5 Rumen Development

5 Rumen Development - RumenDevelopment GutFunctionAfterBirth

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Rumen Development
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Gut Function After Birth Digestion and absorption similar to monogastric  Function of the reticular groove Enzyme activity of saliva, stomach and small  intestine different than in adult ruminant Rumen volume and papillae must develop Rumen microflora must become established Length of transition period between “functional non- ruminant” to “fully functional ruminant” is heavily diet- dependent
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Rumen Development Newborn rumen is nonfunctional Sterile, small, lack papillae Reticular groove shunts milk from esophagus  to omasum Rumen developed by Consumption of solid feed Consumption of water Controlled by the producer if animal is  separated from dam
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Rumen Development Undeveloped Rumen Developed Rumen
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Size of Ruminant Stomach  Compartments Compartment Adult, % Newborn, % Rumen 55 29 Reticulum 7 6 Omasum 24 14 Abomasum 14 51
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Reticular Groove Reticular groove is composed of two lips of tissue that run from the cardiac sphincter to the reticulo-omasal orifice Transport milk directly from the esophagus to the omasum Closure is stimulated by: Suckling Consumption of milk proteins and other milk components
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Nutritional Impact of Rumen By-Pass More efficient use of energy and protein No methane losses, heat of fermentation or ammonia losses Dietary requirements (100 kg calf gaining 1 kg/day)                                              Metabolizable      Digestible                                                energy               protein
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This document was uploaded on 02/14/2012.

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5 Rumen Development - RumenDevelopment GutFunctionAfterBirth

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