<?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>2007-0934</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias agrícolas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Cienc. Agríc]]></abbrev-journal-title>
<issn>2007-0934</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-09342021000500765</article-id>
<article-id pub-id-type="doi">10.29312/remexca.v12i5.2700</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Ultrasonido de baja frecuencia como potenciador para el proceso de germinación de Stizolobium pruriens]]></article-title>
<article-title xml:lang="en"><![CDATA[Low frequency ultrasound as an enhancer for the germination process of Stizolobium pruriens]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Felizardo]]></surname>
<given-names><![CDATA[Lucas Menezes]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Prates]]></surname>
<given-names><![CDATA[Adrielle Rodrigues]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Oliverio]]></surname>
<given-names><![CDATA[Gabriela Lozano]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Maltoni]]></surname>
<given-names><![CDATA[Kátia Luciene]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lopes]]></surname>
<given-names><![CDATA[Beatriz Garcia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Faria]]></surname>
<given-names><![CDATA[Glaucia Amorim]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Estatal de São Paulo &#8220;Júlio de Mesquita Filho&#8221; Departamento de Sanidad Vegetal, Ingeniería Rural y Suelos ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de São Paulo Departamento de Ciencias Exactas ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidade Estadual Paulista &#8216;Júlio de Mesquita Filho&#8217; Departamento de Matemática ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brasil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2021</year>
</pub-date>
<volume>12</volume>
<numero>5</numero>
<fpage>765</fpage>
<lpage>776</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342021000500765&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342021000500765&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342021000500765&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La mucuna (Stizolobium pruriens) se usa ampliamente en agricultura como abono verde y en rotación de cultivos, debido a su capacidad para fijar nitrógeno y recuperar áreas degradadas; sin embargo, tiene una germinación lenta y desigual. Este estudio utilizó algunos métodos clásicos, junto con el uso de ultrasonidos de baja frecuencia para acelerar y homogeneizar la germinación y emergencia de las semillas. El experimento se realizó en el Laboratorio de Cultivo de Tejidos Vegetales del campus Ilha Solteira, São Paulo, Brasil. El diseño utilizado fue un completamente al azar, con cinco repeticiones, en un esquema factorial 3x6, siendo los factores: tres pre-tratamientos para ruptura de la latencia: escarificación mecánica, térmica, y sin escarificación con seis niveles de exposición a ultrasonido: 0, 1, 2, 3, 5, 8 min, totalizando 18 tratamientos. Durante ocho días se controló la germinación y las etapas iniciales de las plántulas. El método sin escarificación sometido a 4.5 min de ultrasonido puede convertirse en una excelente alternativa, ya que presentó mayor vigor de germinación, mientras que 3.14 min de exposición a ultrasonido fueron suficientes para mejorar la velocidad de emergencia, independientemente del método utilizado en la preparación de semillas. En conclusión, solo con el uso de ultrasonidos de baja frecuencia es posible mejorar tanto el índice de velocidad de germinación como el vigor de germinación, sin necesidad de tratamientos adicionales.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Mucuna (Stizolobium pruriens) is widely used in agriculture as a green allowance and in crop rotation, due to its ability to fix nitrogen and recover degraded areas; without embargo, there is a slow and uneven germination. This study used some classical methods, together with the use of low-frequency ultrasound to accelerate and homogenize the germination and emergence of the seeds. The experiment was carried out at the Plant Tissue Cultivation Laboratory of the Ilha Solteira Campus, São Paulo, Brazil. The design used was a completely randomized one, with five replications, in a 3x6 factorial scheme, the factors being: three pre-treatments for latency break: mechanical scarification, thermal scarification, and without scarification with six levels of ultrasound exposure: 0, 1, 2, 3, 5, 8 min, totaling 18 treatments. For eight days the germination and the initial stages of the seedlings were controlled. The method without scarification subjected to 4.5 min of ultrasound can become an excellent alternative, since it presented greater germination vigor, while 3.14 min of exposure to ultrasound were enough to improve the emergence speed, regardless of the method used in the preparation of seeds. In conclusion, only with the use of low-frequency ultrasound, it is possible to improve both the germination speed index and the germination vigor, without the need for additional treatments.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[escarificación mecánica]]></kwd>
<kwd lng="es"><![CDATA[escarificación térmica]]></kwd>
<kwd lng="es"><![CDATA[ondas ultrasónicas]]></kwd>
<kwd lng="en"><![CDATA[mechanical scarification]]></kwd>
<kwd lng="en"><![CDATA[thermal scarification]]></kwd>
<kwd lng="en"><![CDATA[ultrasonic]]></kwd>
</kwd-group>
</article-meta>
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