<?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>2007-4018</journal-id>
<journal-title><![CDATA[Revista Chapingo serie ciencias forestales y del ambiente]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Chapingo ser. cienc. for. ambient]]></abbrev-journal-title>
<issn>2007-4018</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Chapingo, Coordinación de Revistas Institucionales]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-40182022000100155</article-id>
<article-id pub-id-type="doi">10.5154/r.rchscfa.2021.07.046</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Yield and vivipary of pecan nut (Carya illinoinensis [Wangenh.] K. Koch) in relation to soil moisture]]></article-title>
<article-title xml:lang="es"><![CDATA[Producción y viviparidad de nogal pecanero (Carya illinoinensis [Wangenh.] K. Koch) en relación con la humedad del suelo]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-González]]></surname>
<given-names><![CDATA[Mayela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arreola-Ávila]]></surname>
<given-names><![CDATA[Jesús G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Trejo-Calzada]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cueto-Wong]]></surname>
<given-names><![CDATA[José A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zegbe-Domínguez]]></surname>
<given-names><![CDATA[Jorge A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes-Juárez]]></surname>
<given-names><![CDATA[Isidro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Yáñez-Chávez]]></surname>
<given-names><![CDATA[Luis G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Borja-de la Rosa]]></surname>
<given-names><![CDATA[Amparo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Chapingo Unidad Regional Universitaria de Zonas Áridas ]]></institution>
<addr-line><![CDATA[Bermejillo Durango]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias  ]]></institution>
<addr-line><![CDATA[Matamoros Coahuila]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales Agrícolas Campo Experimental Zacatecas ]]></institution>
<addr-line><![CDATA[Calera de Víctor Rosales Zacatecas]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma Chapingo División de Ciencias Forestales ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2022</year>
</pub-date>
<volume>28</volume>
<numero>1</numero>
<fpage>155</fpage>
<lpage>167</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-40182022000100155&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-40182022000100155&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-40182022000100155&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction:  Viviparity in pecan nut (Carya illinoinensis [Wangenh.] K. Koch) has increased considerably. This genetic-environmental phenomenon can be controlled with soil moisture management and other quality variables.  Objective:  To determine the effect of soil moisture content on yield, nut size, kernel percentage and germinated nut on the tree.  Materials and methods: Forty-year-old pecan nut trees were irrigated by 40 emitters with an output of 3.2 L&#8729;h-1. From the phenological stage of shell hardening, irrigation time was 4, 6 and 8 h, corresponding to moisture levels of 0.257, 0.327 and 0.380 m3 of water per m3 of soil, at depths of 40 to 80 cm. Yield per tree, germinated nut percentage, fruit size and kernel percentage were evaluated during the production cycles of 2016 and 2017 production cycles.  Results and discussion:  During the two production cycles, when soil moisture level increased from 0.257 to 0.380 m3&#8729;m-3, nut yield per tree, fruit length and diameter, and kernel percentage increased on average 23.8 %, 25.3 and 10 %, and 1.8 %, respectively; however, vivipary increased 11.2 %, which was reflected in the decrease of commercial pecan nut percentage. Treatments 0.327 and 0.380 m3&#8729;m-3 had a similar effect (P &gt; 0.05) on these variables.  Conclusions:  The lower moisture level (0.257 m3&#8729;m-3), starting at the kernel filling stage, decreased vivipary and increased commercial kernel percentage.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción:  La viviparidad en nogal pecanero (Carya illinoinensis [Wangenh.] K. Koch) ha incrementado considerablemente. Este fenómeno genético-ambiental puede ser controlado con el manejo de humedad del suelo y otras variables de calidad.  Objetivo:  Determinar el efecto del contenido de humedad del suelo sobre el rendimiento, tamaño de nuez, porcentaje de almendra y nuez germinada en el árbol.  Materiales y métodos:  Árboles de nogal de 40 años fueron regados por 40 emisores con gasto de 3.2 L&#8729;h-1. A partir de la etapa fenológica de endurecimiento de cáscara, el tiempo de riego fue de 4, 6 y 8 h, correspondientes a niveles de humedad de 0.257, 0.327 y 0.380 m3 de agua por m3 de suelo, a profundidad de 40 a 80 cm. El rendimiento por árbol, porcentaje de nuez germinada, tamaño de fruto y porcentaje de almendra se evaluaron durante los ciclos productivos 2016 y 2017.  Resultados y discusión:  Durante los dos ciclos de producción, cuando el nivel de humedad en el suelo aumentó de 0.257 a 0.380 m3&#8729;m-3, la producción de nuez por árbol, la longitud y diámetro del fruto, y el porcentaje de almendra incrementaron en promedio 23.8 %, 25.3 y 10 %, y 1.8 %, respectivamente; sin embargo, la viviparidad incrementó 11.2 %, lo cual se vio reflejado en la disminución del porcentaje de nuez comercial. Los tratamientos 0.327 y 0.380 m3&#8729;m-3 tuvieron un efecto similar (P &gt; 0.05) en dichas variables.  Conclusiones:  El menor nivel de humedad (0.257 m3&#8729;m-3), a partir del llenado de almendra, disminuyó la viviparidad y aumentó el porcentaje de nuez comercial.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[nut]]></kwd>
<kwd lng="en"><![CDATA[Western variety]]></kwd>
<kwd lng="en"><![CDATA[premature germination, fruit size, kernel percentage]]></kwd>
<kwd lng="es"><![CDATA[nuez]]></kwd>
<kwd lng="es"><![CDATA[variedad Western]]></kwd>
<kwd lng="es"><![CDATA[germinación prematura, tamaño de fruto, porcentaje de almendra]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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