{"id":11161,"date":"2022-12-02T02:13:34","date_gmt":"2022-12-02T01:13:34","guid":{"rendered":"https:\/\/socialagri.com\/agriFM\/?post_type=podcast&#038;p=11161"},"modified":"2022-12-02T02:13:34","modified_gmt":"2022-12-02T01:13:34","slug":"dietary-inclusion-of-tannins-to-replace-antibiotics-in-ruminants","status":"publish","type":"podcast","link":"https:\/\/socialagri.com\/agriFM\/podcast\/dietary-inclusion-of-tannins-to-replace-antibiotics-in-ruminants\/","title":{"rendered":"Dietary inclusion of tannins to replace antibiotics in ruminants"},"content":{"rendered":"Dietary inclusion of antibiotics for growth promotion in farm animal production has be a common practice for several decades. Resulting in increased efficiency levels in animal production.\r\n<ul>\r\n \t<li>However, the use of antibiotic growth promoters has been\u00a0 widely associated with the promotion and\/or <strong>selection of antibiotic-resistant microorganisms<\/strong> in farm animals (<em>Chattopadhyay<\/em>, 2014).<\/li>\r\n<\/ul>\r\nExtensive research has been conducted over the past two decades to look for <strong>natural alternatives to antibiotics<\/strong> in feed. Plant compounds (or phytogenic compounds) have been attributed as great potential alternatives to AGPs (<em>Yang et al<\/em>., 2015).\r\n\r\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-110987\" src=\"https:\/\/nutrinews.com\/wp-content\/uploads\/2022\/07\/item.jpg\" alt=\"\" width=\"22\" height=\"19\" \/> Amongst these,<strong> vegetable <a href=\"https:\/\/nutrinews.com\/en\/tannin-inclusion-for-monogastric-animal-diets\/\" target=\"_blank\" rel=\"noopener\">tannins<\/a><\/strong> have drawn considerable attention and are probably some of the most studied compounds. This is especially true for ruminants.\r\n\r\n&nbsp;\r\n\r\n<span style=\"color: #e80549;font-size: 18pt\"><span style=\"color: #e80549\"><span style=\"font-size: 24px\"><b>Chemical<\/b><\/span><\/span><strong style=\"color: #e80549;font-size: 18pt\">\u00a0structure and presence of tannins<\/strong><\/span>\r\n\r\n<em>Tannins are a heterogeneous group of <strong>phenolic compounds<\/strong> with diverse structures that share their <strong>abilities to bind and precipitate proteins<\/strong>.<\/em>\r\n\r\nThey are usually classified into 3 main groups:\r\n<ul>\r\n \t<li><strong>Hydrolyzable tannins (HT)<\/strong><\/li>\r\n \t<li><strong>Condensed tannins (CT)<\/strong> (also called proanthocyanidins)<\/li>\r\n \t<li><strong><a href=\"https:\/\/en.wikipedia.org\/wiki\/Phlorotannin\" target=\"_blank\" rel=\"noopener\">Phlorotannins<\/a> (PT)<\/strong><\/li>\r\n<\/ul>\r\n<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-128622 size-medium\" src=\"https:\/\/nutrinews.com\/wp-content\/uploads\/2022\/11\/Diseno-sin-titulo-2022-11-30T162410.311-300x236.png\" alt=\"\" width=\"300\" height=\"236\" \/>\r\n\r\nThe first 2 groups are found in terrestrial plants while PTs are found only in marine brown algae.\r\n\r\nTannins are widely distributed amongst the plant kingdom, being especially abundant in nutritionally important forages, shrubs, cereals and medicinal herbs (Salunkhe et al., 1982, Wang et al., 1999).\r\n\r\nTannins tend to be more abundant in the vulnerable<strong> parts of plants<\/strong>, e.g., new leaves and flowers (Terrill et al., 1992, <em>Van Soest<\/em>, \u00a01982,\u00a0 <em>Frutos et al.<\/em> , 2004).\r\n\r\nChemical structures and tannin concentrations vary greatly between plant species, growth stages and growth conditions.\r\n\r\n<span style=\"color: #e80549;font-size: 18pt\"><strong>Biological activity of tannins<\/strong><\/span>\r\n\r\nTannins serve as part <strong>of the plant&#8217;s defense system against pathogen invasion and insect attacks<\/strong>. Thest possess numerous biological activities, such as:\r\n<ul>\r\n \t<li><strong>Antimicrobial properties<\/strong><\/li>\r\n \t<li><strong>Antiparasitic properties<\/strong><\/li>\r\n \t<li><strong>Antioxidant capacity<\/strong><\/li>\r\n \t<li><strong>Antiviral properties<\/strong><\/li>\r\n<\/ul>\r\nThese activities vary greatly depending on the chemical composition and structure of tannins. As well as due to other factors like: microorganism species, growth stages and\/or host species (Hoste et al., 2006, <em>Hoste et al.<\/em> , 2012).\r\n\r\n<span style=\"font-size: 18pt\"><strong><span style=\"color: #e80549\">Use of tannins in ruminants<\/span><\/strong><\/span>\r\n\r\nTannins, especially CTs, are widely distributed in nutritionally important forages, trees, and shrubs.\r\n\r\nCondensed tannins may have beneficial or harmful effects for ruminants, depending on:\r\n<ul>\r\n \t<li>The <strong>amount consumed<\/strong> by the animals<\/li>\r\n \t<li><strong>Type and chemical structure<\/strong><\/li>\r\n \t<li>The composition of the rest of the <strong>diet<\/strong> (especially the concentration of CP) (<em>Mueller-Harvey<\/em>, 2006)<\/li>\r\n<\/ul>\r\nIt is generally believed that the presence of CTs in tempered forages at low to medium concentrations (&lt;50 g\/kg DM) can benefits ruminant by<strong> improving protein utilization, <\/strong>without negatively affecting feed intake nor nutrient digestibility (<em>Barry and Mcnabb<\/em>, 1999, <em>Waghorn,<\/em> 2008).\r\n\r\nTheir capacity to precipitate proteins, as well as their antimicrobial, antiparasitic and antioxidant activities are probably the main reasons to consider the inclusion of tannins in ruminant diets.\r\n\r\n&nbsp;\r\n\r\n<em>Waghorn (<\/em>2008)showed that when feeding forages as a single diet, an amount of approximately(30 g TC\/kg DM) condensed tannins in L. corniculatus proved to be <strong>beneficial for ruminant production. On the other hand,<\/strong> CTs found in<em> Hedysarum coronarium<\/em> and <em>L. pedunculatus<\/em> ( with concentrations greater than 50 g\/kg DM) did not seem to offer any other productivity benefit than <strong>mitigating parasite impacts.<\/strong>\r\n\r\nLow to medium concentrations of condensed tannins can benefit the efficiency of ruminant production. As these reduce protein degradation within the rumen, which<strong> increases the amount of dietary protein that reaches the small intestine and is<\/strong> <strong>absorbed<\/strong> (Wang et al., \u00a01994, <em>Wang et al.<\/em> , 1996).\r\n\r\nRead full article <a href=\"https:\/\/nutrinews.com\/en\/dietary-inclusion-of-tannins-to-replace-antibiotics-in-ruminants\/\" target=\"_blank\" rel=\"noopener\">here<\/a>","protected":false},"author":8,"featured_media":0,"parent":0,"menu_order":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"categories":[132],"tags":[],"canales":[236],"Idioma":[15],"intereses":[325],"participantes":[],"acf":{"link_podcast1":"https:\/\/nutrinews.com\/wp-content\/uploads\/2022\/12\/Tannins-in-Ruminant-Diets.mp3","imagen_podcast1":"https:\/\/nutrinews.com\/wp-content\/uploads\/2022\/12\/Diseno-sin-titulo-2022-12-01T201128.943.jpg"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.9 - 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