ANSC 3080 Lecture 5: Digestibility Nutrient Requiremetns and Ration Formulation
8 Dec 2017
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If fed not digestible = limits intake = impacts performance: we would like to, to ingredients that are fully digestible but this is not practical due to costs or shortfalls of ingredients. Process: collect feces, metabolism crates, fecal collection bags, subsample feces and store, analyze samples, % digestibility = amount nutrient consumed amount in feces. In regards to protein if could waste high quality protein if not feeding fermentable cho: can use bypass proteins. Potentially antinutritive factors (anf) present: anf can tie up nutrients, examples, lignin, avidin ties up biotin, thiaminase from abnormal fermentation which ties up thiamin, anf dictate specific feed ingredients for species. How the ration will be fed: tmr (total mixed ration) vs. top dressing (sprinkle on top, tmr, consistent intake, every bite is same with balanced nutrients, long vs. chopped roughage, long is fed separately from other ingredients.
