Phase Feeding in the Grow-Finish Period

Purdue University 1998 Swine Research Report. Several factors can affect the grow-finish pigs nutrient requirements and subsequent ration formulation, but those of greatest influence are genetics, sex, herd health, environmental temperature and stage of maturity. When expressed as a percent of the diet, nutrient requirements decrease with age or maturity. Theoretically, this occurs on a daily basis, but practically it is not feasible or necessary to reformulate that frequently. This experiment compared the feeding of either 1, 2, 3, 4 or 5 diets to pigs from 50 to 250 lb. The variable studied was crude protein or amino acid level.