第二章-2 计算消化率VIP免费

DigestionMetabolismcagesfortotalcollectionoffecesandurineDigestionCalculatingDigestibilityandNutrientBalancefromTotalCollectionofFecesApparentDigestibility=NutrientIntake-FecalNutrientX100NutrientIntakeDigestionMeasuringDigestibilityandNutrientBalanceFecalExcretionsUndigestedresiduesMetabolicnutrient(Endogenoussecretions)ResiduesofsecretionsCellulardebrisExcretoryproductsDebrisandmetabolitesofmicroorganismsDigestionTrueDigestibility=NutrientIntakeFecalNutrientMetabolicFecalNutrient--NutrientIntakeX100DigestionDigestionMeasuringDigestibilityandNutrientBalanceIndicatorsforDeterminingDigestibilityCharacteristicsofindicators:InertNotdigestedMoveswithdigestaExamplesofindicators:LigninChromicoxideCeriumRareearthPolyethyleneglycol(PEG)DigestionMeasuringDigestibilityandNutrientBalanceApparentMarkerinFeedNutrientFecesDigestibility=100–100XXMarkerinFecesNutrientFeedDigestionDigestionDietDuodenumIleumFeces14%CP22%CP12%CP15%CP25ppm40ppm70ppm100ppmDigestionDietDuodenumIleumFeces14%CP22%CP12%CP15%CP25ppm40ppm70ppm100ppmDigestionMeasuringDigestibilityandNutrientBalanceUrinaryExcretionsWaterMetabolitescontainingnitrogenandsulfurMinerals–Na,Cl,K,PWatersolublevitaminsIndisease:SugarsProteinsKetonebodies