<?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>1027-152X</journal-id>
<journal-title><![CDATA[Revista Chapingo. Serie horticultura]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Chapingo Ser.Hortic]]></abbrev-journal-title>
<issn>1027-152X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Chapingo]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1027-152X2017000300163</article-id>
<article-id pub-id-type="doi">10.5154/r.rchsh.2017.01.003</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Population densities and blunting levels for contrasting varieties of greenhouse tomatoes]]></article-title>
<article-title xml:lang="es"><![CDATA[Densidades de población y niveles de despunte para variedades contrastantes de jitomate en invernadero]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-del Castillo]]></surname>
<given-names><![CDATA[Felipe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moreno-Pérez]]></surname>
<given-names><![CDATA[Esaú del Carmen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vázquez-Rodríguez]]></surname>
<given-names><![CDATA[José Cutberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Núñez]]></surname>
<given-names><![CDATA[Miguel Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Chapingo  ]]></institution>
<addr-line><![CDATA[Chapingo México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<volume>23</volume>
<numero>3</numero>
<fpage>163</fpage>
<lpage>174</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1027-152X2017000300163&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1027-152X2017000300163&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1027-152X2017000300163&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Due to population growth, scarce arable area and environmental problems, the need to increase agricultural production leads to the use of intensive production systems such as hydroponics and greenhouses. The aim of this study was to evaluate the behavior of agronomic management in varieties of tomato (Solanum lycopersicum L.), in particular the yield and its components in plants blunted or cut back to two and three clusters, established at different population densities. The varieties studied were: 'Imperial' (beef type), 'Moctezuma' (saladette type), 'Pick ripe' (beef type) and 'Serengueti' (saladette type). The first two show indeterminate growth and the other two determinate. Three population densities were established per blunting level (20, 16 and 12 plants&#8729;m-2 for plants blunted above the second inflorescence, and 13, 10 and 7 plants&#8729;m-2 for those blunted above the third inflorescence). A randomized complete block design was used with four replicates and a split-plot treatment arrangement with nested factors (densities within blunting levels). The beef varieties yielded 37 % more than the saladette ones. Among varieties with the same type of fruit, 'Imperial' yielded more than 'Pick ripe' and 'Moctezuna' surpassed 'Serengueti'; that is, the indeterminate varieties yielded more than the determinate ones. The highest yield of 'Imperial&#8217; (38.16 kg&#8729;m-2 of cultivated area, equivalent to 25 kg&#8729;m-2 of greenhouse area) and &#8216;Moctezuma&#8217; (28.16 kg&#8729;m-2 of cultivated area, equivalent to 18.7 kg&#8729;m-2 of greenhouse area) was achieved by establishing 13 plants&#8729;m-2 and blunting above the third inflorescence.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Debido al crecimiento poblacional, escasa superficie cultivable y problemas ambientales, la necesidad de incrementar la producción agrícola conlleva a utilizar sistemas de producción intensivos como hidroponía e invernaderos. El objetivo del presente trabajo fue evaluar el comportamiento del manejo agronómico en variedades de jitomate (Solanum lycopersicum L.), en particular el rendimiento y sus componentes en plantas despuntadas a dos y tres racimos, establecidas a distintas densidades de población. Las variedades estudiadas fueron: &#8216;Imperial&#8217; (tipo bola), &#8216;Moctezuma&#8217; (tipo saladette), &#8216;Pick ripe&#8217; (tipo bola) y &#8216;Serengueti&#8217; (tipo saladette). Las primeras dos presentan crecimiento indeterminado y las otras dos determinado. Se establecieron tres densidades de población por nivel de despunte (20, 16 y 12 plantas&#8729;m-2 para plantas podadas a la segunda inflorescencia, y 13, 10 y 7 plantas&#8729;m-2 para aquellas despuntadas a la tercera inflorescencia). Se usó un diseño de bloques completos al azar con cuatro repeticiones y arreglo de tratamientos en parcelas subdivididas con factores anidados (densidades dentro de niveles de podas). Las variedades tipo bola rindieron 37 % más que las saladette. Entre variedades con el mismo tipo de fruto, &#8216;Imperial&#8217; rindió más que &#8216;Pick ripe&#8217; y &#8216;Moctezuna&#8217; superó a &#8216;Serengueti&#8217;; es decir, las indeterminadas rindieron más que las determinadas. El rendimiento mayor de &#8216;Imperial&#8217; (38.16 kg&#8729;m-2 útil, equivalente a 25 kg&#8729;m-2 de invernadero) y &#8216;Moctezuma&#8217; (28.16 kg&#8729;m-2 útil, equivalente a 18.7 kg&#8729;m-2 de invernadero) se logró al establecer 13 plantas&#8729;m-2 y despuntes a la tercera inflorescencia.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Solanum lycopersicum L.]]></kwd>
<kwd lng="en"><![CDATA[hydroponics]]></kwd>
<kwd lng="en"><![CDATA[greenhouse]]></kwd>
<kwd lng="en"><![CDATA[pruning]]></kwd>
<kwd lng="en"><![CDATA[population density]]></kwd>
<kwd lng="es"><![CDATA[Solanum lycopersicum L.]]></kwd>
<kwd lng="es"><![CDATA[hidroponía]]></kwd>
<kwd lng="es"><![CDATA[invernadero]]></kwd>
<kwd lng="es"><![CDATA[poda]]></kwd>
<kwd lng="es"><![CDATA[densidad de población]]></kwd>
</kwd-group>
</article-meta>
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<publisher-loc><![CDATA[Sunderland, Massachusetts, USA ]]></publisher-loc>
<publisher-name><![CDATA[Sinauer Associates Inc. Publishers]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
