<?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>0120-0135</journal-id>
<journal-title><![CDATA[Revista de Ciencias Agrícolas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Cienc. Agr.]]></abbrev-journal-title>
<issn>0120-0135</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Nariño]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-01352020000200004</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Research article]]></article-title>
<article-title xml:lang="es"><![CDATA[Evaluación de solubilidad del fosfato de la roca fosfórica vía Aspergillus niger y Penicillium sp]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Argotte I.]]></surname>
<given-names><![CDATA[Leandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barreiro Q.]]></surname>
<given-names><![CDATA[Oscar Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cerquera P.]]></surname>
<given-names><![CDATA[Néstor Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castro S.]]></surname>
<given-names><![CDATA[Hans Thielin]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Surcolombiana  ]]></institution>
<addr-line><![CDATA[Neiva ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Surcolombiana  ]]></institution>
<addr-line><![CDATA[Neiva ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Surcolombiana  ]]></institution>
<addr-line><![CDATA[Neiva ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Corporación Universitaria del Huila &#8220;CORHUILA&#8221;  ]]></institution>
<addr-line><![CDATA[Neiva ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<volume>37</volume>
<numero>2</numero>
<fpage>4</fpage>
<lpage>13</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-01352020000200004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-01352020000200004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-01352020000200004&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Phosphoric rock is the main source of phosphorus used in fertilizers. In most cases, it is applied alone or mixed with other nutrients in water; however, its low solubility means that it is not used efficiently, causing excess phosphorus to be wasted. As a result, it generates economic expenses to the farmer, or causing problems of eutrophication in water sources. In this article, different mixtures of solubilizing fungi with coffee pulp stillage were studied to improve phosphates&#8217; solubility in phosphate rock. Despite that in different studies is clear the fungi&#8217;s role in P solubilization, its application on soils is still made without any additional treatment. Phosphoric rock samples were obtained from the municipality of Aipe (Huila) and were treated for 6 weeks with coffee pulp stillage (Coffea arabica) and inoculums of Aspergillus niger and Penicillium sp, pH and temperature controlled. The fungus species were obtained from environmental media on PDA culture, then it was isolated and identified on MEA culture according to standard morphologic identification methods. Aspergillus niger showed greater mycelial growth in the stillage and a higher concentration of phosphates dissolved in the aqueous phase (72 ( 31 M) compared to Penicillium sp. The mixture of the two fungi in the treatments allowed to obtain the highest percentage of phosphates (17.8% of the phosphate soluble in H2SO4 40% v / v).]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La roca fosfórica es la principal fuente de fósforo usada en los fertilizantes. En la mayoría de los casos, se aplica sola o mezclada con otros nutrientes en agua; sin embargo, su baja solubilidad no permite su total aprovechamiento, haciendo que el exceso de fósforo se desaproveche, genere gastos económicos para al agricultor o produzca problemas de eutrofización en fuentes de agua. En este artículo se estudiaron diferentes mezclas de hongos solubilizadores (MSP) con vinaza de pulpa de café para mejorar la solubilidad de los fosfatos de la roca fosfórica, ya que a pesar de que en diferentes estudios se ha evidenciado su rol en la solubilización de P, su aplicación en suelos se sigue haciendo sin ningún tratamiento adicional. Las muestras de roca fosfórica fueron obtenidas del municipio de Aipe (Huila) y se trataron durante seis semanas con vinazas de pulpa de café (Coffea arábiga L.) e inóculos de Aspergillus niger y Penicillium sp, pH y temperatura controlados. Los hongos fueron obtenidos en Agar Papa Dextrosa (PDA), y aislados e identificados en Agar Extracto de Malta (MEA) de acuerdo con métodos estándar de identificación morfológica. El Aspergillus niger mostró mayor crecimiento micelial en las vinazas y obtuvo una mayor concentración de fosfatos disueltos en fase acuosa (72 ( 31 M) en comparación con Penicillium sp. La mezcla de los dos hongos en los tratamientos permitió obtener el mayor porcentaje de fosfatos (17,8% del fosfato soluble en H2SO4 40%v/v).]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[sustainable agriculture]]></kwd>
<kwd lng="en"><![CDATA[land resources]]></kwd>
<kwd lng="en"><![CDATA[liquid fertilizers]]></kwd>
<kwd lng="en"><![CDATA[Phosphate solubilizing microorganisms]]></kwd>
<kwd lng="en"><![CDATA[fungi.]]></kwd>
<kwd lng="es"><![CDATA[Agricultura sostenible]]></kwd>
<kwd lng="es"><![CDATA[recurso suelo]]></kwd>
<kwd lng="es"><![CDATA[fertilizantes líquidos, microorganismos solubilizadores de fosfatos]]></kwd>
<kwd lng="es"><![CDATA[hongos]]></kwd>
</kwd-group>
</article-meta>
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