Methods to Estimate Lettuce Evapotranspiration in Greenhouse Conditions in the Central Zone of Chile

This study evaluates five methods to estimate crop evapotranspiration in greenhouse conditions. It compares their performance in relation to the evapotranspiration directly determined from water balance measurements (ETlys) in an irrigated lettuce (Lactuca sativa L.) crop during 9 weeks. Daily value...

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Autores principales:	Casanova P,Manuel, Messing,Ingmar, Joel,Abraham, Cañete M,Alberto
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2009
Materias:	evapotranspiration greenhouse lettuce lysimeter
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000100008
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spelling	oai:scielo:S0718-583920090001000082018-10-01Methods to Estimate Lettuce Evapotranspiration in Greenhouse Conditions in the Central Zone of ChileCasanova P,ManuelMessing,IngmarJoel,AbrahamCañete M,Alberto evapotranspiration greenhouse lettuce lysimeter This study evaluates five methods to estimate crop evapotranspiration in greenhouse conditions. It compares their performance in relation to the evapotranspiration directly determined from water balance measurements (ETlys) in an irrigated lettuce (Lactuca sativa L.) crop during 9 weeks. Daily values of the reference evapotranspiration (ETo) from Class A pan (CAP), Piche atmometers (ATM), Andersson evaporimeters (ANE), FAO-Radiation (FRE) and FAO-Penman-Monteith (PME) equations were compared. The methods showed similar temporal variations but at different ranges as follows: ANE < CAP < FRE < PME < ATM. Furthemore, ETo had a clear correlation with solar radiation. Crop coefficients (Kc = ETlys/ETo) varied somewhat amongst the methods, but trends were identified for two periods: in the first week, the overall mean Kc was 0.3 (± 0.1) and in weeks 2 to 9 on average 0.6 (± 0.3). The greenhouse values of Kc were lower than those generally adopted for lettuce in field conditions. In terms of irrigation design, crop evapotranspiration can be estimated by the methods in this study, on the condition that the appropriate crop coefficients are applied. The fact that ANE showed values closest to those of ETlys, along with cost and management convenience, makes it an advantageous alternative as compared to the other methods.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.69 n.1 20092009-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000100008en10.4067/S0718-58392009000100008
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	evapotranspiration greenhouse lettuce lysimeter
spellingShingle	evapotranspiration greenhouse lettuce lysimeter Casanova P,Manuel Messing,Ingmar Joel,Abraham Cañete M,Alberto Methods to Estimate Lettuce Evapotranspiration in Greenhouse Conditions in the Central Zone of Chile
description	This study evaluates five methods to estimate crop evapotranspiration in greenhouse conditions. It compares their performance in relation to the evapotranspiration directly determined from water balance measurements (ETlys) in an irrigated lettuce (Lactuca sativa L.) crop during 9 weeks. Daily values of the reference evapotranspiration (ETo) from Class A pan (CAP), Piche atmometers (ATM), Andersson evaporimeters (ANE), FAO-Radiation (FRE) and FAO-Penman-Monteith (PME) equations were compared. The methods showed similar temporal variations but at different ranges as follows: ANE < CAP < FRE < PME < ATM. Furthemore, ETo had a clear correlation with solar radiation. Crop coefficients (Kc = ETlys/ETo) varied somewhat amongst the methods, but trends were identified for two periods: in the first week, the overall mean Kc was 0.3 (± 0.1) and in weeks 2 to 9 on average 0.6 (± 0.3). The greenhouse values of Kc were lower than those generally adopted for lettuce in field conditions. In terms of irrigation design, crop evapotranspiration can be estimated by the methods in this study, on the condition that the appropriate crop coefficients are applied. The fact that ANE showed values closest to those of ETlys, along with cost and management convenience, makes it an advantageous alternative as compared to the other methods.
author	Casanova P,Manuel Messing,Ingmar Joel,Abraham Cañete M,Alberto
author_facet	Casanova P,Manuel Messing,Ingmar Joel,Abraham Cañete M,Alberto
author_sort	Casanova P,Manuel
title	Methods to Estimate Lettuce Evapotranspiration in Greenhouse Conditions in the Central Zone of Chile
title_short	Methods to Estimate Lettuce Evapotranspiration in Greenhouse Conditions in the Central Zone of Chile
title_full	Methods to Estimate Lettuce Evapotranspiration in Greenhouse Conditions in the Central Zone of Chile
title_fullStr	Methods to Estimate Lettuce Evapotranspiration in Greenhouse Conditions in the Central Zone of Chile
title_full_unstemmed	Methods to Estimate Lettuce Evapotranspiration in Greenhouse Conditions in the Central Zone of Chile
title_sort	methods to estimate lettuce evapotranspiration in greenhouse conditions in the central zone of chile
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2009
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000100008
work_keys_str_mv	AT casanovapmanuel methodstoestimatelettuceevapotranspirationingreenhouseconditionsinthecentralzoneofchile AT messingingmar methodstoestimatelettuceevapotranspirationingreenhouseconditionsinthecentralzoneofchile AT joelabraham methodstoestimatelettuceevapotranspirationingreenhouseconditionsinthecentralzoneofchile AT canetemalberto methodstoestimatelettuceevapotranspirationingreenhouseconditionsinthecentralzoneofchile
_version_	1714205266077024256

Methods to Estimate Lettuce Evapotranspiration in Greenhouse Conditions in the Central Zone of Chile

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