<?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>S0377-94242016000200033</article-id>
<article-id pub-id-type="doi">10.15517/rac.v40i2.27360</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto de la aplicación de enmiendas líquidas en el suelo y en el crecimiento de maíz bajo condiciones de invernadero]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of liquid liming on soil and corn growth in greenhouse conditions.]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Garbanzo-León]]></surname>
<given-names><![CDATA[Gabriel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Molina-Rojas]]></surname>
<given-names><![CDATA[Eloy]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cabalceta-Aguilar]]></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[ ]]></addr-line>
<country>CR</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<volume>40</volume>
<numero>2</numero>
<fpage>33</fpage>
<lpage>52</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0377-94242016000200033&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0377-94242016000200033&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0377-94242016000200033&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[ResumenSe evaluó el efecto de 3 enmiendas líquidas en la fertilidad de un Ultisol, cultivado con maíz bajo condiciones de invernadero. El estudio se realizó en macetas de 1,0 y 0,5 l de suelo proveniente de Orosí, Cartago, con acidez intercambiable de 4,64 cmol.l-1, a partir de enmiendas líquidas de Cal 56 (C56) y Surkal (SK) y el carbonato de calcio en polvo mojable Surflow Calcio (SC), diluidas en agua y aplicadas en 2 dosis cada una. Se realizaron análisis de pH y acidez intercambiable en diferentes momentos durante un período de 61 días después de aplicadas (dda) las enmiendas, en macetas sin plantas. También se realizaron análisis de fertilidad a los 45 días después de la siembra, y se llevaron a cabo mediciones de altura de las plantas, largo de las raíces y peso seco de la biomasa del maíz, en macetas con plantas. La aplicación de las enmiendas C56 y SK disminuyó la acidez intercambiable y elevó el pH en forma proporcional a la dosis durante los primeros 14 dda. A partir de los 27 días la acidez empezó a subir y el pH a bajar. Con el SC la acidez se mantuvo baja y el pH alto durante todo el período de evaluación debido que se aplicó una dosis mayor que las enmiendas líquidas. La fertilidad del suelo mejoró con la aplicación de enmiendas, principalmente en los tratamientos de SC. La aplicación de enmiendas incrementó la altura de las plantas, longitud de las raíces y el peso seco de la biomasa del maíz. El SK produjo mayor acumulación de materia seca aérea, sin embargo, con el producto C56 se determinó una mayor densidad longitudinal de raíces. Se concluye que las cales en presentación líquida pueden disminuir la acidez del suelo de manera rápida con un efecto residual superior a los 61 días, siendo una alternativa potencial para etapas fenológicas críticas bajo condiciones de invernadero.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[AbstractThe effect of 3 liquid amendments on ultisol fertility, cultivated with corn under greenhouse conditions was evaluated. The study was conducted in 1.0 and 0.5 l pots containing soil from Orosi, Cartago, with exchangeable acidity of 4.64 cmol.l-1, using liquid amendments Cal 56 (C56) and surkal (SK), and calcium carbonate in wettable powder Surflow calcium (SC), diluted in water and applied in 2 doses each. Soil pH and exchangeable acidity analyses were made at different times over a 61-days period after lime application (daa), in pots with no plants soil fertility analyses were also done at 45 days after planting, and measurements of plant height, root length, and dry corn biomass weight were taken in pots with plants. The application of SK and C56 amendments decreased exchangeable acidity and increased pH in proportion to the dose during the first 14 daa. Soil acidity began to rise and pH started to drop at 27 daa. Soil acidity was low and pH was high throughout the evaluation period with SC treatment because this lime was applied at a higher dose than liquid amendments. Soil fertility improved with liming application, mainly with the SC treatments. Amendment application increased plant height, root length, and dry corn biomass weight. SK produced higher aerial dry matter accumulation; however, with C56 a greater longitudinal root density was determined. It is concluded that liquid lime can reduce soil acidity rapidly with more than 61 days residual effect, being a potential alternative for critical growth stages in crops under greenhouse conditions.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Aluminio]]></kwd>
<kwd lng="es"><![CDATA[enmienda]]></kwd>
<kwd lng="es"><![CDATA[calcio]]></kwd>
<kwd lng="es"><![CDATA[ultisol]]></kwd>
<kwd lng="es"><![CDATA[maíz]]></kwd>
<kwd lng="en"><![CDATA[Aluminum]]></kwd>
<kwd lng="en"><![CDATA[lime]]></kwd>
<kwd lng="en"><![CDATA[calcium]]></kwd>
<kwd lng="en"><![CDATA[ultisol]]></kwd>
<kwd lng="en"><![CDATA[corn]]></kwd>
</kwd-group>
</article-meta>
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