<?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>S1659-13212018000200305</article-id>
<article-id pub-id-type="doi">10.15517/ma.v29i2.29771</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Áreas potenciales para el cultivo de girasol en condiciones de temporal en Guanajuato, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Potential areas for sunflower cultivation under rainfed conditions in Guanajuato, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Rocha]]></surname>
<given-names><![CDATA[Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mireles-Arriga]]></surname>
<given-names><![CDATA[Ana Isabel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Ruiz]]></surname>
<given-names><![CDATA[Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ruiz-Nieto]]></surname>
<given-names><![CDATA[Jorge Eric]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rucoba-García]]></surname>
<given-names><![CDATA[Armando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Guanajuato  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Guanajuato  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Guanajuato  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Guanajuato  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad de Guanajuato  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2018</year>
</pub-date>
<volume>29</volume>
<numero>2</numero>
<fpage>305</fpage>
<lpage>314</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S1659-13212018000200305&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S1659-13212018000200305&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S1659-13212018000200305&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  En los últimos cinco años en México se registró un incremento de 189,50 a 13 219,84 hectáreas, en la superficie de cultivo de girasol en temporal, particularmente en el estado de Guanajuato se sembró aproximadamente 450 hectáreas en 2016. Esta forma de cultivo requiere de planeación que contemple variables bioclimáticas para el óptimo desarrollo y rendimiento. El objetivo del presente trabajo fue determinar las áreas con potencial bioclimático para el establecimiento del cultivo de girasol en temporal en el estado de Guanajuato. Durante el ciclo otoño-invierno del 2016 se monitorearon y se estratificaron 45 parcelas de girasol, distribuidas en once municipios, en las que se registró el rendimiento asociado a temperatura máxima y mínima, humedad relativa, radiación solar, precipitación y evapotranspiración. Los datos de parcelas con un rendimiento mayor a 1,89 t/ha se utilizaron para generar polígonos con una saturación de 56 puntos de abundancia, para calcular la distribución potencial mediante el programa Maxent, con 23 variables bioclimáticas como predictores. Las variables con mayor contribución porcentual a la distribución potencial fueron: temperatura promedio del cuatrimestre más seco, altitud, régimen de humedad y perfil edáfico. Las áreas potenciales para el establecimiento del cultivo suman una superficie total de 317 028 hectáreas, donde el clima predominante es semicálido subhúmedo, temperatura media anual de 20 °C, precipitación media anual de 600 a 800 mm y una altitud de 500 a 1500 msnm.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  In Mexico, in the last five years, there was a 189.50 to 13 219.84 hectares increase in sunflower crop surface under rainfed conditions. Particularly, in 2016, in the state of Guanajuato, approximately 450 hectares were planted. Cultivation under rainfed conditions requires planning including bioclimatic variables to reach the optimal crop yield and development. This work aims to identify bioclimatic potential areas for sunflower cultivation under rainfed conditions in Guanajuato. In autumn-winter 2016, 45 sunflower fields (distributed in eleven towns) were monitored and stratified. Crop yield associated to maximum and minimum temperature, relative humidity, solar radiation, precipitation and evapotranspiration were recorded. The data from fields with higher yield than 1.89 t/ha were used to generate polygons with a saturation of 56 abundance points, to calculate the potential distribution using the Maxent software, with 23 bioclimatic variables as predictors. The variables with the highest contribution percentage to the potential distribution were: average temperature of the driest quarter, altitude, moisture regime, and edaphic profile. The potential areas for sunflower cultivation had a surface of 317 028 hectares where the predominant climate is sub-humid warm, the annual mean temperature is 20 °C, the annual mean rainfall is 600 to 800 mm, and the altitude ranges from 500 to 1500 masl.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Helianthus annuus]]></kwd>
<kwd lng="es"><![CDATA[factores climáticos]]></kwd>
<kwd lng="es"><![CDATA[zonas climáticas]]></kwd>
<kwd lng="es"><![CDATA[rendimiento de cultivos]]></kwd>
<kwd lng="en"><![CDATA[Helianthus annuus]]></kwd>
<kwd lng="en"><![CDATA[climatic factors]]></kwd>
<kwd lng="en"><![CDATA[climate zones]]></kwd>
<kwd lng="en"><![CDATA[crop yield]]></kwd>
</kwd-group>
</article-meta>
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