干旱区生态环境知识资源中心(Arid): Water use and irrigation requirements for date palms on commercial farms in the hyper-arid United Arab Emirates

Arid

DOI	10.1016/j.agwat.2019.105702
	Water use and irrigation requirements for date palms on commercial farms in the hyper-arid United Arab Emirates
	Al-Muaini, Ahmed; Green, Steve; Abou Dahr, Wasel Abdelwahid; Kennedy, Lesley; Kemp, Peter; Dawoud, Mohamed; Clothier, Brent
通讯作者	Clothier, B (corresponding author), New Zealand Inst Plant & Food Res Ltd, Palmerston North, New Zealand.
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2019
卷号	223
英文摘要	The production of dates in the hyper-arid deserts of the United Arab Emirates (UAE) is economically and culturally important. All of the commercial date palms need to be irrigated, and the prime source of this water is groundwater. However the quantity and quality of the groundwater resources in the UAE are being compromised by groundwater extraction at 25 times the rate of recharge, and a rise in salinity as the reserves dwindle. Rates of groundwater use on commercial farms need to be the minimum required for date production and the leaching of salts from the rootzone. We have shown that tree water use, ETc, can be predicted from 0.95 LI x ETo where LI is the fraction of incoming visible light intercepted by the canopy, and ETo is the reference evapotranspiration. We now surveyed 10 commercial date farms in Abu Dhabi and determined the LI of date canopies by proximal sensing with a light-stick across a range of tree densities, tree ages, and groundwater salinities. We were able to link LI to the fractional ground cover, FGC, obtained by analysis of satellite images. Thus it was possible to determine ETc of date palms across all of these commercial farms, and potentially all the UAE. The median ETc of the 10 farms was 70 kL y(-1), which was about twice that observed in our experiments at a research station near Dubai. Some 10% of the trees on these commercial farms were predicted to use over 100 kL y(-1). It is suggested that irrigation should be at 1.5 x ETc to account for a 25% factor-of-safety, and a 25% salt-leaching fraction. Reductions in irrigation would be achieved by more aggressive pruning of the fronds to reduce LI, and hence ETc, without compromising date yield.
英文关键词	Date-palm water-use Commercial date production Canopy characteristics Proximal sensing Remote sensing
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000495460400028
WOS关键词	SALINE GROUNDWATER
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369838
作者单位	[Al-Muaini, Ahmed; Abou Dahr, Wasel Abdelwahid; Dawoud, Mohamed] Environm Agcy Abu Dhabi EAD, Abu Dhabi, U Arab Emirates; [Green, Steve; Clothier, Brent] New Zealand Inst Plant & Food Res Ltd, Palmerston North, New Zealand; [Kennedy, Lesley] Maven Int, Wellington, New Zealand; [Al-Muaini, Ahmed; Kemp, Peter] Massey Univ, Palmerston North, New Zealand
推荐引用方式 GB/T 7714	Al-Muaini, Ahmed,Green, Steve,Abou Dahr, Wasel Abdelwahid,et al. Water use and irrigation requirements for date palms on commercial farms in the hyper-arid United Arab Emirates[J],2019,223.
APA	Al-Muaini, Ahmed.,Green, Steve.,Abou Dahr, Wasel Abdelwahid.,Kennedy, Lesley.,Kemp, Peter.,...&Clothier, Brent.(2019).Water use and irrigation requirements for date palms on commercial farms in the hyper-arid United Arab Emirates.AGRICULTURAL WATER MANAGEMENT,223.
MLA	Al-Muaini, Ahmed,et al."Water use and irrigation requirements for date palms on commercial farms in the hyper-arid United Arab Emirates".AGRICULTURAL WATER MANAGEMENT 223(2019).