<?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>2007-0705</journal-id>
<journal-title><![CDATA[Nova scientia]]></journal-title>
<abbrev-journal-title><![CDATA[Nova scientia]]></abbrev-journal-title>
<issn>2007-0705</issn>
<publisher>
<publisher-name><![CDATA[Universidad de La Salle Bajío A. C., Coordinación de Investigación]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-07052016000100123</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Diagnóstico de la calidad del agua en los viveros forestales de México]]></article-title>
<article-title xml:lang="en"><![CDATA[Diagnosis of water quality of the forest nurseries in Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez García]]></surname>
<given-names><![CDATA[J. Valentín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Olvera España]]></surname>
<given-names><![CDATA[Miriam]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez Trejo]]></surname>
<given-names><![CDATA[Dante Arturo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aldrete]]></surname>
<given-names><![CDATA[Arnulfo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cibrián Tovar]]></surname>
<given-names><![CDATA[David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez Méndez]]></surname>
<given-names><![CDATA[Cirilo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castro Zavala]]></surname>
<given-names><![CDATA[Salvador]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Chapingo División de Ciencias Forestales ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Colegio de Posgraduados  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Gobierno de la Ciudad de México  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2016</year>
</pub-date>
<volume>8</volume>
<numero>16</numero>
<fpage>123</fpage>
<lpage>139</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-07052016000100123&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-07052016000100123&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-07052016000100123&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción:  Un vivero forestal debe contar con abundante provisión de agua de calidad. El agua de características deficientes puede contener sales, iones tóxicos, contaminantes o fitopatógenos. No obstante, en México la calidad del agua en dichos viveros ha recibido poca atención. Por ello, se planteó como objetivo realizar un diagnóstico de la calidad del agua en viveros forestales de México.  Método:  En 148 viveros forestales ubicados en la República Mexicana que producen planta en contenedor o en bolsa, fueron obtenidas muestras de 1 L de agua. Éstas se analizaron en el Laboratorio Central de la Universidad Autónoma Chapingo. Fueron estimados los parámetros de pH, conductividad eléctrica, concentración de bicarbonatos, calcio, boro, magnesio, sulfatos, sodio y cloro. Con los datos obtenidos se calculó la dureza total y la relación ajustada de adsorción de sodio (esta última para viveros que producen en bolsa).  Resultados:  Los parámetros que excedieron los límites establecidos fueron: pH con 84% (125 viveros), conductividad eléctrica con 34% (50 viveros), y concentración de bicarbonatos con 77% (114 viveros); en el resto de los parámetros medidos sólo un pequeño porcentaje está por arriba de los valores estándar. De todos los viveros, seis que producen en contenedor y dos que producen en bolsa, cumplen con los parámetros de calidad de agua, el resto tienen por lo menos un valor que no cumple con los límites establecidos.  Conclusión:  Con base en la proporción de viveros de cada región ecológica, la región templada sobresale con pH y bicarbonatos en altas concentraciones, y la región tropical húmeda presenta valores elevados en conductividad eléctrica. Se recomienda siempre seleccionar la ubicación del vivero entre otros factores, para contar con una fuente de agua de calidad.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction:  A forest nursery must be provided with abundant water of good quality water. The water with low quality may contain salts, toxic ions, pollutants or diseases. However, in Mexico the quality of water in forest nurseries has received little attention in research. Because of that in this work is performed a diagnosis of the water quality in forest nurseries of Mexico.  Method:  In 148 containerized forest nurseries ubicated in Mexico, 1 L irrigation water samples were obteined. Such samples were analyzed in the Central laboratory of the Universidad Autónoma Chapingo. From the samples were determined the parameters pH, electric conductivity, concentration of bicarbonates, Ca, B, Mg, sulfates, Na and Cl. With the obtained data was calculated the total hardiness and the adjusted sodium adsorption ratio (this last for nurseries that produce the trees in plastic bags).  Results:  The parameters that exceded the established limits were: pH (84%, 125 forest nurseries), electric conductivity (34%, 50 forest nurseries), and bicarbonate concentration (77%, 114 nurseries); for the rest of measured parameters, only a small percentage excedes the limit values. From all of the forest nurseries, six that produce in containers and two that produce in plastic bags, fulfill the parameters of quality of water. The rest of nurseries have at least one parameter out of the established limits.  Conclusion:  Most of the forest nurseries in the temperate region have water with high pH and bicarbonates, while high proportion of those in tropical regions have water with high electric conductivity. It is convenient to choose a good location for the establishment of forest nurseries, in order of having availability of a source of good quality water.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[viveros forestales]]></kwd>
<kwd lng="es"><![CDATA[calidad del agua]]></kwd>
<kwd lng="es"><![CDATA[calidad de planta]]></kwd>
<kwd lng="es"><![CDATA[producción de árboles]]></kwd>
<kwd lng="en"><![CDATA[forest nurseries]]></kwd>
<kwd lng="en"><![CDATA[water quality]]></kwd>
<kwd lng="en"><![CDATA[seedling quality]]></kwd>
<kwd lng="en"><![CDATA[tree production]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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