<?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>0123-3475</journal-id>
<journal-title><![CDATA[Revista Colombiana de Biotecnología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. colomb. biotecnol]]></abbrev-journal-title>
<issn>0123-3475</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Biotecnología, Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0123-34752020000100087</article-id>
<article-id pub-id-type="doi">10.15446/rev.colomb.biote.v22n1.78019</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evaluación de fijadores biológicos de nitrógeno libres sobre el crecimiento de gramíneas en suelo degradado]]></article-title>
<article-title xml:lang="en"><![CDATA[Evaluation of free nitrogen biological fixers on the growth of grasses on degraded soil]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ariza Rodríguez]]></surname>
<given-names><![CDATA[Sebastián]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González Murillo]]></surname>
<given-names><![CDATA[Octavio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López Sánchez]]></surname>
<given-names><![CDATA[Jacqueline]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Medellín  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional de Colombia  ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Antioquia  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<volume>22</volume>
<numero>1</numero>
<fpage>87</fpage>
<lpage>97</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0123-34752020000100087&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0123-34752020000100087&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0123-34752020000100087&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Los problemas de degradación del suelo que se presentan actualmente permiten que los fijadores biológicos de nitrógeno libre (FBNL), tengan potencial como microorganismos regeneradores de este recurso. Con el objetivo de evaluar su capacidad como grupo funcional, se buscó el aislamiento en medios selectivos Ashby y FBN. Luego de su caracterización morfológica y bioquímica; se inocularon dos tipos de semillas, Zea mays y Brachiaria decumbens; sembradas en un suelo degradado (predio La Ortega de la Universidad de Medellín). Se realizaron 4 tratamientos con 5 repeticiones, durante 36 días en invernadero. Los resultados más destacados los presentó la Brachiaria decumbens al incrementar el peso seco y la longitud de sus raíces gracias a un aislado FBNL (AshAssm4); lo que sugiere su potencial utilización para mejorar los procesos de revegetalización.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Due to the problems of soil degradation that currently occur, the free nitrogen biological fixers (FNBF), have potential as regenerating microorganisms of this resource. With the objective of evaluating its capacity as a functional group, isolation was sought in selective media Ashby and FBN; after its morphological and biochemical characterization; two types of seeds were inoculated, Zea mays and Brachiaria decumbens; planted in degraded soil (La Ortega property of the Universidad de Medellín). Four treatments were performed with 5 repetitions, during 36 days in the greenhouse. The most outstanding results are those described by Brachiaria decumbens by increasing the dry weight and the length of its roots thanks to a FNBF isolate (AshAssm4); which suggests its potential use to improve revegetalization processes.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Calidad del suelo]]></kwd>
<kwd lng="es"><![CDATA[Fijación de nitrógeno]]></kwd>
<kwd lng="es"><![CDATA[Crecimiento vegetal]]></kwd>
<kwd lng="en"><![CDATA[Soil quality]]></kwd>
<kwd lng="en"><![CDATA[Nitrogen fixation]]></kwd>
<kwd lng="en"><![CDATA[Plant Growth]]></kwd>
</kwd-group>
</article-meta>
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