Estimation of evapotranspiration and its components from an apple orchard in northwest China using sap flow and water balance methods

doi:10.1002/hyp.6284

	Estimation of evapotranspiration and its components from an apple orchard in northwest China using sap flow and water balance methods
	Gong, Daozhi; Kang, Shaozhong; Yao, Limin; Zhang, Lu
刊名	HYDROLOGICAL PROCESSES
	2007
卷号	21 期号:7 页码:931-938
关键词	apple (Malus pumila Mill.) crop coefficient K-c evapotranspiration leaf area index LAI micro-lysimeter sap flow transpiration water stress coefficient K-s
ISSN号	0885-6087
DOI	10.1002/hyp.6284
通讯作者	Gong, Daozhi
英文摘要	Field experiments were conducted to investigate the effects of leaf area index and soil moisture content on evapotranspiration and its components within an apple orchard in northwest China for 2 years. Evapotranspiration in the non-rainfall period was estimated using two approaches: the soil water balance method based on tube-type time-domain reflection measurements, and sap flow plus micro-lysimeter methods. The two methods were in good agreement, with differences usually less than 10%. The components of evapotranspiration varied with canopy development. During spring and autumn, soil evaporation was dominating as result of low leaf area index. In summer, plant transpiration became significant, with an average transpiration to evapotranspiration ratio of 0.87. The crop coefficient K-c showed a strong linear dependence on leaf area index. The water stress coefficient K-s was around 1.0 when soil moisture was above 23% and started to decrease linearly after that. This study demonstrates that prediction of evapotranspiration in apple orchards can be made using the Food and Agriculture Organization's crop coefficient method from commonly available meteorological data in the area. Copyright (c) 2006 John Wiley & Sons, Ltd.
学科主题	Water Resources ; WATER RESOURCES
语种	英语
出版者	JOHN WILEY & SONS LTD
WOS记录号	WOS:000245595000008
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/19987]
专题	农业环境与可持续发展研究所
作者单位	(1)China Agr Univ, Ctr Agr Water Res, Beijing 100083, Peoples R China;(2)NW A&F Univ, Key Lab Agr Soil & Water Engn Arid & Semiarid Are, Minist Educ, Shaanxi 712100, Peoples R China;(3)Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Gong, Daozhi,Kang, Shaozhong,Yao, Limin,et al. Estimation of evapotranspiration and its components from an apple orchard in northwest China using sap flow and water balance methods[J]. HYDROLOGICAL PROCESSES,2007,21(7):931-938.
APA	Gong, Daozhi,Kang, Shaozhong,Yao, Limin,&Zhang, Lu.(2007).Estimation of evapotranspiration and its components from an apple orchard in northwest China using sap flow and water balance methods.HYDROLOGICAL PROCESSES,21(7),931-938.
MLA	Gong, Daozhi,et al."Estimation of evapotranspiration and its components from an apple orchard in northwest China using sap flow and water balance methods".HYDROLOGICAL PROCESSES 21.7(2007):931-938.