The Effect Of Levels Of Dietary Lysine On Performance And Eviscerate Quality In 0-3 Week Old Broiler Chickens

The effect of dietary lysine levels on performance and eviscerate quality were evaluated using six dietary treatments on 0-3 weeks broiler chickens. Diet based on corn, soybean meal, and corn protein powder was of equal ME (12.18MJ/kg), CP (21%), Met (0.46%), Lys (0.65%). Graded levels of Lysine (0, 0.15, 0.30, 0.45, 0.60, and 0.75%) were added to basal diet. A total of 450 AA male broiler chickens were divided in five replicates of 15 birds per treatment. The performance and eviscerate quality were measured at the end of the experiment. The results show that the lysine levels significantly affect the feed intake, average daily weight gain, feed conversion ratio, eviscerate, breast muscle and abdominal fat in 0-3 weeks old broiler chickens (P﹤0.01 or P﹤0.05). As the lysine levels increase, the concentration of IGF-Ⅰ has the tendency of increasing. The lysine levels affect concentetions of UA, TG, VLDL, too. As the levels of lysine increase, the concentrations of serum UA, TG, VLDL have the tendency of changing from low to high at first. In conclusion, 1.10%-1.25% of diet lysine can maintain normal growth rate and good eviscerate quality in 0-3 week old broiler chickens.