<?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>2007-1132</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias forestales]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. forestales]]></abbrev-journal-title>
<issn>2007-1132</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11322020000200069</article-id>
<article-id pub-id-type="doi">10.29298/rmcf.v11i58.594</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Concentraciones críticas nutrimentales y normas DRIS para árboles de medio turno de Cedrela odorata L.]]></article-title>
<article-title xml:lang="en"><![CDATA[Critical nutrient concentrations and DRIS norms for mid-rotation Cedrela odorata L. trees]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Parra Piedra]]></surname>
<given-names><![CDATA[Luis Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López López]]></surname>
<given-names><![CDATA[Miguel Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez Guerrero]]></surname>
<given-names><![CDATA[Armando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ordaz Chaparro]]></surname>
<given-names><![CDATA[Víctor Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados Posgrado en Ciencias Forestales ]]></institution>
<addr-line><![CDATA[Montecillo ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Colegio de Postgraduados Posgrado en Edafología ]]></institution>
<addr-line><![CDATA[Montecillo ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2020</year>
</pub-date>
<volume>11</volume>
<numero>58</numero>
<fpage>69</fpage>
<lpage>91</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11322020000200069&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11322020000200069&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11322020000200069&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El diagnóstico nutrimental ayuda a mejorar la eficiencia del uso de fertilizantes en plantaciones forestales y a incrementar tanto las utilidades económicas, como los beneficios ecológicos. Dos métodos comúnmente usados, para tal efecto, son las concentraciones críticas y el Sistema Integrado de Diagnóstico y Recomendación (DRIS); sin embargo, no existen estudios que aporten los valores críticos o normas DRIS para Cedrela odorata (cedro rojo), especie importante en las regiones tropicales. El objetivo del presente estudio fue desarrollar un conjunto de concentraciones críticas y uno de normas DRIS para C. odorata en su etapa de medio turno. El estudio se realizó con 74 árboles localizados a lo largo del área de distribución natural del taxon en México, a los cuales se les determinó el incremento diamétrico y la concentración nutrimental entre julio de 2017 y enero de 2018. Se derivó un conjunto de concentraciones críticas y uno de normas DRIS. Una segunda fase fue la verificación de las concentraciones críticas y normas DRIS generadas, mediante un experimento en una plantación de cedro rojo de medio turno. El ensayo fue completamente al azar con arreglo factorial 3 × 4, en el que los factores correspondieron a la aplicación de P y K, respectivamente. Se presenta un conjunto de concentraciones críticas y uno de normas DRIS para árboles de C. odorata de medio turno. El proceso de verificación indica que ambos conjuntos de valores de referencia predicen correctamente el estado nutrimental de los árboles de medio turno del cedro rojo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Nutrient diagnosis helps increase fertilizer use efficiency in forest plantations as well as economic profits and ecological benefits. Two of the methods commonly used for diagnosis of the nutrient status are critical nutrient concentrations and the Diagnosis and Recommendation Integrated System (DRIS); however, no studies exist that show the critical values or DRIS norms for Cedrela odorata (red cedar); which is an important tropical tree species. The aim of the present study was to develop a set of critical nutrient concentrations and a set of DRIS norms as well, for C. odorata at the mid-rotation stage. The study was carried out by selecting 74 trees located over the species natural distribution area in Mexico, on which diameter increment and nutrient concentration was recorded from July 2017 to January 2018. A set of critical nutrient concentrations and one more of DRIS norms were developed. In a second phase of the study, both nutrient standards were verified by using an experiment installed within a red cedar mid-rotation plantation. The experimental design was a complete randomized, with a 3×4 factorial arrangement of treatments, where the factors corresponded to the application of P and K, respectively. A set of critical nutrient concentrations and a set of DRIS norms for C. odorata at its mid-rotation stage are exhibited in this paper. The verification process indicates that both reference sets correctly predict nutrient status of mid-rotation red cedar trees.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Cedro rojo]]></kwd>
<kwd lng="es"><![CDATA[diagnóstico nutrimental]]></kwd>
<kwd lng="es"><![CDATA[fertilización]]></kwd>
<kwd lng="es"><![CDATA[nutrición forestal]]></kwd>
<kwd lng="es"><![CDATA[nutrimento]]></kwd>
<kwd lng="es"><![CDATA[Sistema Integrado de Diagnóstico y Recomendación]]></kwd>
<kwd lng="en"><![CDATA[Red cedar]]></kwd>
<kwd lng="en"><![CDATA[nutrient diagnosis]]></kwd>
<kwd lng="en"><![CDATA[fertilization]]></kwd>
<kwd lng="en"><![CDATA[forest nutrition]]></kwd>
<kwd lng="en"><![CDATA[nutrients]]></kwd>
<kwd lng="en"><![CDATA[Diagnosis and Recommendation Integrated System]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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<name>
<surname><![CDATA[Wells]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Allen]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<source><![CDATA[When and where apply fertilizer? A loblolly pine management guide]]></source>
<year>1985</year>
<page-range>23</page-range><publisher-loc><![CDATA[Asheville, NC, USA ]]></publisher-loc>
<publisher-name><![CDATA[Gen. Tech. Rep]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
