干旱区生态环境知识资源中心(Arid): Evapotranspiration and crop coefficients from lysimeter measurements for sprinkler-irrigated canola

Arid

DOI	10.1016/j.agwat.2020.106260
	Evapotranspiration and crop coefficients from lysimeter measurements for sprinkler-irrigated canola
	Lopez-Urrea, R.; Sanchez, J. M.; de la Cruz, F.; Gonzalez-Piqueras, J.; Chavez, J. L.
通讯作者	Lopez-Urrea, R
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2020
卷号	239
英文摘要	Canola is a water-stress tolerant crop, which could be an alternative in areas with limited water resources. However, in arid and semi-arid environments where rainfall events are scarce and increasingly erratic, the use of irrigation is necessary for canola production to reach its maximum yield. The goal of this study was to determine the crop evapotranspiration (ETc) and crop coefficients of sprinkler irrigated canola (Brassica napus L.) under non-limiting soil water content conditions. A 2-year field experiment was conducted in the lysimeter facility located in Albacete (SE Spain). A large weighing lysimeter (2.7 x 2.3 x 1.7 m), with an accuracy of 0.04 mm equivalent water depth, was used to measure the daily crop evapotranspiration (ETc) rate throughout two growing seasons. ETc values were determined using daily mass change in the lysimeter. Cumulative ETc was replaced in the lysimeter through sprinkler irrigation applications, thus crop water stress was avoided. Seasonal lysimeter based (measured) canola ETc was 472 and 602 mm in 2008 and 2012, respectively. The 28 % higher ETc value in 2012 was mainly due to a much higher evaporative demand during the crop growth mid-season period of 2012. The K-c values were determined using grass reference evapotranspiration (ETo) calculated with the FAO56 Penman-Monteith equation and the ETc calculations from the lysimeter data. The dual crop coefficient approach was used to separate crop transpiration (K-cb) from soil evaporation (K-e). For the two canola seasons, mid-season K-c and K-cb values, after FAO56 climate adjustment, were K-c mid (std) = 1.15 and K-cb mid (std) = 1.11. Those values were reached coinciding with maximum fraction of ground cover (f(c)) values of up 0.95 and 0.97 for 2008 and 2012, respectively. The seasonal evaporation component for sprinkler-irrigated canola was estimated to be about 24 % and 19 % of ETc in 2008 and 2012, respectively. The good linear relationship found between canola K-cb values and f(c) and the excellent agreement found between remotely sensed vegetation indices (VIs) and different biophysical parameters, such as K-cb and f(c), will allow monitoring and estimating the spatially distributed water requirements of canola at field and regional scales using multispectral satellite imagery.
英文关键词	ET partitioning Single and dual crop coefficient Standard climate Canopy cover Vegetation indices FAO56 approach
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000539092600010
WOS关键词	WATER PRODUCTIVITY ; VEGETATION INDEXES ; SOIL-WATER ; BALANCE ; GROWTH ; COVER ; EVAPORATION ; VALIDATION ; COTTON ; MODEL
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
来源机构	Colorado State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324685
作者单位	[Lopez-Urrea, R.; de la Cruz, F.] Inst Tecn Agron Prov ITAP, Parque Empresarial Campollano,2 Avda,61, Albacete 02007, Spain; [Sanchez, J. M.; Gonzalez-Piqueras, J.] Univ Castilla La Mancha, Reg Dev Inst IDR, Dept Appl Phys, Av Espana S-N, Albacete 02071, Spain; [Chavez, J. L.] Colorado State Univ, Dept Civil & Environm Engn, 1372 Campus Delivery, Ft Collins, CO 80523 USA
推荐引用方式 GB/T 7714	Lopez-Urrea, R.,Sanchez, J. M.,de la Cruz, F.,et al. Evapotranspiration and crop coefficients from lysimeter measurements for sprinkler-irrigated canola[J]. Colorado State University,2020,239.
APA	Lopez-Urrea, R.,Sanchez, J. M.,de la Cruz, F.,Gonzalez-Piqueras, J.,&Chavez, J. L..(2020).Evapotranspiration and crop coefficients from lysimeter measurements for sprinkler-irrigated canola.AGRICULTURAL WATER MANAGEMENT,239.
MLA	Lopez-Urrea, R.,et al."Evapotranspiration and crop coefficients from lysimeter measurements for sprinkler-irrigated canola".AGRICULTURAL WATER MANAGEMENT 239(2020).