干旱区生态环境知识资源中心(Arid): Rainfall risk and the potential of reduced tillage systems to conserve soil water in semi-arid cropping systems of southern Africa

Arid

DOI	10.3934/agrfood.2016.1.85
	Rainfall risk and the potential of reduced tillage systems to conserve soil water in semi-arid cropping systems of southern Africa
	Mupangwa, W.; Walker, S.; Masvaya, E.; Magombeyi, M.; Munguambe, P.
通讯作者	Mupangwa, W
来源期刊	AIMS AGRICULTURE AND FOOD
ISSN	2471-2086
出版年	2016
卷号	1 期号:1 页码:85-101
英文摘要	Improvement of household food security in the Limpopo Basin has been elusive due to a combination of factors related to information and market constraints, but also farmers' risk aversion induced by the high variability of rainfall during the growing season. The purpose of this study was to (1) characterize the rainfall and growing season patterns experienced by smallholder farmers, and (2) measure soil water dynamics in ripper and basin tillage systems being promoted in the semi-arid Limpopo Basin of southern Africa. The results show that the second half of the growing season receives more rainfall than the first half in the Limpopo Basin. However, rainfall is more variable during the January-March than the October-December period. Growing seasons start earlier and end later in the Mozambique part of the basin which is closer to the Indian Ocean. The Limpopo Basin is prone to two and three week dry spells with chances of 14 day spells higher (34-42%) than the 21 day spells (8-12%). The chances of 14 and 21 day dry spells increase substantially during the second half of the growing season. The 1980-1990 was one of the driest decades in the Limpopo Basin. Planting basin system conserved more soil water on sandy loam (18-24%) and clay loam (4-12%) soils than the conventional practice during flowering and grain filling maize growth stages. Ripper had 17-29% more soil water than conventional practice during flowering and grain filling maize growth stages. There is a high risk of dry spells and soil water deficits in smallholder cropping systems of the Limpopo basin. There is therefore scope in promoting rain and soil water management technologies, and good land husbandry in order to reduce risk of crop failure in the smallholder cropping systems.
英文关键词	drought dry spell Limpopo Basin rainfed agriculture risk
类型	Article
语种	英语
开放获取类型	DOAJ Gold, Green Accepted
收录类别	ESCI
WOS记录号	WOS:000394112300007
WOS关键词	SUB-SAHARAN AFRICA ; CLIMATE-CHANGE ; MAIZE ; VARIABILITY ; MANAGEMENT ; DROUGHT ; FARMERS ; YIELD ; PRODUCTIVITY ; SEASON
WOS类目	Agriculture, Multidisciplinary ; Agronomy
WOS研究方向	Agriculture
Scopus学科分类	Int Maize & Wheat Improvement Ctr CIMMYT, ILRI Sholla Campus,POB 5689, Addis Ababa, Ethiopia. ; Mupangwa, W
CSCD记录号	CSCD:Univ Free State, Dept Soil Crop & Climate Sci, Bloemfontein, South Africa.
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/2XILL650/331783
作者单位	[Mupangwa, W.; Masvaya, E.] Int Crops Res Inst Semi Arid Trop, POB 776, Bulawayo, Zimbabwe; [Mupangwa, W.] Int Maize & Wheat Improvement Ctr CIMMYT, ILRI Sholla Campus,POB 5689, Addis Ababa, Ethiopia; [Mupangwa, W.; Walker, S.] Univ Free State, Dept Soil Crop & Climate Sci, Bloemfontein, South Africa; [Magombeyi, M.] Univ Witwatersrand, Sch Civil & Environm Engn, Private Bag X3, ZA-2050 Johannesburg, South Africa; [Munguambe, P.] Univ Eduardo Mondlane, Fac Agron & Forest Engn, POB 257, Maputo, Mozambique
推荐引用方式 GB/T 7714	Mupangwa, W.,Walker, S.,Masvaya, E.,et al. Rainfall risk and the potential of reduced tillage systems to conserve soil water in semi-arid cropping systems of southern Africa[J]. International Crops Research Institute for the Semi-Arid Tropics,2016,1(1):85-101.
APA	Mupangwa, W.,Walker, S.,Masvaya, E.,Magombeyi, M.,&Munguambe, P..(2016).Rainfall risk and the potential of reduced tillage systems to conserve soil water in semi-arid cropping systems of southern Africa.AIMS AGRICULTURE AND FOOD,1(1),85-101.
MLA	Mupangwa, W.,et al."Rainfall risk and the potential of reduced tillage systems to conserve soil water in semi-arid cropping systems of southern Africa".AIMS AGRICULTURE AND FOOD 1.1(2016):85-101.