<?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>0379-3982</journal-id>
<journal-title><![CDATA[Revista Tecnología en Marcha]]></journal-title>
<abbrev-journal-title><![CDATA[Tecnología en Marcha]]></abbrev-journal-title>
<issn>0379-3982</issn>
<publisher>
<publisher-name><![CDATA[Instituto Tecnológico de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0379-39822019000400116</article-id>
<article-id pub-id-type="doi">10.18845/tm.v32i4.4797</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Retención de carbono en un suelo dedicado al cultivo de piña (Ananas comosus (L.) bajo un manejo convencional y de mínima labranza]]></article-title>
<article-title xml:lang="en"><![CDATA[Carbon sequestration in a soil dedicated to the cultivation of pineapple (Ananas comosus (L.) under conventional management and minimum tillage]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fonseca-Vargas]]></surname>
<given-names><![CDATA[Ronald]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Furcal-Beriguete]]></surname>
<given-names><![CDATA[Parménides]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Campos-Rodríguez]]></surname>
<given-names><![CDATA[Rooel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Esquivel-Segura]]></surname>
<given-names><![CDATA[Edwin]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Tecnológico de Costa Rica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Tecnológico de Costa Rica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Tecnológico de Cos ta Rica Coordinador del Área Académica Agroforestal ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Tecnológico de Costa Rica Escuela de Ingeniería Forestal ]]></institution>
<addr-line><![CDATA[ Costa Rica]]></addr-line>
<country>Costa Rica</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>32</volume>
<numero>4</numero>
<fpage>116</fpage>
<lpage>132</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0379-39822019000400116&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0379-39822019000400116&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0379-39822019000400116&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La piña, Ananas comosus (L.), es un cultivo de importancia en Costa Rica con un área de siembra de aproximadamente 38 000 ha. El objetivo del estudio fue evaluar el contenido de carbono orgánico y la biomasa de la planta de piña en la etapa de crecimiento en un suelo bajo los sistemas de labranza convencional y labranza mínima. El experimento se estableció en una finca localizada a 10o 89&#8217;N y 84o 65&#8217;O, con una altitud que va desde 60 a 92 msnm y un relieve con pendiente de 5% al 15%. En la producción convencional la preparación del suelo conlleva la liberación de carbono hacia la atmósfera y la pérdida de materia orgánica. Lo anterior, en parte, ha motivado que su cultivo sea considerado uno de los más degradantes de suelo a nivel nacional. Mediante la aplicación de un tratamiento de labranza mínima y uno convencional se logró apreciar luego de tres años, que existen algunas variaciones en los niveles nutricionales de suelo y de la planta, mientras que, en relación con las variables productivas, en la etapa evaluada no fue posible determinar efectos atribuibles a la diferencia entre tratamientos. Tampoco se lograron evidenciar diferencias en el nivel de carbono de suelo y la relación C: N. Se concluye que el carbono de suelo puede llegar a variar, pero que es necesario profundizar más en la investigación para demostrar que la labranza mínima en piña puede traer beneficios en el almacenamiento de carbono orgánico. Se recomienda continuar con las mediciones de las variables analizadas, las cuales permitan observar lo reportado en otros cultivos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The pineapple, Ananas comosus (L.), is an important crop in Costa Rica with a planting area of approximately 38,000 ha. The objective of the study was evaluate the organic carbon content and biomass of the pineapple plant in the growing stage in a soil under conventional tillage and minimum tillage systems. The experiment was established on a farm located at 10°89&#8250;N and 84°65&#8250;W, with an altitude from 60 to 92 m above sea level and a slope of 5 % to 15 %. In conventional production, soil preparation leads to the release of carbon into the atmosphere and the loss of organic matter. Somehow, those issues have caused its cultivation to be considered one of the most degrading of the soil, nationwide. Through the application of a minimum tillage treatment and a conventional one, it was possible to appreciate that there are some variations in the nutritional levels of the plant and the soil, while in relation to the productive variables in the evaluated stage it was not possible to determine effects attributable to the difference between treatments. Neither was it possible to show differences in the soil carbon level and the C: N ratio. It is concluded that soil carbon may vary but it is necessary continue with the researcher to demonstrate that minimum pineapple tillage can bring benefits in the storage of organic carbon. It is recommended to continue with the measurements of the analyzed variables, which allow observing what is reported in other related investigations in crops.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Carbono orgánico]]></kwd>
<kwd lng="es"><![CDATA[conservación de suelos]]></kwd>
<kwd lng="es"><![CDATA[materia seca]]></kwd>
<kwd lng="es"><![CDATA[tratamiento]]></kwd>
<kwd lng="es"><![CDATA[cultivo de piña]]></kwd>
<kwd lng="es"><![CDATA[labranza en suelo]]></kwd>
<kwd lng="en"><![CDATA[Organic carbon]]></kwd>
<kwd lng="en"><![CDATA[soil conservation]]></kwd>
<kwd lng="en"><![CDATA[dry matter]]></kwd>
<kwd lng="en"><![CDATA[treatment]]></kwd>
<kwd lng="en"><![CDATA[pineapple cultivation]]></kwd>
<kwd lng="en"><![CDATA[tillage in soil]]></kwd>
</kwd-group>
</article-meta>
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