ruminantproteinnutrition-文庫吧資料
2025-07-23 16:57本頁面
【正文】 protein by recycling N (as urea) back to rumen Ruminant vs Nonruminant Dissimilarities 1. Microbial population has profound effect on AA reaching . (cont.) d. Why we say nitrogen metabolism (vs protein metab.) ? Microbial intervention ? NH3 formation e. Disadvantage: more protein can be destroyed in the rumen than is synthesized Result = Net loss of protein Advantage: can have more protein leaving rumen than is in the diet Result = Net gain of protein Example: More Protein Leaving Rumen than was in Diet ? Weston amp。Ruminant Protein Nutrition More appropriate: Rumen Nitrogen Metabolism Protein Pathways in the Ruminant General Information ? No proteases in saliva ? No rumen secretions ? Microanisms responsible for protein digestion in rumen (and reticulum) ? Bacteria ? Protozoa Sources of Rumen Nitrogen ? Feed ? Protein nitrogen ? Protein supplements (SBM, CSM, grains, forages, silages... ? Nonprotein nitrogen (NPN) ? Usually means urea ? However, from 5% of N in grains to 50% of N in silage and immature forages can be NPN ? Endogenous (recycled) N ? Saliva ? Rumen wall Ruminal Protein Degradation ? Fermentative digestion – enzymes of microbial origin ? MO proteases amp。 peptidases cleave peptide bonds and
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