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	Methods for estimating irrigation needs of spring wheat in the middle Heihe basin, China
	Zhao, CY; Nan, ZR; Cheng, GD
刊名	AGRICULTURAL WATER MANAGEMENT
	2005-07-01
卷号	75期号:1页码:54-70
关键词	reference crop evapotranspiration the middle Heihe River basin FAO-Penman equation geographical information system irrigation need crop-coefficient
ISSN号	0378-3774
通讯作者	Zhao, CY(nanzhr@lzb.ac.cn)
英文摘要	Understanding reference crop evapotranspiration (ET0) is essential in planning the most effective use of water resources in the and northwest China. The objective of the present work in the middle Heihe River basin were: (1) to determine the best model for calculating the areal distribution of reference crop evapotranspiration in this region, and (2) to estimate the spatial distribution of the irrigation requirements of spring wheat. Note that eight commonly used formulates were tested and that FAO-Penman was the best. The irrigation amount of spring wheat in 2000 was estimated by three steps. First, DEM-based and GIS-assisted methods were employed to estimate the spatial distribution of reference crop evapotranspiration (ET0) according to FAO-Penman model. Then, spring wheat evapotranspiration (ET) was calculated by ET0 and crop-coefficient (K-c). Finally, the maximum irrigation amount of spring wheat was estimated with the spring wheat evapotranspiration and precipitation in the different growing stage. The maximum irrigation has temporal-spatial variation. Temporally the irrigation amount appears the largest in June when it is the peak period of spring wheat development. The irrigation amount is the smallest in July because spring wheat was in late-season stage. In April, spring wheat was in seedling stage during which the water demand is also small. Spatially the irrigation amount increases from southeast to northwest. (c) 2004 Elsevier B.V. All rights reserved.
收录类别	SCI
WOS关键词	CROP ; TRANSPIRATION ; REGION ; MODEL
WOS研究方向	Agriculture ; Water Resources
WOS类目	Agronomy ; Water Resources
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000229455800005
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2555690
专题	寒区旱区环境与工程研究所
通讯作者	Zhao, CY
作者单位	1.Chinese Acad Sci, State Key Lab Frozen Soil Engn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China 2.Lanzhou Univ, Coll Earth & Environm Sci, Dept Environm Sci, Lanzhou 730000, Peoples R China 3.Lanzhou Univ, Natl Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Zhao, CY,Nan, ZR,Cheng, GD. Methods for estimating irrigation needs of spring wheat in the middle Heihe basin, China[J]. AGRICULTURAL WATER MANAGEMENT,2005,75(1):54-70.
APA	Zhao, CY,Nan, ZR,&Cheng, GD.(2005).Methods for estimating irrigation needs of spring wheat in the middle Heihe basin, China.AGRICULTURAL WATER MANAGEMENT,75(1),54-70.
MLA	Zhao, CY,et al."Methods for estimating irrigation needs of spring wheat in the middle Heihe basin, China".AGRICULTURAL WATER MANAGEMENT 75.1(2005):54-70.

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