Figure 1.
Figure 1.

Fitted quadratic polynomial regression model on ADG as a function of increasing standardized ileal digestible (SID) Trp:Lys in 6- to 10-kg pigs (Exp. 1.). The maximum ADG was estimated at 23.9% (95% confidence interval: [<14.5%, >24.5%]) SID Trp:Lys.

 


Figure 2.
Figure 2.

Fitted broken-line linear regression model on G:F as a function of increasing standardized ileal digestible (SID) Trp:Lys in 6- to 10-kg pigs (Exp. 1). The maximum G:F was estimated at 20.4% (95% confidence interval: [14.3%, 26.5%]).

 


Figure 3.
Figure 3.

Fitted quadratic polynomial regression model on ADG as a function of increasing standardized ileal digestible (SID) Trp:Lys in 11- to 20-kg pigs (Exp. 2.). The maximum ADG was estimated at 21.2% (95% confidence interval: [20.5%, 21.9%]) SID Trp:Lys.

 


Figure 4.
Figure 4.

Fitted broken-line linear (BLL) and broken-line quadratic (BLQ) regression models on G:F as a function of increasing standardized ileal digestible (SID) Trp:Lys in 11- to 20-kg pigs (Exp. 2.). The maximum G:F was estimated at 16.6% (95% confidence interval [CI]: [16.0%, 17.3%]) and 17.1% (95% CI: [16.6%, 17.7%]) SID Trp:Lys in the BLL and BLQ models, respectively.