<?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>S0871-018X2022000301001</article-id>
<article-id pub-id-type="doi">10.19084/rca.28743</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evaluación del contenido de glomalina y su relación con la agregación en suelos urbanos]]></article-title>
<article-title xml:lang="en"><![CDATA[Evaluation of glomalin content and its relationship with aggregation in urban soil]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Suárez]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herbón]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barral]]></surname>
<given-names><![CDATA[M.T.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Paradelo]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Santiago de Compostela Facultad de Farmacia Departamento de Edafología y Química Agrícola]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Spain</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>1001</fpage>
<lpage>1010</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S0871-018X2022000301001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S0871-018X2022000301001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S0871-018X2022000301001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La materia orgánica tiene un papel esencial en la agregación de las partículas de suelo y por ello en el desarrollo de una estructura estable. Entre los componentes orgánicos, se ha destacado el papel en la formación de agregados de la glomalina, una glicoproteína producida por hongos micorrícicos, cuyo contenido puede verse afectado por diversos factores, entre ellos el uso del suelo. En este trabajo se analiza el contenido de glomalina en 56 suelos urbanos de Santiago de Compostela, sobre distinto sustrato litológico y vegetación (forestal, prado y horticultura), y se evalúa su relación con la estabilidad de agregados. Las concentraciones de glomalina fácilmente extraíble varían entre 0,8 y 9,6 mg g-1(valor medio 4,8 mg g-1, 8 % de la materia orgánica del suelo), sin que se observen diferencias atribuibles a la litología o uso del suelo. No se observa relación significativa de estabilidad de agregados en agua con la glomalina, pero tampoco con otras formas de C soluble ni con C total, lo que se atribuye al elevado contenido de materia orgánica de los suelos estudiados, que superan los valores umbrales por encima de los cuales la materia orgánica ya no tiene efectos apreciables en la agregación.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Organic matter plays an essential role in the aggregation of soil particles and thus in the development of a stable structure. Among the organic components, the role of glomalin, a glycoprotein produced by mycorrhizal fungi, whose content can be affected by various factors, including land use, has been highlighted in the formation of aggregates. In this work, the content of glomalin in 56 urban soils of Santiago de Compostela is analyzed, on different lithological substrates and vegetation (forestry, grassland and horticulture), and its relationship with the stability of aggregates is evaluated. Easily extractable glomalin concentrations vary between 0.8 and 9.6 mg g-1 (mean value 4.8 mg g-1, 8 % of soil organic matter), with no differences attributable to lithology or land use. No significant relationship of stability of aggregates in water is observed with glomalin, but neither with other forms of soluble C nor with total C, which is attributed to the high organic matter content of the soils studied, which exceed the threshold values &#8203;&#8203;above of which organic matter no longer has appreciable effects on aggregation.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[estructura edáfica]]></kwd>
<kwd lng="es"><![CDATA[agregados]]></kwd>
<kwd lng="es"><![CDATA[estabilidad]]></kwd>
<kwd lng="es"><![CDATA[materia orgánica]]></kwd>
<kwd lng="es"><![CDATA[glomalina]]></kwd>
<kwd lng="en"><![CDATA[edaphic structure]]></kwd>
<kwd lng="en"><![CDATA[aggregates]]></kwd>
<kwd lng="en"><![CDATA[stability]]></kwd>
<kwd lng="en"><![CDATA[organic matter]]></kwd>
<kwd lng="en"><![CDATA[glomalin]]></kwd>
</kwd-group>
</article-meta>
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