Fig. 5
Fitted linear broken-line plots of the average concentration of ileal inositol (nmol/g dry matter) as a function of phytase inclusion level. The optimum concentration of phytase determined by linear broken-line model was 4,464 (SE = 531.0) units of microbial phytase (FTU)/kg of feed; [Y = 6,458 − 1.33 × (4,464 − X)] where X is less than 4,464, with r2 = 0.983 and P < 0.01. The SE for the estimates of the intercept and second parameter were 379.5 and 0.171, respectively