<?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>0120-2812</journal-id>
<journal-title><![CDATA[Acta Agronómica]]></journal-title>
<abbrev-journal-title><![CDATA[Acta Agron.]]></abbrev-journal-title>
<issn>0120-2812</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-28122018000100086</article-id>
<article-id pub-id-type="doi">10.15446/acag.v67n1.57988</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Absorption curves - mineral-extraction under an aeroponic system for white chrysanthemum (Dendranthema grandiflorum (Ramat.) Kitam. cv. Atlantis White)]]></article-title>
<article-title xml:lang="es"><![CDATA[Curvas de absorción-extracción mineral bajo un sistema aeropónico para crisantemo blanco (Dendranthemagrandiflorum (Ramat.) Kitam. cv. Atlantis White)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chica Toro]]></surname>
<given-names><![CDATA[Faber de Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Garzón-González]]></surname>
<given-names><![CDATA[Jorge M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Catolica de Oriente Faculty of Agricultural Sciences ]]></institution>
<addr-line><![CDATA[ Antioquia]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2018</year>
</pub-date>
<volume>67</volume>
<numero>1</numero>
<fpage>86</fpage>
<lpage>93</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-28122018000100086&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-28122018000100086&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-28122018000100086&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The aim of this study focused on the construction of the absorption and extraction curves under an aeroponic system for White chrysanthemum cv. Atlantis White, and therefore, propose the periods of maximum and minimum nutrient accumulation from aboveground, root and total biomass. Vegetative cycle of the plant, measured from the day after transplantation (dat) to aeroponic system, and the first day of court lasted 49 days. Evaluations were carried out each week on plants, in absolute competition. For the average aboveground biomass, three replicates were recorded. To obtain total root biomass only one sample, was measured. Therefore, total biomass in average, had achieved 130.9313 g.plant-1, where 72.26% (94.163 g) corresponded to the aboveground biomass and 27.74% (36.3183 g) to root biomass. From nutrient contents reported in tissue analysis and biomass, nutrients absorbed-extracted were calculated. Overall, two plant stages development in nutrient absorption were observed as follows: the first, at day 21 dat; and second, from day 22 to day 49 dat. In this study, the reported elements (N, P, K, Ca, Mg and S), its accumulation during the first stage did not exceeded 29%, except for S, which reached 30.19%. Consequently, the mostly close to 70% nutrients were absorbed in the second stage of development, which coincided with the plant reproductive stage.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo de este estudio se centró en la construcción de las curvas de absorción-extracción bajo un sistema aeropónico para crisantemo blanco cv. Atlantis White y así plantear los periodos de máxima y mínima acumulación de nutrientes de las biomasas aérea, radical y total. El ciclo vegetativo de la planta, medido desde el día de trasplante (ddt) al sistema aeropónico y el día de inicio de corte, duró 49 días. Las evaluaciones se realizaron cada semana sobre plantas en competencia absoluta. Para el promedio de la biomasa aérea se tomaron tres repeticiones, para la biomasa radical se tomó una sola muestra. La biomasa total promedio alcanzada fue de 130.9313 g planta-1, de la cual el 72.26% (94.163 g) correspondió a la parte aérea y el 27.74% (36.3183 g) a la radical. A partir de contenidos de nutrientes reportados en los análisis de tejidos y las biomasas se calculan los nutrientes absorbidos-extraídos. En términos generales, se observan dos etapas en la absorción de nutrientes, una primera hasta el día 21 ddt y la segunda desde el día 22 hasta el día 49 ddt. Para los elementos reportados en este estudio (N, P, K, Ca, Mg y S); su acumulación durante la primera etapa no supero el 29%, excepto el S que llegó hasta el 30.19 %. En consecuencia, la mayor cantidad de nutrientes, cerca al 70%, fueron absorbidas en la segunda etapa de desarrollo, coincidente con la fase reproductiva de la planta.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[macronutrients]]></kwd>
<kwd lng="en"><![CDATA[nutrient balance (plants)]]></kwd>
<kwd lng="en"><![CDATA[nutritional status]]></kwd>
<kwd lng="en"><![CDATA[ornamental species]]></kwd>
<kwd lng="en"><![CDATA[plant development stage]]></kwd>
<kwd lng="en"><![CDATA[plant nutrition]]></kwd>
<kwd lng="en"><![CDATA[plant soil relations]]></kwd>
<kwd lng="es"><![CDATA[Balance de nutrientes (plantas)]]></kwd>
<kwd lng="es"><![CDATA[especies ornamentales]]></kwd>
<kwd lng="es"><![CDATA[estatus nutricional]]></kwd>
<kwd lng="es"><![CDATA[etapa de desarrollo vegetal]]></kwd>
<kwd lng="es"><![CDATA[nutrición vegetal]]></kwd>
<kwd lng="es"><![CDATA[macronutrientes]]></kwd>
<kwd lng="es"><![CDATA[relaciones planta-suelo]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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