between-field structures are promoted concurrently with other sustainable land management systems such as conservation agriculture. (C) 2011 Elsevier Ltd. All rights reserved.


英文关键词Drought Dry spells Seasonal rainfall Smallholder farming Soil water dynamics
类型Article
语种英语
国家Zimbabwe ; South Africa
收录类别SCI-E
WOS记录号WOS:000307683400019
WOS关键词CLIMATE-CHANGE ; WATER ; AFRICA ; TILLAGE
WOS类目Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences ; Water Resources
WOS研究方向Geology ; Meteorology & Atmospheric Sciences ; Water Resources
来源机构International Crops Research Institute for the Semi-Arid Tropics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/174397
作者单位1.Int Crops Res Inst Semi Arid Trop, Matopos Res Stn, Bulawayo, Zimbabwe;
2.Univ Free State, Dept Soil Crop & Climate Sci, ZA-9300 Bloemfontein, South Africa
推荐引用方式
GB/T 7714
Mupangwa, W.,Twomlow, S.,Walker, S.. Dead level contours and infiltration pits for risk mitigation in smallholder cropping systems of southern Zimbabwe[J]. International Crops Research Institute for the Semi-Arid Tropics,2012,47-48:166-172.
APA Mupangwa, W.,Twomlow, S.,&Walker, S..(2012).Dead level contours and infiltration pits for risk mitigation in smallholder cropping systems of southern Zimbabwe.PHYSICS AND CHEMISTRY OF THE EARTH,47-48,166-172.
MLA Mupangwa, W.,et al."Dead level contours and infiltration pits for risk mitigation in smallholder cropping systems of southern Zimbabwe".PHYSICS AND CHEMISTRY OF THE EARTH 47-48(2012):166-172.
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