Table 1.

Ileal and total tract digestibility equations

Items	Equations
Apparent total tract digestibility phosphorus, %	[(Phosphorusintake − Phosphorusfecal)/Phosphorusintake] × 100
Standardized total tract digestibility phosphorus, %	[(Phosphorusintake − (Phosphorusfecal − Phosphorus basal endogenous losses))/Phosphorusintake] × 100
Apparent ileal digestibility AA, %	[(AAintake − AAileum)/AAintake] × 100
Standardized ileal digestibility AA, %	[(AAintake − (AAileum − AA basal endogenous losses))/AAintake] × 100