<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0379-3982</journal-id>
<journal-title><![CDATA[Revista Tecnología en Marcha]]></journal-title>
<abbrev-journal-title><![CDATA[Tecnología en Marcha]]></abbrev-journal-title>
<issn>0379-3982</issn>
<publisher>
<publisher-name><![CDATA[Instituto Tecnológico de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0379-39822023000300065</article-id>
<article-id pub-id-type="doi">10.18845/tm.v36i3.6240</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evapotranspiración de referencia, evapotranspiración real y el coeficiente de cultivo para el cultivo de cebolla (Allium cepa) c.v. Álvara promedio en invernadero]]></article-title>
<article-title xml:lang="en"><![CDATA[Reference evapotranspiration, actual evapotranspiration and crop coefficient for onion (Allium cepa) c.v. Alvara average in greenhouse]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chavarría-Vidal]]></surname>
<given-names><![CDATA[Adrián Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Morales-Sánchez]]></surname>
<given-names><![CDATA[Mario]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Soto-Bravo]]></surname>
<given-names><![CDATA[Freddy]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Tecnológico de Costa Rica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Profesor jubilado  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Costa Rica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<volume>36</volume>
<numero>3</numero>
<fpage>65</fpage>
<lpage>77</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0379-39822023000300065&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0379-39822023000300065&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0379-39822023000300065&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La necesidad de conocer el consumo de agua que un cultivo tiene en el transcurso de su periodo vegetativo sea este anual o perenne, es fundamental debido al cambio climático en desarrollo el cual manifiesta tanto una baja en la cantidad de agua precipitada en diferentes zonas de nuestro país como una concentración de estas precipitaciones. Además, es necesario ser eficiente y eficaz en el uso del recurso hídrico para riego en la agricultura tanto en ambientes abiertos como protegidos y por medio de ello, procurar el desarrollo sostenible. Para lograr esto, es menester conocer los valores de evapotranspiración de referencia, evapotranspiración real y el coeficiente del cultivo con el fin de estimar y proyectar aplicaciones de agua por medio de sistemas de riego lo más ajustadas a la realidad posible. Por generaciones se ha utilizado valores del coeficiente del cultivo independientemente del método matemático de estimación de la evapotranspiración de referencia sin conocer si existen diferencias o no en los resultados obtenidos en los consumos de agua estimados. No obstante, por medio de métodos matemáticos de estimación de la evapotranspiración de referencia utilizando datos de la humedad relativa, temperatura y radiación solar dentro de un invernadero, se encontró diferencia significativa en los valores del coeficiente del cultivo. En las metodologías de Ivanov y Camargo no se encontró diferencia significativa entre ellos pero si se encontró diferencias significativas (0,05) con respecto a las metodologías de Benavidez, Linacre, Hargreaves y Turc; las metodologías de Benavidez y Linacre presentaron diferencias significativa (0,05) tanto entre ellos y como con respecto a las metodologías de Ivanov, Camargo, Hargreaves y Turc; y Hargreaves y Turc no presentaron diferencia significativa entre ellos pero si se encontró diferencias significativas (0,05) con respecto a las metodologías de Ivanov, Camargo, Benavidez y Linacre.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The need to know the water consumption of a crop during its vegetative period, be it annual or perennial, is fundamental due to the climate change underway, which manifests both a decrease in the amount of precipitation in different areas of our country and a concentration of this precipitation. In addition, it is necessary to be efficient and effective in the use of water resources for irrigation in agriculture, both in open and protected environments, and thus to strive for sustainable development. To achieve this, it is necessary to know the values of reference evapotranspiration, actual evapotranspiration and crop coefficient in order to estimate and project water applications through irrigation systems as close to reality as possible. For generations, crop coefficient values of a crop have been used independently of the mathematical method of estimating reference evapotranspiration without knowing whether or not there are differences in the results obtained in the estimated water consumptions. However, by means of mathematical methods for estimating reference evapotranspiration using data on relative humidity, temperature and solar radiation inside a greenhouse, a significant difference in crop coefficient values was found. The methodologies of Ivanov and Camargo did not show significant differences (0,05) with respect to the methodologies of Benavidez, Linacre, Hargreaves and Turc; the methodologies of Benavidez and Linacre presented significant differences (0,05) both among them and with respect to the methodologies of Ivanov, Camargo, Hargreaves and Turc; and Hargreaves and Turc did not present significant differences among them but significant differences (0,05) were found with respect to the methodologies of Ivanov, Camargo, Benavidez and Linacre.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Evapotranspiración de referencia]]></kwd>
<kwd lng="es"><![CDATA[consumo de agua]]></kwd>
<kwd lng="es"><![CDATA[evapotranspiración real]]></kwd>
<kwd lng="es"><![CDATA[cebolla]]></kwd>
<kwd lng="es"><![CDATA[invernadero]]></kwd>
<kwd lng="es"><![CDATA[recurso hídrico]]></kwd>
<kwd lng="es"><![CDATA[coeficiente del cultivo]]></kwd>
<kwd lng="en"><![CDATA[Reference evapotranspiration]]></kwd>
<kwd lng="en"><![CDATA[water consumption]]></kwd>
<kwd lng="en"><![CDATA[actual evapotranspiration]]></kwd>
<kwd lng="en"><![CDATA[onion]]></kwd>
<kwd lng="en"><![CDATA[greenhause]]></kwd>
<kwd lng="en"><![CDATA[hidric resource]]></kwd>
<kwd lng="en"><![CDATA[crop coefficient]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>(1)</label><nlm-citation citation-type="">
<collab>Ministerio de Ambiente</collab>
<source><![CDATA[Ministerio de Ambiente , Energía y Telecomunicaciones Instituto Meteorológico Nacional de Costa Rica, Escenarios de cambio climático reginalizados para Costa Rica, San José, 2012, p. 1060.]]></source>
<year>2012</year>
</nlm-citation>
</ref>
<ref id="B2">
<label>(2)</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gomes]]></surname>
<given-names><![CDATA[H. P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Sistemas de Irrigação]]></article-title>
<source><![CDATA[Eficiência Energética, João Pessoa, Paraíba, 2013, p. 281.]]></source>
<year>2013</year>
</nlm-citation>
</ref>
<ref id="B3">
<label>(3)</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Angelocci]]></surname>
<given-names><![CDATA[L. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Sentelhas]]></surname>
<given-names><![CDATA[P. C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Meteorologia Agrícola: Evapotranspiração Definições e Conceitos (Aula # 8)]]></article-title>
<source><![CDATA[Piracicaba]]></source>
<year>2012</year>
</nlm-citation>
</ref>
<ref id="B4">
<label>(4)</label><nlm-citation citation-type="">
<collab>Universidade de São Paulo</collab>
<source><![CDATA[Departamento de Engenharia e Biosistemas, Micrometeorologia de Sistemas Agrícolas]]></source>
<year></year>
</nlm-citation>
</ref>
<ref id="B5">
<label>(5)</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Profeta]]></surname>
<given-names><![CDATA[A. . L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estimativa da evapotranspiração real em área de relevo acidentado utilizando o SEBAL]]></article-title>
<source><![CDATA[Dissertação Programa de Pós-Graduação, Universidade Federal de Minas Gerais)]]></source>
<year>2017</year>
</nlm-citation>
</ref>
<ref id="B6">
<label>(6)</label><nlm-citation citation-type="journal">
<collab>Universidad Autónoma de San Luis de Potosi. Centro de investigación y estudios de posgrad y área agrogeodésica.</collab>
<article-title xml:lang=""><![CDATA[Apuntes de la materia de riego y drenaje]]></article-title>
<source><![CDATA[Universidad Autónoma de San Luis de Potosi]]></source>
<year>2003</year>
</nlm-citation>
</ref>
<ref id="B7">
<label>(7)</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Santos Pereira]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<source><![CDATA[s.f]]></source>
<year></year>
</nlm-citation>
</ref>
<ref id="B8">
<label>(8)</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lopes]]></surname>
<given-names><![CDATA[O. D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Determinação do coeficiente de cultura (Kc) e eficiência do uso de água do alecrim-pimenta irrigado]]></article-title>
<source><![CDATA[Revista Brasileira de Engenharia Agrícola e Ambiental]]></source>
<year>2011</year>
</nlm-citation>
</ref>
<ref id="B9">
<label>(9)</label><nlm-citation citation-type="">
<collab>Instituto Nacional de Meteorologia (INMET)</collab>
<source><![CDATA[Instituto Nacional de Meteorologia]]></source>
<year>2009</year>
</nlm-citation>
</ref>
<ref id="B10">
<label>(10)</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Testezlaf]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Universidade Estadual de Campinas: Faculdade de Engenharia de Alimentos e Agrícola]]></source>
<year></year>
</nlm-citation>
</ref>
<ref id="B11">
<label>(11)</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Montenegro-Hernández]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[E. d. J. Montenegro-Hernández, Cartago, Cartago, 2018, p. 507.]]></source>
<year>2018</year>
</nlm-citation>
</ref>
<ref id="B12">
<label>(12)</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Thimijan]]></surname>
<given-names><![CDATA[R. W.]]></given-names>
</name>
<name>
<surname><![CDATA[Heins]]></surname>
<given-names><![CDATA[R. D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Photometric, Radiometric, and Quantum Light Units of Measure: A Review of Procedures for Interconversion]]></article-title>
<source><![CDATA[American Society for Horticultural Science: HortScienc]]></source>
<year>1983</year>
</nlm-citation>
</ref>
<ref id="B13">
<label>(13)</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rio]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[VIII Jornada Acadêmica da Embrapa Soja]]></article-title>
<source><![CDATA[Resumos expandidos]]></source>
<year>2013</year>
</nlm-citation>
</ref>
<ref id="B14">
<label>(14)</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dias de Freitas]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Departamento de Ciências Atmosféricas do IAG-USP]]></source>
<year>2005</year>
</nlm-citation>
</ref>
<ref id="B15">
<label>(15)</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[da Silva]]></surname>
<given-names><![CDATA[M. G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[ESTIMATIVA DA EVAPOTRANSPIRAÇÃO DE REFERÊNCIA PELA EQUAÇÃO DE HARGREAVES-SAMANI NO ESTADO DO CEARÁ, BRASIL]]></article-title>
<source><![CDATA[Brazilian Journal of Biosystems Engineering]]></source>
<year>2015</year>
</nlm-citation>
</ref>
<ref id="B16">
<label>(16)</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Arcanjo Reis]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Moreira de Souza]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Universidade Federal da Grande Dourados, Dourados, Mato Grosso do Sul]]></source>
<year>2019</year>
</nlm-citation>
</ref>
<ref id="B17">
<label>(17)</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chavarría Vidal]]></surname>
<given-names><![CDATA[A. E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Apuntes de clases de Relación Suelo Agua Planta, Cartago, Cartago]]></source>
<year>2012</year>
</nlm-citation>
</ref>
<ref id="B18">
<label>(18)</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[de Oliveira Santos]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Métodos de Estimativa da Evapotranspiração de Referência (ETO) para a Região de Mossoró-RN]]></article-title>
<source><![CDATA[Revista Verde (Mossoró &#8211; RN &#8211; Brasil)]]></source>
<year>2010</year>
</nlm-citation>
</ref>
<ref id="B19">
<label>(19)</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pereira]]></surname>
<given-names><![CDATA[A. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Angelocci]]></surname>
<given-names><![CDATA[L. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Sentelhas]]></surname>
<given-names><![CDATA[P. C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Meteorología Agrícola]]></article-title>
<source><![CDATA[Piracicaba]]></source>
<year>2000</year>
</nlm-citation>
</ref>
<ref id="B20">
<label>(20)</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[de Castro]]></surname>
<given-names><![CDATA[P. A. L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Models for Estimating Reference Evapotranspiration in Different Periods in Rio Verde, Goiás, Brazil]]></article-title>
<source><![CDATA[Journal of Agricultural Science]]></source>
<year>2019</year>
</nlm-citation>
</ref>
<ref id="B21">
<label>(21)</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[da Costa Santos]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Assessment of empirical methods for estimation of reference evapotranspiration in the Brazilian Savannah]]></article-title>
<source><![CDATA[Australian Journal of Crop Science]]></source>
<year>2019</year>
</nlm-citation>
</ref>
<ref id="B22">
<label>(22)</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Garbi]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<source><![CDATA[La Plata]]></source>
<year>2020</year>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
