<?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>0187-7380</journal-id>
<journal-title><![CDATA[Revista fitotecnia mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. fitotec. mex]]></abbrev-journal-title>
<issn>0187-7380</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Fitogenética A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-73802019000400419</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[LA SOLUCIÓN NUTRITIVA MODIFICA EL CRECIMIENTO DE DOS ESPECIES DE ORQUÍDEAS]]></article-title>
<article-title xml:lang="en"><![CDATA[THE NUTRIENT SOLUTION MODIFIES THE GROWTH OF TWO ORCHID SPECIES]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jiménez-Peña]]></surname>
<given-names><![CDATA[Nadia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sandoval-Villa]]></surname>
<given-names><![CDATA[Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Volke-Haller]]></surname>
<given-names><![CDATA[Víctor H.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pedraza-Santos]]></surname>
<given-names><![CDATA[Martha]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Colinas-León]]></surname>
<given-names><![CDATA[María Teresa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Michoacana de San Nicolás Hidalgo Facultad de Agrobiología ]]></institution>
<addr-line><![CDATA[Uruapan Michoacán]]></addr-line>
<country>México</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad Autónoma Chapingo Departamento de Fitotecnia ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>42</volume>
<numero>4</numero>
<fpage>419</fpage>
<lpage>427</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-73802019000400419&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-73802019000400419&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-73802019000400419&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Las orquídeas (Orchidaceae) se desarrollan en una gran variedad de condiciones ambientales, por lo que tienen requerimientos específicos de nutrición. En la nutrición de orquídeas existe desconocimiento de los efectos de los fertilizantes y de su uso a lo largo del ciclo de estas plantas. El objetivo de esta investigación fue estudiar el efecto de tres soluciones nutritivas sobre el desarrollo y crecimiento de Laelia autumnalis y Paphiopedilum insigne. El experimento se realizó en un periodo de 27 meses en condiciones de invernadero. Las variables evaluadas fueron número de hojas, área foliar, peso fresco y seco total de la planta, de raíz y de hoja, y lecturas SPAD en hojas maduras; además, en L. autumnalis se evaluó el número de pseudobulbos, grosor y largo de pseudobulbos, así como el peso fresco y seco de éstos. Se encontró que en L. autumnalis la solución de Steiner incrementó el número de hojas (100 %), pseudobulbos (133 %), área foliar (80 %), peso fresco total (78 %) y peso seco total (125 %), en comparación con las plantas tratadas sólo con agua (testigo). En P. insigne la solución Hoagland-Arnon mejoró el crecimiento vegetativo, incrementó el número de hojas (65 %), área foliar (83 %), lecturas SPAD (79 %), peso fresco total (33 %) y peso seco total (27 %), en comparación con las plantas testigo. Los resultados demuestran que las soluciones nutritivas influyen positivamente en el crecimiento de las dos especies de orquídeas y que cada especie tiene requerimientos nutrimentales particulares; asimismo, los resultados podrían ser de utilidad en programas de conservación y aprovechamiento de estas especies.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Orchids (Orchidaceae) develop in a wide range of environmental conditions, so they have specific nutrition requirements. In the nutrition of orchids there is lack of knowledge on the effects of fertilizers and their use throughout the cycle of these plants. The objective of this research was to study the effect of three nutrient solutions on the development and growth of Laelia autumnalis and Paphiopedilum insigne. The experiment was conducted over a period of 27 months under greenhouse conditions. The variables evaluated were number of leaves, leaf area, fresh and dry total weight of the plant, root and leaf, and SPAD readings in mature leaves; in addition, in L. autumnalis the number of pseudobulbs, thickness and length, as well as the fresh and dry weight of these pseudobulbs were evaluated. It was found that in L. autumnalis the Steiner solution increased the number of leaves (100 %), pseudobulbs (133 %), leaf area (80 %), total fresh weight (78 %) and total dry weight (125 %), compared to plants treated only with water (control). In P. insigne the Hoagland-Arnon solution improved the vegetative growth, increased the number of leaves (65 %), leaf area (83 %), SPAD readings (79 %), total fresh weight (33 %) and total dry weight (27 %), compared to the control plants. Results show that nutrient solutions positively influence growth of the two orchid species, and that each species has particular nutritional requirements; likewise, these results could be useful in conservation and exploitation programs of these species.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Laelia autumnalis]]></kwd>
<kwd lng="es"><![CDATA[Paphiopedilum insigne]]></kwd>
<kwd lng="es"><![CDATA[HoaglandArnon]]></kwd>
<kwd lng="es"><![CDATA[nutrición mineral]]></kwd>
<kwd lng="es"><![CDATA[Steiner]]></kwd>
<kwd lng="es"><![CDATA[Wynd]]></kwd>
<kwd lng="en"><![CDATA[Laelia autumnalis]]></kwd>
<kwd lng="en"><![CDATA[Paphiopedilum insigne]]></kwd>
<kwd lng="en"><![CDATA[HoaglandArnon]]></kwd>
<kwd lng="en"><![CDATA[mineral nutrition]]></kwd>
<kwd lng="en"><![CDATA[Steiner]]></kwd>
<kwd lng="en"><![CDATA[Wynd]]></kwd>
</kwd-group>
</article-meta>
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