<?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>2664-0902</journal-id>
<journal-title><![CDATA[Alfa Revista de Investigación en Ciencias Agronómicas y Veterinaria]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Inv. Cs. Agro. y Vet.]]></abbrev-journal-title>
<issn>2664-0902</issn>
<publisher>
<publisher-name><![CDATA[CET-BOLIVIA]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2664-09022024000100020</article-id>
<article-id pub-id-type="doi">10.33996/revistaalfa.v8i22.244</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Glifosato y fertilizantes nitrogenados para controlar Sorghum halepense (L.) Pers. en dos épocas]]></article-title>
<article-title xml:lang="en"><![CDATA[Glyphosate and nitrogen fertilizers to control Sorghum halepense (L.) Pers. during two seasons]]></article-title>
<article-title xml:lang="pt"><![CDATA[Glifosato e fertilizantes nitrogenados no controle de Sorghum halepense (L.) Pers. em duas épocas]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tejada]]></surname>
<given-names><![CDATA[Jorge Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Medrano]]></surname>
<given-names><![CDATA[Fabiola Condore]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cárdenas]]></surname>
<given-names><![CDATA[Edgardo Vilcara]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez]]></surname>
<given-names><![CDATA[Patricia Díaz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tobaru]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Lima  ]]></institution>
<addr-line><![CDATA[Lima ]]></addr-line>
<country>Peru</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Lima  ]]></institution>
<addr-line><![CDATA[Lima ]]></addr-line>
<country>Peru</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2024</year>
</pub-date>
<volume>8</volume>
<numero>22</numero>
<fpage>20</fpage>
<lpage>28</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_arttext&amp;pid=S2664-09022024000100020&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_abstract&amp;pid=S2664-09022024000100020&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_pdf&amp;pid=S2664-09022024000100020&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Sorghum halepense reduce significativamente la producción de varios cultivos. El uso de glifosato resulta relevante para el control de dicha especie, pudiendo mejorar su eficacia con adyuvantes como fertilizantes nitrogenados. Objetivo. Analizar técnica y económicamente el efecto de glifosato mezclado en tanque con dos fertilizantes (urea y sulfato de amonio) sobre el control de Sorghum halepense en dos épocas (primavera-verano y otoño-invierno). Materiales y Métodos. Se condujo el experimento bajo un diseño de bloques completos al azar con dos factores: dosis de producto comercial de glifosato (2 L ha-1, 3 L ha-1 y 4 L ha-1) y fertilizantes nitrogenados (5 kg ha-1 de urea y 3 kg ha-1 de sulfato de amonio), además de un testigo sin adición de fertilizante nitrogenado. Se evaluó en la maleza: altura de planta, cobertura, masa seca de rizomas y grado de control. Además, se analizaron los costos de cada tratamiento. Los resultados de altura de planta y masa seca de rizomas se sometieron a análisis de varianza y se utilizó la prueba de Tukey para comparar tratamientos. Resultados. La mezcla de glifosato con los adyuvantes nitrogenados redujo la altura, la cobertura foliar y el peso seco de rizomas de S. halepense en ambas épocas, en comparación a glifosato sin adyuvantes nitrogenados. Conclusiones. La aplicación de glifosato 2 L ha-1 con 3 kg ha-1 de sulfato de amonio mostró un control excelente de S. halepense a bajo costo, lo que sería una estrategia efectiva y económica en el manejo de dicha especie.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Sorghum halepense significantly reduces the production of several crops. The use of glyphosate is relevant for the control of this species, and its effectiveness can be improved with adjuvants such as nitrogen fertilizers. Objective. Analyze technically and economically the effect of glyphosate mixed in tank with two fertilizers (urea and ammonium sulfate) on the control of S. halepense in two seasons (spring-summer and autumn-winter). Materials and Methods. The experiment was conducted under a randomized complete block design with two factors: doses of commercial glyphosate product (2 L ha-1, 3 L ha-1 and 4 L ha-1) and nitrogen fertilizers (5 kg ha-1 of urea and 3 kg ha-1 of ammonium sulfate), and a control without addition of nitrogen fertilizer. Variables of weeds were: plant height, coverage, dry mass of rhizomes and degree of control. Additionally, the costs of each treatment were analyzed. The results of plant height and dry mass of rhizomes were subjected to analysis of variance, and the Tukey test was used to compare treatments. Results. The mixture of glyphosate with nitrogenous adjuvants reduced the height, leaf cover and dry mass of rhizomes of S. halepense in both seasons, compared to glyphosate without nitrogenous adjuvants. Conclusions. The application of glyphosate 2 L ha-1 with 3 kg ha-1 of ammonium sulfate favored excellent control of S. halepense at low cost, which would be an effective and economical strategy in the management of this species. &#8203;]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[RESUMO Sorghum halepense reduze significativamente a produção das culturas. O uso de glifosato resulta relevante no controle dessa espécie, podendo melhorar sua eficácia com adjuvantes como fertilizantes nitrogenados. Objetivo. Analisar técnica y economicamente o efeito de glifosato misturado em tanque com dois fertilizantes (ureia e sulfato de amônio) sobre o controle de S. halepense em duas épocas (primavera-verão e outono-inverno). Materiais e Métodos. Foi conduzido um experimento sob delineamento de blocos inteiramente casualizados com dois fatores: dose do produto comercial de glifosato (2 L ha-1, 3 L ha-1 y 4 L ha-1) e fertilizantes nitrogenados (5 kg ha-1 de ureia y 3 kg ha-1 de sulfato de amônio), ademais uma testemunha sem adição de fertilizante nitrogenado. Avaliou-se na planta daninha: altura, cobertura, massa seca de rizomas y grau de controle. Além disso, foram analisados os custos de cada tratamento. Os resultados de altura de planta e massa seca de rizomas foram submetidos a análise de variância e o teste Tukey se utilizou na comparação de tratamentos. Resultados. A mistura de glifosato com adjuvantes nitrogenados reduziu a altura, cobertura foliar e a massa seca de rizomas de S. halepense em ambas ases épocas, em comparação a glifosato sem adjuvantes nitrogenados. Conclusões. A aplicação de glifosato 2 L ha-1 junto com 3 kg ha-1 de sulfato de amônio mostrou controle excelente de S. halepense a baixo custo, o qual pode ser uma estratégia efetiva e económica no manejo dessa espécie.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Dosis de glifosato]]></kwd>
<kwd lng="es"><![CDATA[Impacto económico de herbicidas]]></kwd>
<kwd lng="es"><![CDATA[Adyuvante nitrogenado]]></kwd>
<kwd lng="es"><![CDATA[Control de malezas]]></kwd>
<kwd lng="en"><![CDATA[Glyphosate dosage]]></kwd>
<kwd lng="en"><![CDATA[Herbicide economic impact]]></kwd>
<kwd lng="en"><![CDATA[Nitrogen adjuvant]]></kwd>
<kwd lng="en"><![CDATA[Weed control]]></kwd>
<kwd lng="pt"><![CDATA[Dose de glifosato]]></kwd>
<kwd lng="pt"><![CDATA[Impacto econômico de herbicidas]]></kwd>
<kwd lng="pt"><![CDATA[Adjuvante nitrogenado]]></kwd>
<kwd lng="pt"><![CDATA[Controle de plantas daninhas]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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