<?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>S2664-09022021000300126</article-id>
<article-id pub-id-type="doi">10.33996/revistaalfa.v5i15.133</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Gestión de la energía dietaría en la reducción de costo de alimentación en la producción de huevos]]></article-title>
<article-title xml:lang="en"><![CDATA[Diet energy management in reducing feed cost in egg production]]></article-title>
<article-title xml:lang="pt"><![CDATA[Gestão da energia da dieta na redução do custo da ração na produção de ovos]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salvador Tasayco]]></surname>
<given-names><![CDATA[Elías]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bonifacio Huallanca]]></surname>
<given-names><![CDATA[Sandra Jackeline]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,aff1  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>5</volume>
<numero>15</numero>
<fpage>126</fpage>
<lpage>132</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_arttext&amp;pid=S2664-09022021000300126&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_abstract&amp;pid=S2664-09022021000300126&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_pdf&amp;pid=S2664-09022021000300126&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Precios altos del maíz y soya incrementa en más de 30% el costo de la dieta. La energía metabolizable (EM) es el componente clave de dicho costo. Reevaluar el nivel de EM permite definir el óptimo consumo de alimento y energía para mejorar el costo de alimentación. El objetivo fue determinar el efecto de tres niveles de EM sobre la respuesta productiva, calidad de huevo y margen sobre costo de alimentación de gallinas de postura. Se utilizaron 192 gallinas de la línea DEKALB de 80 semanas de edad, bajo un Diseño completo al Azar. Los niveles de EM: 2650, 2750 y 2850 Kcal/Kg, con cuatro repeticiones. Se evaluó la respuesta productiva, calidad de huevo y margen sobre costo de alimentación. Para los análisis estadísticos se usó el procedimiento GLM de SAS v 9.4. La calidad de huevo no fue afectada. El consumo de alimento aumento significativamente (P&lt;0.05) conforme se redujo el nivel de EM en la dieta. La ganancia de peso vivo fue mayor con el nivel más bajo de EM. El margen sobre el costo de alimentación para masa de huevo fue más alto con el nivel de 2650 Kcal de EM/Kg con una retribución económica +6.99%.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract High prices of corn and soybeans increase the cost of the diet by more than 30%. Metabolizable energy (ME) is the key component of that cost. Reassessing the level of ME allows to define the optimal consumption of food and energy to improve the cost of feeding. The objective was to determine the effect of three levels of ME on the productive response, egg quality and margin on feeding cost of laying hens. 192 hens of the 80-week-old DEKALB line were used, under a complete Random Design. ME levels: 2650, 2750 and 2850 Kcal / Kg, with four repetitions. The productive response, egg quality and margin on feed cost were evaluated. For statistical analyzes, the GLM procedure of SAS v 9.4 was used. Egg quality was not affected. Food consumption increased significantly (P &lt;0.05) as the level of ME in the diet decreased. Live weight gain was greater with the lowest level of ME. The margin on the cost of feeding for egg dough was higher with the level of 2650 Kcal of ME / Kg with an economic retribution + 6.99%.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo Os altos preços do milho e da soja aumentam o custo da dieta em mais de 30%. A energia metabolizável (EM) é o principal componente desse custo. Reavaliar o nível de EM permite definir o consumo ideal de alimentos e energia para melhorar o custo da alimentação. O objetivo foi determinar o efeito de três níveis de EM na resposta produtiva, qualidade dos ovos e margem no custo alimentar de poedeiras comerciais. Foram utilizadas 192 galinhas da linhagem DEKALB de 80 semanas, sob um Desenho Aleatório completo. Níveis de EM: 2650, 2750 e 2850 Kcal / Kg, com quatro repetições. A resposta produtiva, a qualidade do ovo e a margem sobre o custo da ração foram avaliadas. Para análises estatísticas, o procedimento GLM do SAS v 9.4 foi usado. A qualidade do ovo não foi afetada. O consumo de alimentos aumentou significativamente (P &lt;0,05) conforme o nível de EM na dieta diminuiu. O ganho de peso vivo foi maior com o menor nível de EM. A margem sobre o custo da alimentação da massa de ovo foi maior com o nível de 2650 Kcal de EM / Kg com uma retribuição econômica de + 6,99%.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Ponedoras]]></kwd>
<kwd lng="es"><![CDATA[Energía metabolizable]]></kwd>
<kwd lng="es"><![CDATA[Margen económico]]></kwd>
<kwd lng="en"><![CDATA[Layers]]></kwd>
<kwd lng="en"><![CDATA[Metabolizable energy]]></kwd>
<kwd lng="en"><![CDATA[Economic margin]]></kwd>
<kwd lng="pt"><![CDATA[Oedeiras]]></kwd>
<kwd lng="pt"><![CDATA[Energía metabolizável]]></kwd>
<kwd lng="pt"><![CDATA[Margem econômica]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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