<?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>S0871-018X2022000300691</article-id>
<article-id pub-id-type="doi">10.19084/rca.28573</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Cover crops for the improvement of soil microbiological properties in intensive horticultural production systems]]></article-title>
<article-title xml:lang="pt"><![CDATA[Culturas de cobertura para a melhoria das propriedades microbiológicas do solo em sistemas de produção hortícola intensiva]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fareleira]]></surname>
<given-names><![CDATA[Paula]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castro]]></surname>
<given-names><![CDATA[Isabel Videira]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Soares]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Matos]]></surname>
<given-names><![CDATA[Susete]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Almeida]]></surname>
<given-names><![CDATA[Lurdes]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barradas]]></surname>
<given-names><![CDATA[Ana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Nunes]]></surname>
<given-names><![CDATA[Ana Paula]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Investigação Agrária e Veterinária  ]]></institution>
<addr-line><![CDATA[Oeiras ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,AgroMais Entreposto Comercial Agrícola ]]></institution>
<addr-line><![CDATA[Riachos ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Torriba Organização de Produtores de Hortofrutícolas, S.A. ]]></institution>
<addr-line><![CDATA[Raposa ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Fertiprado - Sementes e Nutrientes Lda  ]]></institution>
<addr-line><![CDATA[Vaiamonte ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Centro Operativo e Tecnológico Hortofrutícola Nacional Centro de Competências ]]></institution>
<addr-line><![CDATA[Alcobaça ]]></addr-line>
<country>Portugal</country>
</aff>
<pub-date pub-type="pub">
<day>30</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>30</day>
<month>12</month>
<year>2022</year>
</pub-date>
<volume>45</volume>
<numero>4</numero>
<fpage>691</fpage>
<lpage>700</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S0871-018X2022000300691&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S0871-018X2022000300691&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S0871-018X2022000300691&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The production of horto-industrial crops in the Portuguese region of Ribatejo is based on monoculture systems with high technical intervention, which results in soil biodiversity imbalances, loss of fertility and progressive degradation. In these systems, the introduction of cover crops preceding the main crop of the agricultural year can contribute to improving the soil status and the sustainability of the production systems. The present work describes the evaluation of soil microbiological indicators in two field trials in Ribatejo, where different cover crops were installed: biodiverse mixture of legumes and grasses, including clovers inoculated with rhizobia; annual ryegrass (Lolium multiflorum); and forage turnip (Raphanus sativus) for biofumigation. Control plots without cover crops were maintained in both fields. The evaluations focused on soil enzymatic activities (dehydrogenase, alkaline phosphatase and &#946;-glucosidase) and several groups of microorganisms, including total bacteria, symbiotic nitrogen-fixing bacteria (rhizobia), free-living nitrogen-fixing bacteria, phosphate-solubilizing bacteria and phytostimulating microorganisms. The results indicated a tendency for the increase of soil microbiological activity and beneficial microorganisms with cover crops, especially with the biodiverse mixture of legumes and grasses and annual ryegrass.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo A produção de culturas hortoindustriais na região do Ribatejo assenta em sistemas de monocultura com elevada intervenção fitotécnica, o que resulta em desequilíbrios de biodiversidade, perda de fertilidade e degradação progressiva dos solos. Nestes sistemas, a introdução de culturas de cobertura no período que antecede a cultura principal do ano agrícola pode contribuir para melhorar o estado do solo e a sustentabilidade da produção. O presente trabalho descreve a avaliação de indicadores microbiológicos do solo em dois campos piloto no Ribatejo, onde foram instaladas diferentes culturas de cobertura: mistura biodiversa de leguminosas e gramíneas, incluindo trevos inoculados com rizóbios; azevém anual (Lolium multiflorum); e nabo forrageiro (Raphanus sativus) para biofumigação. Em ambos os campos foram mantidos talhões-controlo, sem culturas de cobertura. As avaliações incidiram sobre atividades enzimáticas do solo (desidrogenase, fosfatase alcalina e &#946;-glucosidase) e vários grupos de microrganismos, incluindo bactérias totais, bactérias fixadoras de azoto simbióticas (rizóbios), bactérias fixadoras de azoto de vida livre, bactérias solubilizadoras de fosfato e microrganismos fitoestimulantes. Os resultados indicaram uma tendência para o aumento da atividade microbiológica do solo e de microrganismos benéficos com as culturas de cobertura, em especial com a mistura biodiversa de leguminosas e gramíneas e com azevém anual.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Cover crops]]></kwd>
<kwd lng="en"><![CDATA[Soil microbiological indicators]]></kwd>
<kwd lng="en"><![CDATA[Soil enzyme activities]]></kwd>
<kwd lng="en"><![CDATA[Plant-beneficial microorganisms]]></kwd>
<kwd lng="pt"><![CDATA[Culturas de cobertura]]></kwd>
<kwd lng="pt"><![CDATA[Indicadores microbiológicos do solo]]></kwd>
<kwd lng="pt"><![CDATA[Atividades enzimáticas do solo]]></kwd>
<kwd lng="pt"><![CDATA[Microrganismos benéficos para as plantas]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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