干旱区生态环境知识资源中心(Arid): The role of water conservation strategies and benchmark ecotopes for increasing yields in South Africa's semi-arid croplands

Arid

DOI	10.17159/wsa/2019.v45.i3.6736
	The role of water conservation strategies and benchmark ecotopes for increasing yields in South Africa's semi-arid croplands
	Hensley, Malcolm 1; le Roux, Pieter A. L.1; Botha, J. Jacobus 2; van Rensburg, Leon D.1
通讯作者	Botha, J. Jacobus
来源期刊	WATER SA
ISSN	0378-4738
EISSN	1816-7950
出版年	2019
卷号	45 期号:3 页码:393-399
英文摘要	Recently published results regarding South Africa's cropping potential show that about one third of the arable land is of low potential, located mainly in semi-arid areas, with the main problem being water shortage. This is therefore an appropriate time to review priorities and procedures, for selecting benchmark ecotopes to represent marginal areas, and for research needs with regard to water conservation strategies to mitigate the problems of low yields. Relevant international principles encapsulated in the words agro-ecology, sustainability and socio-economic conditions, are discussed. Relevant new technologies are described, namely: digital soil mapping that will facilitate the identification of benchmark ecotopes; a stochastic procedure to predict rainfall intensity data from daily rainfall that will facilitate runoff predictions; a crop yield cumulative probability procedure that enables sustainability to be described quantitatively. As a case study, results from a successful field experiment using the infield rainwater harvesting production technique on benchmark ecotopes in a semi-arid area, inhabited by subsistence farmers, are presented. The objectives of the study, procedures used and the method of expressing the results are recommended as guidelines for contributing towards mitigating the problem of low crop productivity across a large portion of the arable area in South Africa.
英文关键词	water conservation benchmark ecotopes semi-arid areas subsistence farmers infield rainwater harvesting
类型	Article
语种	英语
国家	South Africa
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000478725200010
WOS关键词	RAINFALL-RUNOFF RELATIONSHIPS ; REGOSOL ECOTOPE
WOS类目	Water Resources
WOS研究方向	Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/219301
作者单位	1.Univ Free State, Dept Soil Crop & Climate Sci, POB 339, ZA-9300 Bloemfontein, South Africa; 2.Agr Res Council, Inst Soil Climate & Water, Private Bag X01, ZA-9360 Glen, South Africa
推荐引用方式 GB/T 7714	Hensley, Malcolm,le Roux, Pieter A. L.,Botha, J. Jacobus,et al. The role of water conservation strategies and benchmark ecotopes for increasing yields in South Africa's semi-arid croplands[J],2019,45(3):393-399.
APA	Hensley, Malcolm,le Roux, Pieter A. L.,Botha, J. Jacobus,&van Rensburg, Leon D..(2019).The role of water conservation strategies and benchmark ecotopes for increasing yields in South Africa's semi-arid croplands.WATER SA,45(3),393-399.
MLA	Hensley, Malcolm,et al."The role of water conservation strategies and benchmark ecotopes for increasing yields in South Africa's semi-arid croplands".WATER SA 45.3(2019):393-399.