<?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>S0871-018X2022000301161</article-id>
<article-id pub-id-type="doi">10.19084/rca.28764</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Evolução da salinidade do solo no perímetro de rega do Roxo]]></article-title>
<article-title xml:lang="en"><![CDATA[Evolution of soil salinity in Roxo&#8217;s irrigation district]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gonçalves]]></surname>
<given-names><![CDATA[M.C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castanheira]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Farzamian]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Paz]]></surname>
<given-names><![CDATA[A.M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramos]]></surname>
<given-names><![CDATA[T.B.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alexandre]]></surname>
<given-names><![CDATA[C.]]></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[,Universidade de Lisboa Instituto Superior Técnico Centro de Ciência e Tecnologia do Ambiente e do Mar]]></institution>
<addr-line><![CDATA[Lisboa ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidade de Évora Dept. de Geociências e MED ]]></institution>
<addr-line><![CDATA[Évora ]]></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>1161</fpage>
<lpage>1170</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S0871-018X2022000301161&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S0871-018X2022000301161&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S0871-018X2022000301161&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo Avaliou-se a evolução da salinidade do solo, em diferentes solos e culturas regadas, no perímetro de rega do Roxo. Selecionaram-se dez locais, com amendoal, olival, citrinos e romãs instalados em solos AL, LV, RG, PL e VR (WRB 2014). As culturas estudadas apresentavam tolerâncias diferentes à salinidade do solo. As campanhas de monitorização decorreram de maio de 2019 a maio de 2021. Colheram-se amostras de solo num máximo até 80 cm de profundidade, onde se determinou a condutividade elétrica do extrato de saturação do solo (ECe). A condutividade elétrica média da água de rega foi de 0,72 e de 0,66 dS/m em 2019/2020 e em 2021, respetivamente. A salinidade variou ao longo do tempo, mas sem atingir valores preocupantes para as culturas. Nas culturas sensíveis à salinidade (amendoal e citrinos), verificaram-se situações pontuais em que ECe em determinadas profundidades apresentava valores superiores ao limite de tolerância. No final dos ensaios, o solo apresentava valores de ECe muito próximos, ou mesmo inferiores, aos valores iniciais. Além da qualidade da água do Roxo indicar uma melhoria em relação a estudos anteriores, a precipitação ocorrida nos anos de 2019 a 2021 também contribuíu para a remoção de sais eventualmente acumulados.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Soil salinity was evaluated, in different soils and irrigated crops, in Roxo&#8217;s irrigation district from May 2019 to May 2021. Ten experimental sites were selected, with almond groves, olive groves, citrus and pomegranates installed on AL, LV, RG, PL and VR soils (WRB 2014). The studied cultures had different tolerances to soil salinity. Soil samples were taken at different depths, from the soil surface to a maximum depth of 80 cm, and the electrical conductivity of the soil saturation paste extract (ECe) was measured. The average electrical conductivity of irrigation water was 0.72 and 0.66 dS/m in 2019/2020 and 2021, respectively. The salinity varied over time, but without reaching values of concern. In salinity-sensitive crops (almond and citrus), there were occasional situations in which ECe presented values above the tolerance limit at certain depths. At the end of the monitoring period, the ECe values were very close or even lower than the initial ones. In addition to the quality of the Roxo water indicating an improvement compared to previous studies, the precipitation that occurred from 2019 to 2021 also contributed to the removal of salts that eventually accumulated in the rootzone of the soil profile.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[monitorização]]></kwd>
<kwd lng="pt"><![CDATA[salinidade do solo]]></kwd>
<kwd lng="pt"><![CDATA[condutividade elétrica do extracto de saturação]]></kwd>
<kwd lng="pt"><![CDATA[tolerância à salinidade]]></kwd>
<kwd lng="pt"><![CDATA[lixiviação]]></kwd>
<kwd lng="en"><![CDATA[monitoring]]></kwd>
<kwd lng="en"><![CDATA[soil salinity]]></kwd>
<kwd lng="en"><![CDATA[electrical conductivity of the soil saturation paste extract, crop tolerance, leaching]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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