<?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>1659-1321</journal-id>
<journal-title><![CDATA[Agronomía Mesoamericana]]></journal-title>
<abbrev-journal-title><![CDATA[Agron. Mesoam]]></abbrev-journal-title>
<issn>1659-1321</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1659-13212017000200509</article-id>
<article-id pub-id-type="doi">10.15517/ma.v28i2.24354</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Necesidades hídricas de estevia calculadas con el coeficiente del cultivo]]></article-title>
<article-title xml:lang="en"><![CDATA[Stevia water needs calculated from the crop coefficient]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Daza-Torres]]></surname>
<given-names><![CDATA[Martha Constanza]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Meneses-Carvajal]]></surname>
<given-names><![CDATA[Hugo Stiven]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes-Trujillo]]></surname>
<given-names><![CDATA[Aldemar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Urrutia-Cobo]]></surname>
<given-names><![CDATA[Norberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad del Valle  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>CO</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Eduardo Taguil Agroinsumos Sociedad en comandita Simple  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>CO</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad del Valle  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>CO</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad del Valle  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>CO</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2017</year>
</pub-date>
<volume>28</volume>
<numero>2</numero>
<fpage>509</fpage>
<lpage>521</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S1659-13212017000200509&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S1659-13212017000200509&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S1659-13212017000200509&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El presente trabajo tuvo como objetivo determinar las necesidades hídricas a partir de la curva de coeficiente de cultivo (Kc) para estevia ( Stevia rebaudiana Bertoni) en Candelaria, Valle del Cauca, Colombia. El experimento se desarrolló durante el primer semestre de 2015. En una parcela cultivada con estevia se establecieron tres lisímetros de drenaje dispuestos al azar y una estación metereológica portátil para la determinación de las variables climatológicas necesarias para el cálculo de la evapotranspiración de referencia (ETo), con el empleo de la ecuación de Penman Monteith. Se determinó la humedad de capacidad de campo del suelo y se realizó un seguimiento periódico tanto de la humedad del suelo como de la lámina de drenaje. La lámina de riego fue aplicada con base en un coeficiente de agotamiento del 10% para llevarlo nuevamente a capacidad de campo. Se realizaron los análisis estadísticos de normalidad, homogeneidad de varianzas y regresiones, y se calculó el Kc para cada etapa fisiológica, a partir del cociente entre la evapotranspiración del cultivo (ETc) y ETo. Con 95% de confianza los Kc para estevia fueron: etapa de crecimiento (54 días después del trasplante ddt) 0,86 ± 0,12, etapa de madurez (55 &#8211; 72 ddt) 1,24 ± 0,10 y etapa de senescencia (72 - 96 ddt) 0,85 ± 0,14. El consumo de agua de Stevia rebaudiana B., fue de 4753 m3/ha, durante su ciclo de cultivo de 96 días después del trasplante.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This study aimed to determine the crop coefficient (Kc) curve for stevia ( Stevia rebaudiana Bertoni) in Candelaria, Valle del Cauca, Colombia. The experiment was conducted during the first half of 2015. In a plot planted with stevia, were located three drainage lysimeters arranged randomly and a portable weather station to determine climatic variables necessary for calculating an evapotranspiration reference (ETo), using the Penman Monteith equation. Soil field capacity moisture was determined and regular monitoring of both, soil moisture and drainage water depth were performed. Irrigation was applied using an exhaustion coefficient of 10% to bring it back to field capacity moisture. Statistical analyzes were performed and Kc was calculated from the ratio of crop evapotranspiration (ETc) to ETo, for each plant in phenological phase. With confidence of 95% Kc for stevia were: growth stage (54 days after transplantation, ddt) 0.86 ± 0.12, mature stage (55-72 ddt) 1.24 ± 0.10 and senescence stage (72-96 ddt) 0.85 ± 0.14. Water consumption of Stevia rebaudiana B., was 4753 m3/ha during its growing cycle of 96 days after transplantation.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[balance hídrico]]></kwd>
<kwd lng="es"><![CDATA[agua de drenaje]]></kwd>
<kwd lng="es"><![CDATA[evapotranspiración]]></kwd>
<kwd lng="es"><![CDATA[Stevia rebaudiana Bertoni]]></kwd>
<kwd lng="en"><![CDATA[hydric balance]]></kwd>
<kwd lng="en"><![CDATA[drainage water]]></kwd>
<kwd lng="en"><![CDATA[evapotranspiration]]></kwd>
<kwd lng="en"><![CDATA[Stevia rebaudiana Bertoni]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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