The Nutrient Requirements of Ruminant Livestock: Technical Review, Issue 2

adequate agric amino acid animals apparently digested Appendix Table Blaxter body weight breeds bullocks calcium calculated calf calves carotene castrates cattle coefficient of absorption copper crude protein daily dairy deficiency degradability dietary content dietary requirements dry matter intake edition effects efficiency of utilization empty-body weight endogenous endogenous faecal loss endogenous loss energy retention equation fasting metabolism Friesian g/day g/kg given grass growth heifers increase iodine iron lactating cows lactation lambs live weight Live weight kg liver liveweight gain magnesium maintenance metabolism mg Fe/kg mg Zn/kg mg/kg DM mg/kg live weight microbial milk yield MJ/day MJ/kg nitrogen Nutr nutrients Ørskov pelleted phosphorus potassium pregnancy protein requirements ration regression requirements g/day retinol roughage rumen ruminants selenium sheep silage sodium sources suggested tissue unpublished urea urinary utilization of metabolizable vitamin B12 vitamin D weight per day zinc µg/kg live