Submitted to: Council for Agricultural Science and Technology Issue Paper
Publication Type: Other
Publication Acceptance Date: 11/20/2001
Publication Date: N/A
Citation: Interpretive Summary:
Technical Abstract: Reducing dietary protein and phosphorus is an effective way to reduce excretion of nitrogen and phosphorus in urine and feces of swine, poultry, beef and dairy animals. Feeding protein to more precisely match metabolic needs (phase feeding) as the animal grows, or according to production level, can be one approach to lowering dietary protein for all species. More precisely balancing dietary amino acid supply can also be effective, particularly for poultry and swine. There is significant scope for reducing dietary phosphorus in swine and poultry diets by utilizing phytase. Most dairy producers, and many beef feedlot operators, overfeed phosphorus. Phosphorus can be reduced in most dairy diets by 20% or more without affecting animal productivity. Feedlot cattle normally need no supplemental phosphorus in their diets.