<?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>2007-0934</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias agrícolas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Cienc. Agríc]]></abbrev-journal-title>
<issn>2007-0934</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-09342017000501127</article-id>
<article-id pub-id-type="doi">10.29312/remexca.v8i5.113</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Características de la cubierta de un túnel efecto en radiación, clorofila y rendimiento de calabacita]]></article-title>
<article-title xml:lang="en"><![CDATA[Characteristics of a tunnel cover effect on radiation, chlorophyll and zucchini yield]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ángel-Hernández]]></surname>
<given-names><![CDATA[Martha Del]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zermeño-Gonzalez]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Melendres-Alvarez]]></surname>
<given-names><![CDATA[Aaron Isain]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Campos-Magaña]]></surname>
<given-names><![CDATA[Santos Gabriel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cadena-Zapata]]></surname>
<given-names><![CDATA[Martín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Del Bosque-Villarreal]]></surname>
<given-names><![CDATA[Gustavo Arturo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Departamento de Riego y Drenaje Departamento de Riego y Drenaje ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Agraria Antonio Narro Departamento de Maquinaria Agrícola ]]></institution>
<addr-line><![CDATA[Saltillo Coahuila]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Grupo Alfa Tecnológico  ]]></institution>
<addr-line><![CDATA[Monterrey Nuevo León]]></addr-line>
</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>8</volume>
<numero>5</numero>
<fpage>1127</fpage>
<lpage>1142</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342017000501127&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342017000501127&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342017000501127&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Debido que la agricultura bajo cubiertas plásticas es una alternativa para mejorar la producción de cultivos hortícolas, el objetivo de este estudio fue evaluar el efecto de cuatro tipos de cubiertas de túneles de diferentes materiales y colores en la transmitancia de la radiación y su relación con contenido de clorofila, crecimiento y rendimiento de un cultivo de calabacita (Cucurbita pepo) cv. Zucchini. El estudio se realizó durante el ciclo de producción otoño-invierno 2015 a 2016, en Sabinas Hidalgo, Nuevo León. Los materiales utilizados fueron tres túneles con láminas de policarbonato de color rojo, azul y claro respectivamente, y otro con una cubierta de polietileno de alta densidad. Dentro de cada túnel se registró la radiación solar y la fotosintéticamente activa. También se obtuvo el contenido de clorofila de las hojas de las plantas. Los resultados mostraron que, para la banda de la radiación PAR, el policarbonato de color rojo tuvo la menor transmitancia (23.51%), seguido por el de color azul (57.46%), el polietileno de alta densidad (60.51%) y el de mayor transmitancia fue el policarbonato de color claro (82.57%). Las plantas que crecieron bajo el túnel con el policarbonato de color claro tuvieron mayor contenido de clorofila, mayor desarrollo foliar y rendimiento de fruto. Por el contrario, las plantas en el túnel de policarbonato rojo que recibieron la menor cantidad de radiación PAR, tuvieron el menor contenido de clorofila, menor desarrollo foliar y sin rendimiento de frutos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Since the agricultura under plastic covers is an alternative to improve yield of horticultural crops, the aim of this research was to evaluate the effect of four types of tunnel covers of different materials and colors in the transmitance of radiation and its relationship with chlorophyll content, growth and crop yield of zucchini (Cucurbita pepo) cv. Zucchini. The study was conducted during the production cycle autumn-winter 2015-2016 in Sabinas Hidalgo, Nuevo León. The materials used were three tunnels with polycarbonate films of red, blue and clear color respectively, and another with a cover of high density polyethylene. Within each tunnel, solar radiation and photosynthetically active were registered. The chlorophyll contents from the leaves of the plants was also obtained. The results showed that, for the PAR radiation band, red polycarbonate had the lowest transmittance (23.51%), followed by the blue (57.46%), the high density polyethylene (60.51%) and the one with greater transmittance was the light-colored polycarbonate (82.57%). Plants grown under the tunnel with light colored polycarbonate had higher chlorophyll content, better leaf development and increased fruit yield. In contrast, the plants in the red polycarbonate tunnel that received the least amount of PAR radiation had the lowest chlorophyll content, lower leaf development and no fruit yield.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Cucurbita pepo]]></kwd>
<kwd lng="es"><![CDATA[cubierta]]></kwd>
<kwd lng="es"><![CDATA[policarbonato]]></kwd>
<kwd lng="es"><![CDATA[polietileno]]></kwd>
<kwd lng="es"><![CDATA[túnel]]></kwd>
<kwd lng="es"><![CDATA[transmitancia]]></kwd>
<kwd lng="en"><![CDATA[Cucurbita pepo]]></kwd>
<kwd lng="en"><![CDATA[cover]]></kwd>
<kwd lng="en"><![CDATA[polycarb]]></kwd>
<kwd lng="en"><![CDATA[polyethylene]]></kwd>
<kwd lng="en"><![CDATA[tunnel]]></kwd>
<kwd lng="en"><![CDATA[transmittance]]></kwd>
</kwd-group>
</article-meta>
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