丝羽乌骨鸡新品系早期生长发育规律及肉用性能的研究

The Early Growth Rule and Breeding Development on Meat Performance of New Fast Growing Silkies

对丝羽乌骨鸡肉用新品系第一世代和第二世代的体重累积生长曲线和日增重曲线的比较表明 :第二世代的生长曲线比第一世代的波动小 ,生长高峰提前了两周。用Logistic模型对两品系第二世代早期生长发育规律及肉用性能进行了研究 ,结果表明 ,其生长拐点为 1 0 8周龄 ;1 4周龄体重为 1 0kg ,半净膛率均达到 85 %以上 ,全净膛率均在 79%以上 ,胸肌率为 1 4 % ,腿肌率为 1 8%左右。

By describing growing curve of body weight and average daily gain of the first and second generation on silkies, the latter is found more steady and growing peaks is shortened by two weeks. The growth model is gaind through the logistic curve.It shows that the growth point of inflection is at 10.8 weeks. At 14 weeks, the body size is about 1kg,the percentage of semieviscerasted and viscerasted yield is about 85%, 79%; the percentage of chest meat and leg meat is 14%, 18%. Means difference of 9 carcass traits with t-test is analysed. And phenotypic correlation of these carcass traits is also analyzed.