<?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>0188-6266</journal-id>
<journal-title><![CDATA[Acta universitaria]]></journal-title>
<abbrev-journal-title><![CDATA[Acta univ]]></abbrev-journal-title>
<issn>0188-6266</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Guanajuato, Dirección de Investigación y Posgrado]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-62662019000100115</article-id>
<article-id pub-id-type="doi">10.15174/au.2019.1832</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto de la sombra sobre la emergencia de plántulas de especies maderables nativas de la Península de Yucatán]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of shade on the emergence of seedlings of native timber species from the Yucatan Peninsula]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Haas-Tzuc]]></surname>
<given-names><![CDATA[Jaime Esteban]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Dzib-Castillo]]></surname>
<given-names><![CDATA[Benito]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Poot-Pool]]></surname>
<given-names><![CDATA[Wilbert Santiago]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chiquini-Medina]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Tecnológico de Chiná  ]]></institution>
<addr-line><![CDATA[Chiná Campeche]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<volume>29</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-62662019000100115&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-62662019000100115&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-62662019000100115&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La influencia que tiene la radiación solar sobre la germinación y emergencia de plántulas no ha sido descrita para muchas de las especies tropicales de importancia maderable. La presente investigación se enfoca en la emergencia de plántulas de taxa maderables nativas de la Península de Yucatán bajo diferentes grados de sombra (0%, 35%, 60% y 90%). Para ello, se realizó la evaluación de las especies de Caesalpinia mollis (chakté) , (Piscidia piscipula) (jabín) y jujuché (Albizia tomentosa). C. molli y A. tomentosa presentaron diferencias entre tratamientos (p &lt; 0.0001 y p &lt; 0.0,1 respectivamente), ambas tuvieron mayor emergencia de plántulas con la luminosidad más elevada (0% de sombra). El tiempo de inicio de emergencia de las plántulas fue de cuatro a cinco días y la emergencia del 100% se logró en menos días con el 90% de sombra para las tres especies. Los resultados expresan que el porcentaje de sombra influye en la emergencia total de las plántulas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The influence of solar radiation on the germination and emergence of seedlings has not been described for many of the timber species present in the tropics. The present research focuses on the emergence of native timber taxa seedlings of the Yucatan Peninsula under different degrees of shade (0%, 35%, 60% and 90%). For this, the evaluation of chakté (Caesalpinia mollis), jabín (Piscidia piscipula), and jujuché (Albizia tomentosa) was carried out. C. molli and A. tomentosa presented differences between treatments (p &lt; 0.0001 and p &lt; 0.01, respectively), both of which had the highest emergence of seedlings with the highest luminosity (0% of shade). The emergence time of the seedlings was four to five days, and the emergence of 100% was achieved in less days with 90% of shade for the three species.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Emergencia]]></kwd>
<kwd lng="es"><![CDATA[sombra]]></kwd>
<kwd lng="es"><![CDATA[nativas]]></kwd>
<kwd lng="es"><![CDATA[plántulas]]></kwd>
<kwd lng="en"><![CDATA[Emergency]]></kwd>
<kwd lng="en"><![CDATA[shade, native]]></kwd>
<kwd lng="en"><![CDATA[seedlings]]></kwd>
</kwd-group>
</article-meta>
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