{"id":15533,"date":"2021-12-08T07:00:55","date_gmt":"2021-12-08T13:00:55","guid":{"rendered":"https:\/\/www.insta-pro.com\/?p=15533"},"modified":"2021-12-08T07:00:55","modified_gmt":"2021-12-08T13:00:55","slug":"nutrientes-digestibles-totales-tdn-son-utiles","status":"publish","type":"post","link":"https:\/\/instapro.spinuhost.com\/es\/blog\/nutricion-tecnologia\/nutrientes-digestibles-totales-tdn-son-utiles\/","title":{"rendered":"Nutrientes digestibles totales (TDN): \u00bfSon \u00fatiles?"},"content":{"rendered":"<p>Existen numerosos m\u00e9todos de evaluaci\u00f3n de los ingredientes del pienso animal. Esto es importante, puesto que la composici\u00f3n y las caracter\u00edsticas de los ingredientes que componen una dieta completa <a href=\"https:\/\/www.insta-pro.com\/en\/blog\/nutritionandtechnologies\/are-your-animals-getting-all-they-can-out-of-corn\/\">afectan al rendimiento del animal<\/a>, y los gastos equivalen al ~70 % o m\u00e1s de los gastos de producci\u00f3n total.<\/p>\n<p>Uno de los m\u00e9todos de evaluaci\u00f3n se denomina \u201c<a href=\"https:\/\/beef.unl.edu\/learning\/feedanalysis.shtml\">nutrientes digestibles totales<\/a>\u201d, o TDN, y a pesar de que su popularidad est\u00e1 disminuyendo, todav\u00eda resultan \u00fatiles, especialmente en el sector c\u00e1rnico. Es importante saber que <a href=\"https:\/\/books.google.com\/books?hl=en&amp;lr=&amp;id=EgWw2Kd9mb4C&amp;oi=fnd&amp;pg=PT16&amp;ots=pQDSEr7Vji&amp;sig=PFLzwDst6Z2ZjwSnp-YSdsyK-0g#v=onepage&amp;q&amp;f=false\">existen<\/a> distintas versiones de TDN <a href=\"https:\/\/books.google.com\/books?hl=en&amp;lr=&amp;id=EgWw2Kd9mb4C&amp;oi=fnd&amp;pg=PT16&amp;ots=pQDSEr7Vji&amp;sig=PFLzwDst6Z2ZjwSnp-YSdsyK-0g#v=onepage&amp;q&amp;f=false\">(consulte de la p\u00e1g. 13 en adelante)<\/a> en funci\u00f3n del tipo de ingrediente en cuesti\u00f3n, por lo tanto, al consultar los valores es importante comprender qu\u00e9 ecuaci\u00f3n se est\u00e1 usando.<\/p>\n<p>El valor de los TDN se expresa en porcentaje. Los c\u00e1lculos generales, de al menos algunas versiones, se explican con detalle <a href=\"https:\/\/homesteadontherange.com\/2015\/03\/10\/what-is-tdn\/\">aqu\u00ed<\/a>. La idea principal es que las composiciones y las propiedades de las principales categor\u00edas de nutrientes se a\u00f1aden para lograr una calificaci\u00f3n. Las categor\u00edas son prote\u00edna cruda, fibra cruda (o una medici\u00f3n espec\u00edfica de fibra), grasas y aceites y extracto libre de nitr\u00f3geno, cada una de las cuales se corrige individualmente para una digestibilidad total del tracto, mientras que las grasas y aceites, ricos en energ\u00eda, reciben una correcci\u00f3n del factor energ\u00e9tico. Esencialmente, a medida que la digestibilidad total del tracto de cualquier componente aumenta, los TDN aumentar\u00e1n. Esto ocurrir\u00e1 m\u00e1s r\u00e1pidamente con grasas y aceites debido al factor energ\u00e9tico. Los TDN m\u00e1s altos equivalen a m\u00e1s energ\u00eda disponible para el crecimiento, al menos en teor\u00eda.<\/p>\n<p>Las ventajas de usar TDN son las siguientes:<\/p>\n<ul>\n<li>Las grandes cantidades de humedad y ceniza, ninguna de las cuales proporcionan energ\u00eda, disminuir\u00e1n el valor de los TDN (los TDN detectar\u00e1n los ingredientes diluidos).<\/li>\n<li>La digestibilidad del tracto total proporciona una idea general sobre la utilidad de la energ\u00eda en los ingredientes con prop\u00f3sitos productivos. La energ\u00eda no digerida no puede utilizarse para el crecimiento.<\/li>\n<li>Es preferible contar con TDN antes que no contar con nada.<\/li>\n<\/ul>\n<p>Sin embargo, el uso de TDN tiene ciertos inconvenientes. A continuaci\u00f3n se indican algunos:<\/p>\n<ul>\n<li>La categor\u00eda \u201cextracto sin nitr\u00f3geno\u201d es un t\u00e9rmino gen\u00e9rico. Todos los ingredientes tienen una composici\u00f3n de extracto sin nitr\u00f3geno distinta, con digestibilidades del tracto total diferentes.<\/li>\n<li>La prote\u00edna cruda es una categor\u00eda gen\u00e9rica. Son los amino\u00e1cidos de las prote\u00ednas los que influyen en el rendimiento del animal. Un valor de digestibilidad no funciona; cada uno tendr\u00e1 un <a href=\"https:\/\/www.insta-pro.com\/en\/blog\/nutritionandtechnologies\/express-soymeal-an-excellent-source-of-digestible-amino-acids-and-energy-for-swine\/\">valor distinto<\/a>.\n<ul>\n<li>Adem\u00e1s, la digestibilidad de los amino\u00e1cidos o prote\u00ednas, determinada sobre todo el tracto digestivo (en lugar de solamente al final del intestino delgado) a menudo es imprecisa, est\u00e1 sobrevalorada y los amino\u00e1cidos que permanecen aqu\u00ed contribuye poco, sino nada, a la prote\u00edna total corporal <a href=\"https:\/\/www.waveland.com\/browse.php?t=11\">(consulte aqu\u00ed, cap\u00edtulo 12)<\/a>.<\/li>\n<\/ul>\n<\/li>\n<li>Otros m\u00e9todos de determinaci\u00f3n de la energ\u00eda predicen mejor el rendimiento animal, como ya he mencionado anteriormente en otros <a href=\"https:\/\/www.insta-pro.com\/en\/blog\/nutritionandtechnologies\/evaluating-ingredients-energy-for-dairy-cows-tdn-vs-nel-part-6\/\">blogs<\/a>.<\/li>\n<li>De hecho, un <a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC6612784\/#B40\">estudio<\/a> que evalu\u00f3 las dietas con distintos TDN demostr\u00f3 que la ganancia c\u00e1rnica diaria media, la ingesti\u00f3n de alimento seco y las caracter\u00edsticas del esqueleto no se ven afectadas por los TDN.<\/li>\n<\/ul>\n<p>Por lo tanto, el valor de tener una cifra de TDN para un ingrediente o dieta completa es muy limitado. Esto es especialmente cierto para las concentraciones mejoradas mediante procesos, como el <a href=\"https:\/\/www.insta-pro.com\/en\/blog\/nutritionandtechnologies\/high-shear-dry-extruded-products-for-highly-digestible-rumen-microbial-protein-in-dairy-part-ii-high-shear-dry-extruded-corn\/\">ma\u00edz sometido a extrusi\u00f3n seca de alta fricci\u00f3n<\/a>, o para algunos ingredientes especiales.<\/p>\n<p>Las consideraciones de someter a prueba la calidad de los ingredientes deben realizarse usando ensayos de alimentaci\u00f3n animal, como Insta-Pro ha estado realizando desde hace 50 a\u00f1os.<\/p>\n<p>Si desea obtener el mejor valor de sus ingredientes en las formulaciones, p\u00f3ngase en contacto con nosotros.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Existen numerosos m\u00e9todos de evaluaci\u00f3n de los ingredientes del pienso animal. Esto es importante, puesto que la composici\u00f3n y las caracter\u00edsticas de los ingredientes que componen una dieta completa afectan al rendimiento del animal, y los gastos equivalen al ~70 % o m\u00e1s de los gastos de producci\u00f3n total. Uno de los m\u00e9todos de evaluaci\u00f3n [&hellip;]<\/p>\n","protected":false},"author":13,"featured_media":14416,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[7183],"tags":[9039,466,635,447,467],"class_list":["post-15533","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nutricion-tecnologia","tag-business-strategy-es","tag-estrategia-comercial-es-6","tag-formulacion-de-piensos","tag-planta-rentable-de-procesamiento-de-piensos","tag-procesamiento-de-piensos-y-alimentos-es-2"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.2 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Nutrientes digestibles totales (TDN): \u00bfSon \u00fatiles? - Insta-Pro<\/title>\n<meta name=\"description\" content=\"A pesar de que la popularidad de los \u201cnutrientes 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