<?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>0012-7353</journal-id>
<journal-title><![CDATA[DYNA]]></journal-title>
<abbrev-journal-title><![CDATA[Dyna rev.fac.nac.minas]]></abbrev-journal-title>
<issn>0012-7353</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0012-73532021000200097</article-id>
<article-id pub-id-type="doi">10.15446/dyna.v88n217.91019</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Quantification of water erosion and characterization of surface sealing in Ultisols in semiarid areas in Brazil]]></article-title>
<article-title xml:lang="es"><![CDATA[Cuantificación de la erosión hídrica y caracterización del sellado superficial en Ultisoles en áreas semiáridas en Brasil]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[de Moraes Rodrigues]]></surname>
<given-names><![CDATA[Joez André]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Souza]]></surname>
<given-names><![CDATA[Thais Emanuelle Monteiro dos Santos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Souza]]></surname>
<given-names><![CDATA[Edivan Rodrigues de]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Corrêa]]></surname>
<given-names><![CDATA[Marcelo Metri]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Almeida]]></surname>
<given-names><![CDATA[Brivaldo Gomes de]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguiar]]></surname>
<given-names><![CDATA[Irivânia Fidelis da Silva]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Federal Rural University of Pernambuco Department of Agricultural Engineering ]]></institution>
<addr-line><![CDATA[Recife PE]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Federal University of Pernambuco Department of Biophisics and Radiology ]]></institution>
<addr-line><![CDATA[Recife PE]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Federal University of Agreste of Pernambuco Department of Agromony ]]></institution>
<addr-line><![CDATA[Garanhuns PE]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Federal Rural University of Pernambuco Department of Agonomy ]]></institution>
<addr-line><![CDATA[Recife PE]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Federal University of Pernambuco Department of Biochemistry and Biophysicsv ]]></institution>
<addr-line><![CDATA[Recife PE]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<volume>88</volume>
<numero>217</numero>
<fpage>97</fpage>
<lpage>102</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0012-73532021000200097&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0012-73532021000200097&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0012-73532021000200097&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The lack of cover is one of the main accelerators of soil degradation. Without protection and exposed to rainfall, the soil breaks the particles, causing surface sealing, making infiltration difficult. This study characterizes surface sealing and hydraulic erosion in Ultisols of the Alto Ipanema Basin. Eight erosion plots were established under the treatments: bare soil and soil with Brachiaria decumbens mulch. Three rain events were simulated at 24-hour intervals, with an intensity of 54.63 mmh-1. After each simulation, the surface micromorphology and the amount of soil lost were investigated. The use of mulch reduced runoff by 42% and the loss of soil and the rate of disaggregation was reduced by 70% on average. Infiltration was increased by 242%. Mulch was effective in preserving soil porosity and microstructure for the first simulated rainfall event (0 h), but was not observed in the second (24 h) and third (48 h) rainfall events.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La falta de cobertura es uno de los principales aceleradores de la degradación del suelo. Sin protección y expuesto a la lluvia, el suelo rompe las partículas, provocando el sellado de la superficie, dificultando la infiltración. Este estudio caracteriza el sellado superficial y la erosión hidráulica en Ultisoles de la Cuenca del Alto Ipanema. Se establecieron ocho parcelas de erosión bajo los tratamientos: suelo desnudo y suelo con mantillo de Brachiaria decumbens. Se simularon tres eventos de lluvia a intervalos de 24 horas, con una intensidad de 54,63 mmh-1. Después de cada simulación, se investigó la micromorfología de la superficie y la cantidad de suelo perdido. El uso de mantillo redujo la escorrentía en un 42% y la pérdida de suelo y la tasa de desagregación se redujo en un 70% en promedio. La infiltración se incrementó en un 242%. El mantillo fue eficaz para preservar la porosidad y la microestructura del suelo para el primer evento de lluvia simulado (0 h), pero no se observó en el segundo (24 h) y tercero (48 h) eventos de lluvia.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[conservation practices]]></kwd>
<kwd lng="en"><![CDATA[soil loss]]></kwd>
<kwd lng="en"><![CDATA[simulated rainfall event]]></kwd>
<kwd lng="en"><![CDATA[soil micromorphology]]></kwd>
<kwd lng="es"><![CDATA[prácticas de conservación]]></kwd>
<kwd lng="es"><![CDATA[pérdida de suelo]]></kwd>
<kwd lng="es"><![CDATA[evento de lluvia simulado]]></kwd>
<kwd lng="es"><![CDATA[micromorfología del suelo]]></kwd>
</kwd-group>
</article-meta>
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