【作者】 斯日古楞；

【导师】 敖长金；

【作者基本信息】 内蒙古农业大学 ， 动物营养与饲料科学， 2004， 硕士

【摘要】 本试验研究了日粮不同赖氨酸水平对0-3周龄雄性肉仔鸡生产性能和胴体品质的影响，各组的基础日粮相同，由玉米、豆粕和玉米蛋白粉等组成，含代谢能12.18MJ/kg，粗蛋白21%，蛋氨酸0.46%，赖氨酸0.65%，试验日粮赖氨酸水平设六个处理水平，分别为0.65%、0.80%、0.95%、1.10%、1.25%和1.40%。将1日龄健康爱拔益加雄性肉仔鸡450只随机等分6个处理组，每个处理5个重复，每个重复15只鸡，饲喂至21日龄，试验末分别检测生产性能、屠宰性能、血清激素含量和血液生化指标。试验结果表明：不同赖氨酸水平对0-3周龄雄性肉仔鸡总采食量(TFI)、平均日增重(ADWG)、饲料转化效率(FCR%)、全净膛率(CYR%)、胸肌率(BMR%)、腹脂率(AFR%)、血清中的三碘甲腺原氨酸（T3）的浓度均有极显著(P﹤0.01)或显著（P﹤0.05）影响，类胰岛素生长引子(IGF-Ⅰ)浓度随着赖氨酸水平的提高，呈增加趋势；赖氨酸水平对0-3周龄雄性肉仔鸡血清尿酸（UA）、甘油三酯（TG）、极低密度脂蛋白（VLDL）等的含量也有极显著(P﹤0.01)或显著（P﹤0.05）影响，随着日粮中赖氨酸水平的增加，UA、TG、VLDL含量先低后高，赖氨酸含量达到1.10%-1.25%时可以维持肉仔鸡正常快速生长和得到较好的胴体品质。更多还原

【Abstract】 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.更多还原