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	Rainwater-harvesting agriculture and water-use efficiency in semi-arid regions in Gansu province, China
	Liu, FM; Wu, YQ; Xiao, HL; Gao, QZ
刊名	OUTLOOK ON AGRICULTURE
	2005-09-01
卷号	34期号:3页码:159-165
关键词	rainwater-harvesting agriculture water-use efficiency rainwater-use efficiency complementary irrigation semi-arid regions China
ISSN号	0030-7270
通讯作者	Liu, FM(mayl@mail.gsinfo.net.cn)
英文摘要	In and and semi-arid ecosystems, the efficient use of water becomes increasingly important because water is a crucial limiting factor for increased food and fibre production to supply an ever growing number of people. Rainwater-harvesting agriculture (RHA) is a system that has the potential to deal with the water constraints that farmers in China's semi-arid regions face. RHA can supply limited irrigation at the key stages of crop development by using rainwater stored in containers such as tanks or cellars. A number of tests of RHA in selected experimental sites confirm its potential for significantly increasing agricultural productivity. In test plots, average yields of maize (Zea mays) and wheat (Triticum aestivum L.) increased by over 50%. This paper reviews the development and performance of RHA, based on studies of the usefulness of rainwater for agriculture, theory and practice of RHA, improvement of crop yields and water-use efficiency (WUE) and its potential role in alleviating or eliminating poverty and land degradation in semi-arid regions of Gansu province. One concept, namely harvested rainwater-use efficiency (HWUE) is put forward, and the relationship between WUE and HWUE is analysed using schematic relationships between grain yield and evapotranspiration (ET). The value of HWUE is greater than that of WUE when the compensatory harvested rainwater is supplied at critical stages for water requirements in rainfed croplands. This is the basis of RHA theory. RHA has identified a new technical system that is characterized by the combination Of terracing, plastic-film cover, varieties, fertilization, water storage in cellars or tanks and micro-irrigation for increasing dryland-farming productivity. It is suggested that RHA has great potential for enhancing water availability, reducing water loss, producing more with the same amount of annual rainfall and increasing agricultural productivity in north-west China. There is no doubt that the implementation of RHA techniques will expand, and can help local farmers to solve the problem of water shortage and to achieve self-sufficiency in grain.
收录类别	SCI
WOS关键词	SEDIMENT CONTROL ; GRAIN-YIELD ; WHEAT ; DROUGHT ; SOIL ; CONSERVATION ; IRRIGATION ; STRESS ; GROWTH
WOS研究方向	Agriculture
WOS类目	Agriculture, Multidisciplinary
语种	英语
出版者	I P PUBLISHING LTD
WOS记录号	WOS:000232882100004
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2555668
专题	寒区旱区环境与工程研究所
通讯作者	Liu, FM
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Liu, FM,Wu, YQ,Xiao, HL,et al. Rainwater-harvesting agriculture and water-use efficiency in semi-arid regions in Gansu province, China[J]. OUTLOOK ON AGRICULTURE,2005,34(3):159-165.
APA	Liu, FM,Wu, YQ,Xiao, HL,&Gao, QZ.(2005).Rainwater-harvesting agriculture and water-use efficiency in semi-arid regions in Gansu province, China.OUTLOOK ON AGRICULTURE,34(3),159-165.
MLA	Liu, FM,et al."Rainwater-harvesting agriculture and water-use efficiency in semi-arid regions in Gansu province, China".OUTLOOK ON AGRICULTURE 34.3(2005):159-165.

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