<?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>0377-9424</journal-id>
<journal-title><![CDATA[Agronomía Costarricense]]></journal-title>
<abbrev-journal-title><![CDATA[Agron. Costarricense]]></abbrev-journal-title>
<issn>0377-9424</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica. Colegio de Ingenieros y Agrónomos. Ministerio de Agricultura y Ganadería]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0377-94242015000200047</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evaluación de fertilizantes líquidos con silicio, calcio o magnesio sobre el crecimiento del sorgo en invernadero]]></article-title>
<article-title xml:lang="en"><![CDATA[Evaluation of silicon, calcium and magnesium in liquid fertilizers on sorghum growth in the greenhouse]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Araya]]></surname>
<given-names><![CDATA[Mario A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Camacho]]></surname>
<given-names><![CDATA[Manuel E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Molina]]></surname>
<given-names><![CDATA[Eloy]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cabalceta]]></surname>
<given-names><![CDATA[Gilberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Costa Rica  ]]></institution>
<addr-line><![CDATA[ San José]]></addr-line>
<country>CR</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2015</year>
</pub-date>
<volume>39</volume>
<numero>2</numero>
<fpage>47</fpage>
<lpage>60</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0377-94242015000200047&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0377-94242015000200047&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0377-94242015000200047&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[ResumenSe evaluó el uso de fertilizantes líquidos con Si, Ca o Mg sobre el crecimiento del sorgo (Sorghum bicolor) en un Ultisol bajo invernadero. Se utilizaron 2 silicatos de potasio, carbonato de calcio y óxido de magnesio, todos en líquidos aplicados al suelo en dosis de 2 y 4 ml.pote-1, y un testigo, en un diseño irrestricto al azar con 9 tratamientos y 4 repeticiones. Las variables de crecimiento, evaluadas 45 días después de siembra, fueron peso seco de raíz y de parte aérea. Se realizó un análisis de suelos y de planta al final del ensayo. Las aplicaciones de Ca y de Mg incrementaron de manera significativa el crecimiento y la absorción de nutrimentos del sorgo. El carbonato de calcio promovió los valores más altos de biomasa seca y de absorción de N, P, Ca, S, Cu, Zn, Mn y B. Las fuentes de Si no tuvieron efectos significativos sobre la biomasa del sorgo, a excepción del silicato de K con Ca y Mg en dosis de 4 ml.pote-1, que además produjo un incremento significativo en la absorción de K. El carbonato de calcio y el óxido de magnesio incrementaron significativamente el pH, disminuyeron la acidez y el Al intercambiable, y aumentaron los contenidos de Ca o Mg en el suelo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[AbstractThe effect of liquid fertilizers with Si, Ca or Mg on the growth of sorghum (Sorghum bicolor) was evaluated in an Ultisol under greenhouse conditions. Four liquid fertilizers (two potassium silicates, calcium carbonate and magnesium oxide) were applied into the soil in liquids at doses of 2 and 4 ml.pot-1, plus a control, in a randomized unrestricted design with 9 treatments and 4 replicates. Growth variables, assessed 45 days after sowing, were dry weight of root and aerial parts. Analysis of soil and plant at the end of the test was performed. The application of Ca and Mg significantly increased growth and nutrient uptake of sorghum. Liquid calcium carbonate promoted the highest values of dry biomass and absorption of N, P, Ca, S, Cu, Zn, Mn and B. Si sources had no significant effects on biomass, except for K silicate with Ca and Mg at the dose of 4 ml.pot-1, which also produced a significant increase in K absorption. Calcium carbonate and magnesium oxide significantly increased soil pH and decreased exchangeable acidity and Al, and also increased Ca or Mg content in the soil.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Silicio]]></kwd>
<kwd lng="es"><![CDATA[calcio]]></kwd>
<kwd lng="es"><![CDATA[magnesio]]></kwd>
<kwd lng="es"><![CDATA[fertilizante]]></kwd>
<kwd lng="es"><![CDATA[sorgo]]></kwd>
<kwd lng="en"><![CDATA[Silicon]]></kwd>
<kwd lng="en"><![CDATA[calcium]]></kwd>
<kwd lng="en"><![CDATA[magnesium]]></kwd>
<kwd lng="en"><![CDATA[fertilizer]]></kwd>
<kwd lng="en"><![CDATA[sorghum]]></kwd>
</kwd-group>
</article-meta>
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