一定体重时略阳鸡与肉鸡体脂形成的比较

在一定生理学年龄下测定并比较了白羽略阳鸡 (WL)与现代肉鸡 Arbor Acres(AA)的产肉性能和体脂沉积能力。结果表明 ,达 1.8kg体重时 ,WL 的胸肉量较低 ,腿肉量较高 ,腹脂量较低 (P<0 .0 5或 P<0 .0 1) ;上市屠宰日龄平均为 132 d,约是 AA(43d)的 3倍多 ;WL 腹脂垫中脂肪细胞数量较多 ,但体积显著较小 ;杂交在显著提高肉鸡早期生长速度的同时 ,也使肉鸡肥度明显提高 ;高蛋白日粮能显著地降低腹脂量及肌肉中脂质含量 ,并存在明显的遗传与日粮互作效应

A comparison of carcass fat variables when lueyang fowl and broilers achieved a common physiological body weight

The characteristics of carcass and the cellularity of the adipose tissue were analyzed and compared when White feather lueyang (WL),Arber Acres (AA) broilers,and their F 1 achieved a common physiological age.The results demonstrated that,compared with AA and F 1 broilers at a body weight of \{1 800 g\},WL broilers were lower in breast meat yield,and higher in leg meat yield,and lower in abdominal fat weight ( P <0.05 or P <0.01),and the slaughtering age of WL was 132 d,which is 3 times more than that of AA (43 d).The number of adipose cells of WL in the abdominal fat pad was significantly larger,but the size of adipose cells was smaller ( P <0.01).F 1 has a greater postive heterosis in growth rate and abdominal fat composition.High protein diet can significantly reduce abdominal fat weight and fat percentage of the muscule of birds,and there is a greater interaction between genes and diet.