<?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>0120-9965</journal-id>
<journal-title><![CDATA[Agronomía Colombiana]]></journal-title>
<abbrev-journal-title><![CDATA[Agron. colomb.]]></abbrev-journal-title>
<issn>0120-9965</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia, Facultad de Agronomía]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-99652022000200311</article-id>
<article-id pub-id-type="doi">10.15446/agron.colomb.v40n2.100425</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Assessment of physicochemical characteristics of biofertilizers and their role in the rooting capacity of plants]]></article-title>
<article-title xml:lang="es"><![CDATA[Evaluación de las características fisicoquímicas de biofertilizantes y su papel sobre la capacidad de enraizamiento de plantas]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Karapetyan]]></surname>
<given-names><![CDATA[Astghik]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,National Academy of Sciences of the Republic of Armenia  ]]></institution>
<addr-line><![CDATA[Yerevan ]]></addr-line>
<country>Armenia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2022</year>
</pub-date>
<volume>40</volume>
<numero>2</numero>
<fpage>311</fpage>
<lpage>315</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-99652022000200311&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-99652022000200311&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-99652022000200311&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The concentration of supplied mineral nutrients is one of the most important and limiting factors for enhancing the efficiency of plant nutrition. Optimal concentration of nutrient solutions (NS) provide plants with the necessary amount of nutrients. From this point of view, research on several physicochemical parameters that characterize concentrations of NS and uptake of nutrients by the plants remains an actual problem. The changes of electrical conductivity (EC) and total dissolved solids (TDS) depending on the concentration of biofertilizer as well as the role of biofertilizer solutions in the rooting capacity of cuttings (lateral sprouts) of Callisiafragrans are presented here. The EC and TDS of the biofertilizer-water mixture changed gradually according to the biofertilizer concentration. The biofertilizer solution was a good medium for the rooting of C. fragrans cuttings. The results could help to provide the crops with the necessary amount of mineral nutrients and regulate the suitability of irrigation during the entire vegetation period.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La concentración de los nutrientes minerales suministrados es uno de los factores más importantes y limitantes para mejorar la eficiencia nutritiva de las plantas. La concentración óptima de la disolución nutritiva (DN) proporciona a las plantas la cantidad necesaria de nutrientes. Desde este punto de vista, la investigación sobre varios parámetros fisicoquímicos que caracterizan la concentración de la DN y la absorción de nutrientes por parte de las plantas sigue siendo un problema en la actualidad. Se muestran aquí los cambios de conductividad eléctrica (CE) y de los sólidos disueltos totales (SDT) en función de la concentración del biofertilizante, así como el papel de la disolución del biofertilizante sobre la capacidad de enraiza-miento de las estacas (brotes laterales) de Callisia fragrans. Ambos parámetros CE y SDT de la mezcla biofertilizante con agua, cambian gradualmente dependiendo de la concentración del biofertilizante. La solución del biofertilizante fue un buen medio para el enraizamiento de estacas de C. fragrans. Los resultados podrían ayudar a proporcionar a los cultivos la cantidad necesaria de nutrientes y regular la idoneidad del riego durante todo el periodo vegetativo.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[electrical conductivity]]></kwd>
<kwd lng="en"><![CDATA[total dissolved solids]]></kwd>
<kwd lng="en"><![CDATA[nutrient solution]]></kwd>
<kwd lng="en"><![CDATA[sustainable agriculture]]></kwd>
<kwd lng="en"><![CDATA[hydroponics]]></kwd>
<kwd lng="en"><![CDATA[Callisia fragrans]]></kwd>
<kwd lng="es"><![CDATA[conductividad eléctrica]]></kwd>
<kwd lng="es"><![CDATA[sólidos disueltos totales]]></kwd>
<kwd lng="es"><![CDATA[solución nutritiva]]></kwd>
<kwd lng="es"><![CDATA[agricultura sustentable]]></kwd>
<kwd lng="es"><![CDATA[hidroponía]]></kwd>
<kwd lng="es"><![CDATA[Callisia fragrans]]></kwd>
</kwd-group>
</article-meta>
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