<?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>2007-9028</journal-id>
<journal-title><![CDATA[Ecosistemas y recursos agropecuarios]]></journal-title>
<abbrev-journal-title><![CDATA[Ecosistemas y recur. agropecuarios]]></abbrev-journal-title>
<issn>2007-9028</issn>
<publisher>
<publisher-name><![CDATA[Universidad Juárez Autónoma de Tabasco, Dirección de Investigación y Posgrado]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-90282023000200004</article-id>
<article-id pub-id-type="doi">10.19136/era.a10n2.3417</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Densidad de longitud de raíces finas de teca, en un Vertisol Léptico de Tabasco, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Length density of fine roots in teak, in a Leptic Vertisol soil in Tabasco, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Córdova-Sánchez]]></surname>
<given-names><![CDATA[Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Obrador-Olán]]></surname>
<given-names><![CDATA[José Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castelán-Estrada]]></surname>
<given-names><![CDATA[Mepivoseth]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Palma-López]]></surname>
<given-names><![CDATA[David Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-López]]></surname>
<given-names><![CDATA[Eustolia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villanueva-López]]></surname>
<given-names><![CDATA[Gilberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pascual-Córdova]]></surname>
<given-names><![CDATA[Guillermina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados Programa de Doctorado en Ciencias Agrícolas ]]></institution>
<addr-line><![CDATA[H. Cárdenas Tabasco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Politécnica del Golfo de México  ]]></institution>
<addr-line><![CDATA[Paraíso Tabasco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,El Colegio de la Frontera Sur  ]]></institution>
<addr-line><![CDATA[Villahermosa Tabasco]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2023</year>
</pub-date>
<volume>10</volume>
<numero>2</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-90282023000200004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-90282023000200004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-90282023000200004&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen. Las raíces finas (&#8804; 2 mm de diámetro) en los árboles son de vida corta, en condiciones de sequía y baja fertilidad éstas alcanzan mayor longitud por unidad de volumen de suelo; así, la densidad de longitud de raíces es una variable que indica el potencial de absorción de agua y nutrientes que tiene el árbol. El objetivo del presente estudio fue estimar la densidad de longitud de raíces finas (DLRF) su distribución en profundidad y distancia de la base del árbol de teca, por el efecto de la fertilización sintética y abono verde. La metodología utilizada fue la del cilindro, a los 36 meses de edad de los árboles de teca, se tomaron muestras verticales de suelos, cada 10 cm hasta 40 cm de profundidad en las cuatro caras del perfil; y a los 46 meses se muestreó horizontalmente a tres distancias de la base del árbol: 50, 100 y 175 cm, en un diseño de bloques completos al azar. Los resultados muestran que los tratamientos con mayor DLRF fueron: la dosis 60-60-60 kg ha-1 sin abono verde y el testigo con abono verde. La DLRF fue mayor en la profundidad 20-30 cm y 10-20 cm a los 38 y 46 meses. La distancia de 50 cm de la base del árbol mostró mayor DLRF (0.75 km.m&#8722;3). La DLRF disminuyó cuando se incrementó la dosis de fertilización sintética o cuando se estableció abono verde (Crotalaria juncea L.).]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract. The fine roots (&#8804; 2 mm in diameter) in the trees are short-lived, in conditions of drought and low fertility they reach a greater length per unit volume of soil; Thus, the root length density is a variable that indicates the water and nutrient absorption potential of the tree. The objective of this study was to estimate the fine root length density (DLRF) its distribution in depth and distance from the base of the three-year-old teak tree, due to the effect of chemical fertilization and a green manure. The methodology used was that of the cylinder, at 36 months of age of the teak trees, vertical soil samples were taken, every 10 cm up to 40 cm deep on the four faces of the profile; and at 46 months it was sampled horizontally at three distances from the base of the tree: 50, 100 and 175 cm, in a randomized complete block design. The results show that the treatments with the highest DLRF were: the 60-60-60 kg ha-1 dose without Green Manure and the control with Green Manure. The DLRF was greater at depth 20-30 cm and 10-20 cm at 38 and 46 months. At a distance of 50 cm from the base of the tree, it showed higher DLRF (0.75 km.m&#8722;3). The DLRF decreased when the chemical fertilization dose was increased or when green manure (Crotalaria juncea L.) was established.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Abono verde]]></kwd>
<kwd lng="es"><![CDATA[Tectona grandis]]></kwd>
<kwd lng="es"><![CDATA[Crotalaria]]></kwd>
<kwd lng="es"><![CDATA[fertilización sintética]]></kwd>
<kwd lng="es"><![CDATA[perfil edáfico]]></kwd>
<kwd lng="en"><![CDATA[Green manure]]></kwd>
<kwd lng="en"><![CDATA[Tectona grandis]]></kwd>
<kwd lng="en"><![CDATA[Crotalaria]]></kwd>
<kwd lng="en"><![CDATA[synthetic fertilization]]></kwd>
<kwd lng="en"><![CDATA[edaphic profile]]></kwd>
</kwd-group>
</article-meta>
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