<?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>1405-3195</journal-id>
<journal-title><![CDATA[Agrociencia]]></journal-title>
<abbrev-journal-title><![CDATA[Agrociencia]]></abbrev-journal-title>
<issn>1405-3195</issn>
<publisher>
<publisher-name><![CDATA[Colegio de Postgraduados]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-31952018000400639</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Caracterización física y química de materiales orgánicos para sustratos agrícolas]]></article-title>
<article-title xml:lang="en"><![CDATA[Physical and chemical characterization of organic materials for agricultural substrates]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gayosso-Rodríguez]]></surname>
<given-names><![CDATA[Salomé]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Borges-Gómez]]></surname>
<given-names><![CDATA[Lizette]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villanueva-Couoh]]></surname>
<given-names><![CDATA[Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Estrada-Botello]]></surname>
<given-names><![CDATA[Maximiano A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Garruña]]></surname>
<given-names><![CDATA[René]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Tecnológico de Conkal  ]]></institution>
<addr-line><![CDATA[Conkal Yucatán]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Juárez Autónoma de Tabasco División Académica de Ciencias Agropecuarias ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<volume>52</volume>
<numero>4</numero>
<fpage>639</fpage>
<lpage>652</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-31952018000400639&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-31952018000400639&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-31952018000400639&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Algunos sustratos usados para producir plantas en contenedor son costosos y se extraen de ecosistemas naturales. Los materiales alternativos deben ser económicos e inocuos. En Yucatán, México, existen materiales orgánicos con potencial como sustratos para contenedor. El objetivo de esta investigación fue evaluar las propiedades físicas y químicas de aserrín de pino (Pinus sp.) (&#8804;2), viruta de pino (&#8804;5 y &#8804;10 mm), fibra de coco (Cocos nucifera L.) (&#8804;5 y &#8804;10 mm), sargazo (Sargassum sp.) (&#8804;5 y &#8804;10 mm), bagazo de henequén (Agave fourcroydes Lem.) (&#8804;10 mm) y hoja de &#8216;dzidzilche&#8217; (Gimmopodium floribundum Rolfe) (&#8804;10 mm), que pueden estar disponibles en la región. El diseño experimental fue completamente al azar, con nueve tratamientos y tres repeticiones. Las variables evaluadas fueron diámetro medio de partícula, densidad aparente, porosidad total, porosidad de aireación, porosidad de retención de agua, mojabilidad, pH, conductividad eléctrica, materia orgánica, capacidad de intercambio catiónico, concentración de N y contenidos de C, K+, Ca2+, Mg2+ y Na+. Además, curvas de retención de humedad se elaboraron y la actividad biológica se midió. El aserrín de pino, la fibra de coco y el sargazo, con tamaños de partículas &#8804;5 mm, tuvieron alrededor de 30 % de porosidad para aireación y superaron 50 % la porosidad para retención de agua. El aserrín y la viruta de pino retuvieron entre 24 y 40 % de agua totalmente disponible. Los materiales tuvieron pH cercano a 7 y conductividad eléctrica &#8804;1.5 dS m-1. El contenido de N, P, K+ y Ca2+ en bagazo de henequén y hoja de dzidzilche estuvieron en el intervalo sugerido para un sustrato ideal. Por lo tanto, el aserrín, el bagazo de henequén, la hoja de dzilzidche, la fibra de coco y la viruta de pino en partículas &#8804;5 mm tienen características para ser componentes de sustratos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Some substrates used to grow plants in containers are expensive and are extracted from natural ecosystems. Alternative materials should be inexpensive and innocuous. Some organic materials found in Yucatan, Mexico, could be potentially used as substrate for containers. The objective of this research was to evaluate the physical and chemical properties of pine sawdust (Pinus sp.) (&#8804;2), pine shavings (&#8804;5 and &#8804;10 mm), cocopeat (Cocos nucifera L.) (&#8804;5 and &#8804;10 mm), gulfweed (Sargassum sp.) (&#8804;5 and &#8804;10 mm), henequen pulp (Agave fourcyoydes Lem.) (&#8804;10 mm), and dzidzilche leaf (Gimmopodium floribundum Rolfe) (&#8804;10 mm). All these materials may be available in the region. The experimental design was completely random, with nine treatments and three replications. The following variables were evaluated: average particle diameter, apparent density, absolute porosity, ventilation porosity, water retention porosity, wettability, pH, specific conductance, organic material, caption exchange capacity, N concentration, and C, K+, Ca2+, Mg2+ and Na+ content. Additionally, water retention curves were developed and biological activity was measured. Pine sawdust, cocopeat, and gulfweed (with &#8804;5 mm particle size) had about 30 % of ventilation porosity and over 50 % of water retention porosity. Pine sawdust and shavings retained 24-40 % of the total available water. The pH of the materials almost reached 7 and their specific conductance was &#8804;1.5 dS m-1. The N, P, K+, and Na2+ content of henequen pulp and dzidzilche leaf matched the suggested interval for an ideal substrate. Therefore, sawdust, henequen pulp, dzilzidche leaf, cocopeat, and pine shavings with &#8804;5 mm particles have the appropriate characteristics to be used as substrate components.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Agave fourcroydes Lem.]]></kwd>
<kwd lng="es"><![CDATA[curvas de retención]]></kwd>
<kwd lng="es"><![CDATA[Gimmopodium floribundum Rolfe.]]></kwd>
<kwd lng="es"><![CDATA[Sargassum sp.]]></kwd>
<kwd lng="es"><![CDATA[sustratos alternativos]]></kwd>
<kwd lng="es"><![CDATA[tamaño de partículas]]></kwd>
<kwd lng="en"><![CDATA[Agave fourcyoydes lem.]]></kwd>
<kwd lng="en"><![CDATA[retention curves]]></kwd>
<kwd lng="en"><![CDATA[Gimmopodium floribundum Rolfe.]]></kwd>
<kwd lng="en"><![CDATA[Sargassum sp.]]></kwd>
<kwd lng="en"><![CDATA[alternative substrates]]></kwd>
<kwd lng="en"><![CDATA[particle size]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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