Effect of lysine on growth performance and activity of lipase and amylase in domestic quail, Coturnix japonica diets

This work aimed to study the effect of dietary amino acid lysine supplementation on growth performance and activity of the digestive enzymes in the intestine in quail diets. A total of 180 one-day-old Japanese quail were divided into four groups, each with 45 chicks and 3 replications. The experiment was performed for 42 days. Group one was control, and those 2, 3 and 4 were fed a basic diet with amino acid lysine added at concentrations of 0.5, 0.9 and 1.03%, respectively. The results showed a significant improvement in the growth performance in terms of body weight and feed conversion ratio in quail birds. A significant activity of the intestinal digestive enzymes of amylase and lipase was also observed in the treated birds. We concluded that dietary lysine supplementation at a rate of 0.9 to 1.03% enhances the growth performance and as the activity of digestive enzymes of amylase and lipase in raising quail birds.