<?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>S0871-018X2020000100159</article-id>
<article-id pub-id-type="doi">10.19084/rca.18391</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Decomposition and nutrient release from cover crop residues under a pear orchard]]></article-title>
<article-title xml:lang="pt"><![CDATA[Decomposição e libertação de nutrientes de resíduos de culturas herbáceas num pomar de pereiras]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salume]]></surname>
<given-names><![CDATA[Jamilli]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Oliveira]]></surname>
<given-names><![CDATA[Rodolfo Assis de]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sete]]></surname>
<given-names><![CDATA[Paula]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ciotta]]></surname>
<given-names><![CDATA[Marlise]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Soares]]></surname>
<given-names><![CDATA[Claudio Roberto Fonseca Sousa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Loss]]></surname>
<given-names><![CDATA[Arcângelo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carranca]]></surname>
<given-names><![CDATA[Corina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Giacomini]]></surname>
<given-names><![CDATA[Sandro José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Boitt]]></surname>
<given-names><![CDATA[Gustavo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Brunetto]]></surname>
<given-names><![CDATA[Gustavo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade Federal de Santa Catarina Centro de Ciências Agrárias ]]></institution>
<addr-line><![CDATA[Florianópolis Santa Catarina]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina Estação Experimental de Lages ]]></institution>
<addr-line><![CDATA[Lages Santa Catarina]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Nacional de Investigação Agrária e Veterinária  ]]></institution>
<addr-line><![CDATA[Nova Oeiras ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidade Federal de Santa Maria Departamento de Solos Centro de Ciências Rurais]]></institution>
<addr-line><![CDATA[Santa Maria Rio Grande do Sul]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<volume>43</volume>
<numero>1</numero>
<fpage>159</fpage>
<lpage>174</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S0871-018X2020000100159&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S0871-018X2020000100159&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S0871-018X2020000100159&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Our objective was to evaluate the dynamics of decomposition of crop residues in a pear orchard in Brazil. Residues of oat, oilseed radish, ryegrass and spontaneous vegetation were placed in litter bags and deposited at surface soil in the inter-row spacing of pear trees. After 0, 21, 36, 56 and 136 days, the dry matter, carbon, lignin, cellulose, non-structural components, and nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), and magnesium (Mg) concentrations were determined. Spontaneous vegetation residues had the longest half residence time compared to the introduced cover crops, while oat residues presented faster dry matter decomposition rates (2-3 fold higher). Oilseed radish and ryegrass showed the highest final remaining dry matter (26-36%), and the largest nutrients release. Oilseed radish and ryegrass residues released 85 kg N ha-1, 67 kg P ha-1, 48 kg K ha-1, 16 kg Ca ha-1, and 9 kg Mg ha-1. Oilseed radish can potentially benefit mineral nutrition of fruit trees, whereas the spontaneous vegetation is recommended to protect the soil agains the erosion and to contribute to the soil organic carbon stock in the long term.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[RESUMO O objetivo do estudo foi avaliara dinâmica de decomposição de resíduos de culturas num pomar de pereiras no Brasil. Resíduos de aveia, nabo forrageiro, azevém e vegetação espontânea foram adicionados em sacos de decomposição depositados à superfície do solo nas linhas de cultivo das pereiras. Após 0, 21, 36, 56 e 136 dias, a matéria seca e os teores de carbono, lignina, celulose, componentes não estruturais e nitrogênio (N), fósforo (P), potássio (K), cálcio (Ca) e magnésio (Mg) foram determinados. Os resíduos de vegetação espontânea apresentaram o maior tempo de semi-vida em comparação com as culturas de cobertura cultivadas, enquanto os resíduos de aveia apresentaram as taxas de decomposição da matéria seca mais rápidas (2-3 vezes maior). O nabo forrageiro e o azevém apresentaram os maiores teores de matéria seca remanescente (26-36%) e a maior liberação de nutrientes. Os resíduos de nabo forrageiro e azevém liberaram 85 kg N ha-1, 67 kg P ha-1, 48 kg K ha-1, 16 kg Ca ha-1 e 9 kg Mg ha-1. O nabo forrageiro poderá beneficiar a nutrição mineral de fruteiras, enquanto a vegetação espontânea poderá contribuir para proteger o solo da erosão e para aumentar o teor de carbono orgânico acumulado no solo num longo prazo.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[decomposition rate]]></kwd>
<kwd lng="en"><![CDATA[litter bags]]></kwd>
<kwd lng="en"><![CDATA[nutrient release]]></kwd>
<kwd lng="en"><![CDATA[Pyrus communis L.cv. Rocha.]]></kwd>
<kwd lng="pt"><![CDATA[taxa de decomposição]]></kwd>
<kwd lng="pt"><![CDATA[bolsas de decomposição]]></kwd>
<kwd lng="pt"><![CDATA[liberação de nutrientes]]></kwd>
<kwd lng="pt"><![CDATA[Pyrus communis L.cv. Rocha]]></kwd>
</kwd-group>
</article-meta>
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