Fig. 6From: Progress towards reduced-crude protein diets for broiler chickens and sustainable chicken-meat productionQuadratic relationship (r = 0.702; P = 0.003) between dietary CP concentrations and free threonine plasma levels across five studies where y = 11,557–107.5×CP + 0.263×CP2. Adapted from Moss et al. [8]; Chrystal et al. [11,12,13,14]Back to article page