中文摘要：

对伊拉兔在60、70、80日龄屠宰的胴体和肉质量进行比较研究,结果表明：宰前活质量、热胴体质量、冷却胴体质量、参考胴体质量、屠宰率、肾周脂肪质量/参考胴体质量、可解剖脂肪质量/参考胴体质量均随日龄的增加而明显增大（P〈0.05）;胴体的滴水损失随日龄增大而明显减少（P〈0.05）;PH_（24h）值随日龄增加有下降趋势;股二头肌L＊、a＊值在70日龄和80日龄组间无显著差异（P〉0.05）,背最长肌L＊、a＊值在各日龄组间无显著差异（P〉0.05）;背最长肌系水力和剪切力在70日龄和80日龄组间无显著差异（P〉0.05）,且均大于60日龄;背最长肌的蒸煮损失随日龄增加而明显减小（P〈0.05）;背最长肌和后腿肌的粗蛋白、粗灰分含量在各日龄组间无显著差异（P〉0.05）,粗脂肪含量随日龄增大而明显增加（P〈0.05）,而水分含量有一定减小。伊拉兔在60日龄屠宰生长潜力未充分发挥,70日龄屠宰效益好,80日龄屠宰改善了胴体和肉的品质。

英文摘要：

The effect of slaughter age（60,70 and 80 days） on carcass and meat quality of Hyla rabbits was investigated.Slaughter weight,hot carcass weight,chill carcass weight,reference carcass weight,dressing percentage,perirenal fat/reference carcass weight ratio,dissectional fat/reference carcass weight ratio revealed a significant increase with slaughter age（P 0.05）,whereas carcass drip loss exhibited a significant decrease（P〈0.05）.pH_（24h） showed a downward trend with the extension of slaughter age.Lightness（L＊） and redness（a＊） of biceps femoris（BF） muscle had no difference between70 and 80 days.Similarly,L＊ and a＊ values of longissimus lumborum（LL） muscle showed no difference among three ages.Water-holding capacity and shear force of LL muscle had no difference between 70 and 80 days,while lower values were observed when Hyla rabbits were slaughtered at the age of 60 days.Cooking loss significantly decreased with increasing slaughter age in LL muscle（P〈 0.05）.In LL and hind leg muscles,the contents of crude protein and crude ash exhibited no difference at different slaughter ages,while crude fat content significantly increased and water content slightly decreased with the extension of slaughter age.These results showed growth potential of Hyla rabbits was not fully developed when they were slaughtered at 60 days old,and good slaughter benefit was achieved at the age of 70 days,whereas eating quality of carcass and muscle was improved at the age of 80 days.