<?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>S0120-01352018000200027</article-id>
<article-id pub-id-type="doi">10.22267/rcia.183502.89</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto de la aplicación de copolímeros sobre el cultivo de lechuga ( Lactuca sativa L.)]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of the application of copolymere on lettuce (Lactuca sativa L.) crop]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Andrada]]></surname>
<given-names><![CDATA[Horacio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Di Barbaro]]></surname>
<given-names><![CDATA[Gabriela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Catamarca  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional de Catamarca  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<volume>35</volume>
<numero>2</numero>
<fpage>27</fpage>
<lpage>35</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-01352018000200027&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-01352018000200027&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-01352018000200027&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La problemática de la producción agrícola en las regiones áridas y semiáridas reside mayormente en la escasez de agua para riego y en la baja calidad de los suelos, por lo cual, es importante buscar alternativas y formas eficientes de manejo de los recursos hídricos en estas regiones en un marco de absoluta racionalidad y sustentabilidad. El objetivo de este trabajo fue evaluar la capacidad de retención hídrica del copolímero de acrilamida y acrilato de potasio, como mejorador de la implantación y crecimiento de un cultivo de lechuga (Lactuca sativaL.) bajo condiciones controladas. Se compararon dos tratamientos con dosis de 25 y 50 kg. ha-1versus un testigo de control, con el fin de determinar si el uso de dicha enmienda mejoraba la producción del cultivo. Se evalúa con la emergencia, la supervivencia, el peso fresco y seco de la parte aérea del cultivo y el contenido de humedad del suelo. Las respuestas fueron positivas para la aplicación de la enmienda en la dosis menor dado que aumentó la emergencia de plántulas, supervivencia, crecimiento y en consecuencia su rendimiento, como así también el contenido de humedad del suelo. En conclusión, la aplicación de 25 kg. ha-1del copolímero en el establecimiento del cultivo de lechuga, mejoró el crecimiento e incrementó su rendimiento.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The main problem of the agricultural production in arid and semiarid regions is mainly the scarcity of irrigation water and the low quality of the soils. Hence, it is important to find alternatives and efficient water resources management practices in these regions within a frame of absolute rationality and sustainability. The objective of this work was to assess the water retention capacity of acrilamyde copolymer and potassium acrylate and how these could improve a lettuce crop (Lactuca sativaL.) implantation and growth under controlled conditions. Two treatments with 25 and 50 kg. ha-1doses versus a control sample were compared in order to determine if the use of said amendment could improve crop production. The emergence, survival, fresh and dry weight of the aerial part of the crop and the soil humidity levels were evaluated. The answers were positive for the application of the amendment in the lower dose since the emergence of seedlings, its survival, its growth and its consequent yield raised, as well as the moisture content of the soil. In conclusion, the application of 25 kg ha-1of the copolymer in the of the lettuce crop site, improved the growth and increased its yield.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Acrilato de potasio]]></kwd>
<kwd lng="es"><![CDATA[Hidrogel]]></kwd>
<kwd lng="es"><![CDATA[Rendimiento.]]></kwd>
<kwd lng="en"><![CDATA[Potassium acrylate]]></kwd>
<kwd lng="en"><![CDATA[Hydrogel]]></kwd>
<kwd lng="en"><![CDATA[Yield.]]></kwd>
</kwd-group>
</article-meta>
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