<?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>2079-3480</journal-id>
<journal-title><![CDATA[Cuban Journal of Agricultural Science]]></journal-title>
<abbrev-journal-title><![CDATA[Cuban J. Agric. Sci.]]></abbrev-journal-title>
<issn>2079-3480</issn>
<publisher>
<publisher-name><![CDATA[Editorial del Instituto de Ciencia Animal]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2079-34802023000100014</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Rumen environmental and nutritional strategies to mitigate emissions from livestock]]></article-title>
<article-title xml:lang="es"><![CDATA[Estrategias ambientales y nutricionales del rumen para mitigar las emisiones del ganado]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chiariotti]]></surname>
<given-names><![CDATA[Antonella]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Research Center for Animal Production and Acquaculture  ]]></institution>
<addr-line><![CDATA[Monterotondo ]]></addr-line>
<country>Italy</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<volume>57</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2079-34802023000100014&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2079-34802023000100014&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2079-34802023000100014&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Methane is the single largest greenhouse gas produced by ruminants, 28-times the warming effect of carbon dioxide. Methane is a by-product of the anaerobic fermentation of carbohydrates and amino acids in the rumen to a lesser extent. It is produced by archaea, and it is considered a loss of feed energy that could otherwise be used for productivity. Economic progress and the world&#8217;s growing population will increase meat and milk product demands; when ruminant livestock increase, methane production increases, accelerating global warming in the process inevitably. A massive worldwide research effort has investigated various mitigation strategies that can be grouped into three categories: animal and feed management, diet formulation, and rumen manipulation. These approaches affect directly or indirectly the rumen microbiome thereby reducing rumen methanogenesis. The strategy is to improve forage quality or change the forage type or proportion or add supplements such as probiotics, oils, and enzymes that either reduce methanogenesis or shift the metabolic pathways leading to the H2 reduction as a useful substrate. Methanogens community composition rather than its size seems correlated to methane production and the diversity is influenced by H2 availability and interactions within and between H2-producing microbes in the rumen, so research needs to study the different mechanisms of methanogenesis according to dietary and environmental conditions in different ruminants&#8217; species.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[El metano es el mayor gas de efecto invernadero que producen los rumiantes y su efecto de calentamiento es 28 veces superior al del dióxido de carbono. Este es un subproducto de la fermentación anaeróbica de carbohidratos y aminoácidos en el rumen, en menor medida. Se produce por las arqueas y se considera una pérdida de energía alimenticia que, de lo contrario, podría usarse para la productividad. El progreso económico y la creciente población mundial aumentarán la demanda de productos cárnicos y lácteos. Una vez que aumente el número de rumiantes, aumentará la producción de metano, acelerando inevitablemente el calentamiento global en el proceso. Un esfuerzo masivo de investigación mundial ha analizado varias estrategias de mitigación que se pueden agrupar en tres categorías: manejo de animales y alimentos, formulación de dietas y manipulación del rumen. Estos enfoques afectan directa o indirectamente al microbioma del rumen, lo que reduce la metanogénesis ruminal. La estrategia es mejorar la calidad del forraje o cambiar el tipo o la proporción del forraje o añadir suplementos como probióticos, aceites y enzimas que reduzcan la metanogénesis o cambien las vías metabólicas que conducen a la reducción de H2 como sustrato útil. La composición, más que el tamaño, de la comunidad de metanógenos parece correlacionarse con la producción de metano y la disponibilidad de H2 y las interacciones dentro y entre los microorganismos productores de H2 en el rumen influyen en la diversidad, por lo que se debe estudiar los diferentes mecanismos de metanogénesis de acuerdo con las condiciones dietéticas y ambientales en diferentes especies de rumiantes.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[GHG mitigation strategies]]></kwd>
<kwd lng="en"><![CDATA[methane]]></kwd>
<kwd lng="en"><![CDATA[methanogenesis]]></kwd>
<kwd lng="en"><![CDATA[rumen microbiome]]></kwd>
<kwd lng="es"><![CDATA[estrategias de mitigación de GEI]]></kwd>
<kwd lng="es"><![CDATA[metano]]></kwd>
<kwd lng="es"><![CDATA[metanogénesis]]></kwd>
<kwd lng="es"><![CDATA[microbioma ruminal]]></kwd>
</kwd-group>
</article-meta>
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