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	Drip irrigation scheduling for tomatoes in unheated greenhouses
	Yuan B. Z. ; Kang Y. H. ; Nishiyama S.
	2001
英文摘要	During the last two decades, energy-saving solar greenhouses without heating systems, about 150-800 m(2) (width: 5-10 m, length: 30-80 m) in size, have been widely used in the North of China for vegetable production during cold seasons. The greenhouse is also suitable for use in other countries located in the temperate or warm-temperate zones, especially in the developing countries, because it is inexpensive with a simple structure, and does not need any additional energy for heating in winter. Drip irrigation has been recognized as a sensible method of supplying water inside the greenhouses, and a simple method for drip irrigation scheduling at low cost is urgently required. Using the water-balance method, the authors studied the water consumption of tomato (Lycopersicon esculentum Mill.) and the relationship between evapotranspiration and water surface evaporation measured with 20 cm pan. Research results show that there is no significant water flux at 0.75 in depth when soil water potential is kept higher than -20 kPa at 15 cm depth, and around 20 kPa at 60 cm depth. The accumulative value of evapotranspiration is approximately equal to the accumulative value of water surface evaporation measured using 20 cm pan. Further analysis found that 20 cm pan can be used to determine the water requirement of tomato drip irrigation scheduling in this type of greenhouse.
出处	Irrigation Science
卷	20
期	3
页	149-154
收录类别	SCI
语种	英语
ISSN号	0342-7188
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/22493]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Yuan B. Z.,Kang Y. H.,Nishiyama S.. Drip irrigation scheduling for tomatoes in unheated greenhouses. 2001.

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