Impacts of reduced-crude protein diets on key parameters in male broiler chickens offered maize-based diets.

N retention ( P > 0.25) was not influenced by treatment but highly significant responses ( P < 0.001) were observed for the 3 parameters of energy utilization.

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Alternatively, there were significant increases in concentrations of lysine (49.6%; P = 0.023), threonine (65.9%; P < 0.001), and methionine (24.3%; P = 0.056) closely approached significance on the basis of a pair-wise comparison.

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