Figure 1

Fitted broken-line plot of ATTD of phosphorus as a function of dietary phytase level in weanling pigs (Exp. 1) with observed treatment mean values (n = 8 observations per treatment mean). The minimum dietary phytase level determined by broken-line analysis using least squares methodology was 1,016 FYT/kg (Y plateau = 68.4; slope below breakpoint = −0.025; Adjusted R² = 0.873).