<?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>2310-3469</journal-id>
<journal-title><![CDATA[Revista Cubana de Ciencias Forestales]]></journal-title>
<abbrev-journal-title><![CDATA[Rev cubana ciencias forestales]]></abbrev-journal-title>
<issn>2310-3469</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Pinar del Río Hermanos Saíz Montes de Oca]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2310-34692019000300305</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Reactivación del crecimiento de árboles de navidad de Pseudotsuga menziesii (Mirb.) Franco mediante fertilización química]]></article-title>
<article-title xml:lang="en"><![CDATA[Reactivation of Christmas tree growth of Pseudotsuga menziesii (Mirb.) Franco by chemical fertilization]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Valera]]></surname>
<given-names><![CDATA[Rafael Ricardo]]></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[Cetina-Alcalá]]></surname>
<given-names><![CDATA[Víctor Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Trejo-Téllez]]></surname>
<given-names><![CDATA[Libia Iris]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Trinidad-Santos]]></surname>
<given-names><![CDATA[Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Tecnológico Superior de Zacapoaxtla  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Estatal de Colorado  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[ ]]></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>7</volume>
<numero>3</numero>
<fpage>305</fpage>
<lpage>324</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2310-34692019000300305&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2310-34692019000300305&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2310-34692019000300305&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La demanda de árboles de navidad se ha incrementado considerablemente en México, donde se comercializan entre 1.6 y 2.0 millones cada año. Pseudotsuga menziesii es una especie con alto potencial comercial, debido a la calidad de su madera y su preferencia como árbol de navidad. La investigación se realizó en Huayacocotla, Veracruz, México, para evaluar los efectos de nitrógeno, fósforo, potasio y micronutrimentos en la reactivación del crecimiento de brinzales de Pseudotsuga menziesii, a cuatro años de su establecimiento. Las fuentes y dosis de fertilizantes fueron 0.0 y 16.0; 0.0 y 16.5; y 0.0 y 17.0 gramos árbol-1 de urea, superfosfato triple de calcio y sulfato de potasio, respectivamente. La fuente de micronutrimentos fue el producto comercial Sagaquel combi® (0.0 y 3.0 mililitros árbol-1). Se condujo un experimento factorial completamente al azar 24, con 16 tratamientos replicados cinco veces. Se determinó que el nitrógeno y los micronutrimentos no tuvieron efectos significativos en la variable respuesta, dado que son poco deficientes. Por otra parte, la nutrición con fósforo incrementó el diámetro basal; sin embargo, este incremento no fue significativo. El potasio incrementó significativamente la biomasa de acículas. Los tratamientos que propiciaron mayor retención de acículas fueron aquellos que recibieron nitrógeno, fósforo y potasio o una combinación de ellos. Los análisis de suelo en laboratorio son probablemente más eficientes que los ensayos de fertilización para detectar deficiencias nutrimentales. Los nutrimentos deficientes en la plantación son el potasio, fósforo y nitrógeno, aunque la deficiencia de este último es ligera.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The demand for Christmas trees has increased considerably in Mexico; where 1.6 to 2.0 million of them are sold annually. Pseudotsuga menziesii is a species with high commercial potential, due to the quality of its wood and its preference as a Christmas tree. The research was carried out at Huayacocotla, Veracruz, Mexico to assess the effects of nitrogen, phosphorus, potassium and micronutrients on growth of seedlings of P. menziesii, four years after its establishment. The sources and doses for the macronutrients were 0.0 and 16.0, 0.0 and 16.5, and 0.0 and 17.0 grams tree-1 of urea, calcium triple superphosphate, and potassium sulfate, respectively. The source for micronutrients was the commercial product Sagaquel combi® (0.0 and 3.0 mililiters tree-1). We conducted a completely randomized factorial experiment 24, with a total of 16 treatments fivefold replicated. It was determined that the nitrogen and micronutrients had no significant effects on the response variables since they were just slightly deficient. On the other hand, nutrition with phosphorus increased basal diameter; however, such increase was not significant. Potassium significantly increased needle biomass. The treatments that induced greater retention of needles were those that received nitrogen, phosphorus and potassium or a combination of them. Laboratory soil analyzes are likely to be more efficient than fertilization trials at detecting nutrient deficiencies. The deficient nutrients in the plantation are potassium, phosphorus, and nitrogen, although the deficiency of the latter is slight.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[análisis de suelo]]></kwd>
<kwd lng="es"><![CDATA[árbol de navidad]]></kwd>
<kwd lng="es"><![CDATA[estado nutrimental]]></kwd>
<kwd lng="es"><![CDATA[fertilización]]></kwd>
<kwd lng="es"><![CDATA[retención de follaje.]]></kwd>
<kwd lng="en"><![CDATA[soil analysis]]></kwd>
<kwd lng="en"><![CDATA[Christmas tree]]></kwd>
<kwd lng="en"><![CDATA[nutrient status]]></kwd>
<kwd lng="en"><![CDATA[fertilization]]></kwd>
<kwd lng="en"><![CDATA[foliage retention.]]></kwd>
</kwd-group>
</article-meta>
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