<?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>S0120-28122017000100042</article-id>
<article-id pub-id-type="doi">10.15446/acag.v66n1.53420</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Effect of nitrogen fertilization on productivity and quality of Mombasa forage (Megathyrsus maximum cv. Mombasa)]]></article-title>
<article-title xml:lang="pt"><![CDATA[Adubação nitrogenada na produtividade e qualidade do capim Mombaça (Megathyrsus maximum cv. Mombaça)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Munari-Escarela]]></surname>
<given-names><![CDATA[Carolina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pietroski]]></surname>
<given-names><![CDATA[Marizane]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mello-Prado]]></surname>
<given-names><![CDATA[Renato de]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silva-Campos*]]></surname>
<given-names><![CDATA[Cid Naudi]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Caione]]></surname>
<given-names><![CDATA[Gustavo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade Estadual Paulista Faculdade de Ciências Agrárias e Veterinárias (FCAV/UNESP) ]]></institution>
<addr-line><![CDATA[Jaboticabal SP]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade do Estado de Mato Grosso Câmpus Universitário de Alta Floresta ]]></institution>
<addr-line><![CDATA[Alta Floresta MT]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidade Estadual Paulista Faculdade de Ciências Agrárias e Veterinárias (FCAV/UNESP) Departamento de solos e adubos]]></institution>
<addr-line><![CDATA[Jaboticabal SP]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidade Federal de Mato Grosso do Sul  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2017</year>
</pub-date>
<volume>66</volume>
<numero>1</numero>
<fpage>42</fpage>
<lpage>48</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-28122017000100042&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-28122017000100042&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-28122017000100042&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Mombasa grass is very demanding and responsive to soil fertility. The objective of the present study was to evaluate forage production and the correlation among crude protein and the green color index of leaves of Megathyrsus maximum cultivar Mombasa in function of nitrogen levels. The study was conducted using 5 dm-3 pots in a greenhouse at the Universidade Estadual Paulista - UNESP, Jaboticabal, São Paulo. The experimental design consisted of randomized blocks with five treatments and four replications. Treatments were nitrogen rates (0, 62.5, 125, 250 and 500 mg dm-3 of N), corresponding to 0, 125, 250, 500 and 1000 kg ha-1 of N. We evaluated the production of grass dry matter, the green color index, the accumulation of nitrogen and crude protein content in the shoot. Nitrogen fertilization increased forage production, crude protein, nitrogen accumulation and green color index of Mombasa grass. There is high correlation of the green color index with the crude protein content.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo O capim Mombaça é muito exigente e responsivo em fertilidade do solo. Objetivou-se avaliar a produção de forragem e a correlação entre a proteína bruta com o índice da cor verde da folha de Megathyrsus maximum cultivar Mombaça, em função de doses de nitrogênio. O estudo foi realizado em vasos de 5 dm³ conduzido em casa de vegetação na Universidade Estadual Paulista - UNESP, Jaboticabal, São Paulo. Utilizou-se o delineamento experimental de blocos inteiramente casualizados com cinco tratamentos e quatro repetições. Os tratamentos foram constituídos por doses de nitrogênio (0, 62,5, 125, 250 e 500 mg dm-3 de N), correspondentes a 0, 125, 250, 500 e 1.000 kg ha-1 de N. Foram avaliados a produção de matéria seca do capim, o índice da cor verde, o acúmulo de nitrogênio e o teor de proteína bruta na parte aérea. A adubação nitrogenada aumentou a produção de forragem, teor de proteína bruta, acúmulo de nitrogênio e índice da cor verde no capim Mombaça. Existe alta correlação do índice da cor verde com o teor de proteína bruta.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Chlorophyll]]></kwd>
<kwd lng="en"><![CDATA[forage]]></kwd>
<kwd lng="en"><![CDATA[plant nutrition]]></kwd>
<kwd lng="en"><![CDATA[protein]]></kwd>
<kwd lng="en"><![CDATA[urea]]></kwd>
<kwd lng="pt"><![CDATA[Clorofilômetro]]></kwd>
<kwd lng="pt"><![CDATA[forragem]]></kwd>
<kwd lng="pt"><![CDATA[nutrição de plantas]]></kwd>
<kwd lng="pt"><![CDATA[proteína]]></kwd>
<kwd lng="pt"><![CDATA[ureia]]></kwd>
</kwd-group>
</article-meta>
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