<?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>S0187-73802021000100051</article-id>
<article-id pub-id-type="doi">10.35196/rfm.2021.1.51</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Comportamiento de un fertilizante de liberación lenta a base de organobentonita-fosfato en plantas de lechuga]]></article-title>
<article-title xml:lang="en"><![CDATA[Performance of a slow-release fertilizer based on organobentonite-phosphate on lettuce plants]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Romero-Mendez]]></surname>
<given-names><![CDATA[Mauricio J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas-Velázquez]]></surname>
<given-names><![CDATA[Ángel N.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lara-Mireles]]></surname>
<given-names><![CDATA[José L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Woo-Reza]]></surname>
<given-names><![CDATA[José L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alcalá-Jáuregui]]></surname>
<given-names><![CDATA[Jorge A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguilar-Benítez]]></surname>
<given-names><![CDATA[Gisela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de San Luis Potosí Facultad de Agronomía y Veterinaria ]]></institution>
<addr-line><![CDATA[ San Luis Potosí]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,UASL Instituto de Investigación de Zonas Desérticas ]]></institution>
<addr-line><![CDATA[ San Luis Potosí]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<volume>44</volume>
<numero>1</numero>
<fpage>51</fpage>
<lpage>58</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-73802021000100051&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-73802021000100051&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-73802021000100051&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN En la búsqueda de mayor eficiencia de los fertilizantes se ha investigado la viabilidad de materiales naturales para la liberación lenta de nutrientes. Este trabajo tuvo el propósito de evaluar el efecto de un fertilizante organobentonita-fosfato (OBP) preparado por adsorción de fosfato sobre organobentonita (OB) en el crecimiento de plantas de lechuga (Lactuca sativa L.). Se evaluaron ocho tratamientos en un sistema hidropónico de raíz flotante con diferentes proporciones de P aportado con OBP (%) en soluciones Steiner con o sin P reducido (%): 1) 0/100, 2) 25/75, 3) 50/50, 4) 75/25, 5) 25/0, 6) 50/0, 7) 75/0 y 8) 100/0. El diseño experimental fue completamente al azar con seis repeticiones, cada unidad experimental fue una planta individual. Adicionalmente, en laboratorio se realizó un experimento sin plantas, para evaluar la liberación del P de la OBP. La liberación de P incrementó a mayor contenido de OBP; el P liberado a los 35 días fue mayor en el tratamiento 100/0 (7.27 mg L-1) y menor en los tratamientos 25/75 (3.27 mg L-1) y 25/0 (2.18 mg L-1). El consumo de P por las plantas fue mayor en los tratamientos con más fertilizante soluble en el medio debido a que la OBP liberó P lentamente. La OB puede adsorber P y posteriormente liberarlo gradualmente, lo que indica su uso potencial como fertilizante de lenta liberación.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[SUMMARY In the search for greater efficiency of fertilizers, the viability of natural materials for slow release of nutrients has been investigated. This study had the purpose of evaluating the effect of an organobentonite-phosphate (OBP) fertilizer prepared by phosphate adsorption on an organbentonite (OB) on the growth of lettuce plants (Lactuca sativa L.). Eight treatments were evaluated in a floating root hydroponic system with different proportions of P provided by OBP (%) in Steiner solutions with or without reduced P (%): 1) 0/100, 2) 25/75, 3) 50/50, 4) 75/25, 5) 25/0, 6) 50/0, 7) 75/0 and 8) 100/0. The experimental design was completely randomized with six replications; the experimental unit was an individual plant. In addition, an experiment without plants was carried out in laboratory to evaluate the release of P from OBP. The release of P increased with a higher content of OBP; the P released at 35 days was higher in treatment 100/0 (7,27 mg L-1) and lower in the 25/75 (3.27 mg L-1) and 25/0 (2,18 mg L-1) treatments. The consumption of P by the plants was higher in the treatments with more soluble fertilizer because the OBP released P slowly. Organobentonite can adsorb P and then release it gradually, indicating its potential use as a slow-release fertilizer.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Lactuca sativa L.]]></kwd>
<kwd lng="es"><![CDATA[adsorción]]></kwd>
<kwd lng="es"><![CDATA[fósforo]]></kwd>
<kwd lng="es"><![CDATA[nanofertilizante]]></kwd>
<kwd lng="es"><![CDATA[organoarcillas]]></kwd>
<kwd lng="en"><![CDATA[Lactuca sativa L.]]></kwd>
<kwd lng="en"><![CDATA[adsorption]]></kwd>
<kwd lng="en"><![CDATA[nanofertilizer]]></kwd>
<kwd lng="en"><![CDATA[organoclay]]></kwd>
<kwd lng="en"><![CDATA[phosphorus]]></kwd>
</kwd-group>
</article-meta>
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