<?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>0871-018X</journal-id>
<journal-title><![CDATA[Revista de Ciências Agrárias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. de Ciências Agrárias]]></abbrev-journal-title>
<issn>0871-018X</issn>
<publisher>
<publisher-name><![CDATA[Sociedade de Ciências Agrárias de Portugal]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0871-018X2022000100011</article-id>
<article-id pub-id-type="doi">10.19084/rca.19451</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Formas de P em Latossolo Vermelho-Amarelo sob pastagem após dois e sete anos da adubação fosfatada]]></article-title>
<article-title xml:lang="en"><![CDATA[P forms in Oxisol soil under pasture after two and seven years of phosphate fertilization]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Selhorst]]></surname>
<given-names><![CDATA[Bianca Souza]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Schlindwein]]></surname>
<given-names><![CDATA[Jairo André]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Marcolan]]></surname>
<given-names><![CDATA[Alaerto Luiz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pansonato]]></surname>
<given-names><![CDATA[Bianca da Silva]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valois]]></surname>
<given-names><![CDATA[Caroline Alexandra da Silva]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Fundação Universidade Federal de Rondônia  ]]></institution>
<addr-line><![CDATA[Porto Velho Rondônia]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Embrapa Rondônia  ]]></institution>
<addr-line><![CDATA[Porto Velho Rondônia]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>30</day>
<month>06</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>30</day>
<month>06</month>
<year>2022</year>
</pub-date>
<volume>45</volume>
<numero>1-2</numero>
<fpage>11</fpage>
<lpage>20</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S0871-018X2022000100011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S0871-018X2022000100011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S0871-018X2022000100011&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[RESUMO Em solos mais intemperizados como os Latossolos, o uso de adubações fosfatadas, pode garantir a maior disponibilidade de fósforo para as plantas. Esse estudo teve por objetivo avaliar as formas de fósforo no solo Latossolo Vermelho-Amarelo sob pastagem após dois e sete anos a aplicação de doses de superfosfato simples. Os tratamentos eram compostos por cinco doses de superfosfato simples, aplicados e mantidos em superfície na implantação do experimento de pastagem Brachiaria brizantha cv. Marandu no ano de 2010. As amostras de solos foram coletadas nas camadas de 0-10 e 10-20 cm após dois (2012) e sete anos (2017) da adubação fosfatada, e submetidas a um fracionamento químico para a determinação das formas de fósforo no solo. Após dois anos da adubação fosfatada, houve aumento nos teores de fósforo em formas orgânicas, inorgânicas e nas frações lábeis, moderadamente lábeis e não-lábeis, em função das doses de fósforo, sendo mais expressivo na camada 0-10 cm do solo. Sete anos após, há predominância do fósforo em fração não-lábil, sendo os teores de fósforo em forma orgânica e inorgânica e as frações de fósforo lábil e moderadamente lábil não influenciadas pela adubação.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT In more weathered soils such as Oxisols, the use of phosphate fertilizers can ensure higher availability of phosphorus to plants. This study aimed to evaluate the forms of phosphorus in the Oxisol soil under pasture after two and seven years of applying simple superphosphate doses. The treatments consisted of five doses of simple superphosphate, applied and maintained on the surface of the Brachiaria brizantha cv. Marandu in 2010. Soil samples were collected in the 0-10 and 10-20 cm layers after two (2012) and seven years (2017) of phosphate fertilization, and submitted to chemical fractionation to determine phosphorus forms in the soil. After two years of phosphate fertilization, there was an effect of doses on phosphorus levels in organic, inorganic forms and labile, moderately labile and no-labile fractions, with an increase in their contents as a function of phosphorus doses, being more expressive in layer 0 -10 cm from the ground. Seven years later, there is a predominance of phosphorus in no-labile fraction, being the phosphorus contents in organic and inorganic form and the labile and moderately labile phosphorus fractions were not influenced by fertilization.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[labilidade]]></kwd>
<kwd lng="pt"><![CDATA[fracionamento]]></kwd>
<kwd lng="pt"><![CDATA[Brachiaria brizantha]]></kwd>
<kwd lng="en"><![CDATA[lability]]></kwd>
<kwd lng="en"><![CDATA[fractionation]]></kwd>
<kwd lng="en"><![CDATA[Brachiaria brizantha]]></kwd>
</kwd-group>
</article-meta>
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