Nutrient Requirements of Beef Cattle: Seventh Revised Edition, 1996
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Endogenous protein, carbohydrate and ash are:
Total fecal DM is calculated by summing protein, carbohydrate, fat and ash DM contributions from undigested feed residues, microbial matter, and endogenous matter:
Total Digestible Nutrients and Energy Values of Feedstuffs
Apparent TDN is potentially digestible nutrient intake minus indigestible bacterial and feed components appearing in the feces:
The ME values for each feed are based on assuming 1 kg of TDN is equal to 4.409 Mcal of DE and 1 Mcal of DE is equal to 0.82 Mcal of ME (NRC, 1976):
CALCULATION OF NET ENERGY VALUES
Total feed MP is the sum of each feed MP: