Dividing the growth period into several periods, each with
a smaller interval between body weights, allows producers to provide diets
that more closely meet the bird's nutrient requirements. Phase feeding of
several diets during the grow-out period can significantly reduce nitrogen
(N) and phosphorus (P) excretion. However, most companies cannot utilize
more than 3 to 4 diets for broilers and 5 to 6 diets for turkeys, primarily
because of mill handling, economic and logistical constraints, and trucking
costs.
New, rapid-growing genetic lines have been shown to have up to 69 percent
reduced P excretion and up to 55 percent reduced N excretion as compared
to older, slower-growing genetic lines. These reductions have come about
primarily through reduced time to market age and, therefore, reduced
maintenance requirements. Some feed manufacturers are currently formulating
poultry feeds on an ideal protein basis. An ideal protein is one in
which synthetic amino acids are used to balance protein intake to closely
Dividing the growth period into several periods, each with
a smaller interval between body weights, allows producers to provide diets
that more closely meet the bird's nutrient requirements. Phase feeding of
several diets during the grow-out period can significantly reduce nitrogen
(N) and phosphorus (P) excretion. However, most companies cannot utilize
more than 3 to 4 diets for broilers and 5 to 6 diets for turkeys, primarily
because of mill handling, economic and logistical constraints, and trucking
costs.
New, rapid-growing genetic lines have been shown to have up to 69 percent
reduced P excretion and up to 55 percent reduced N excretion as compared
to older, slower-growing genetic lines. These reductions have come about
primarily through reduced time to market age and, therefore, reduced
maintenance requirements. Some feed manufacturers are currently formulating
poultry feeds on an ideal protein basis. An ideal protein is one in
which synthetic amino acids are used to balance protein intake to closely
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