高原环境罗斯308肉鸡生长性能、屠宰性能及肌肉品质的测定分析

对云南高原地区引进培育的罗斯308商品肉鸡的生长性能、屠宰性能、肌肉品质等各项相应指标进行测定分析.结果表明,42日龄罗斯308肉鸡的成活率为97.9%,日增重53.36 g,料重比为1.75;全净堂率为79.85%,胸和腿肌pH值屠宰后45 min为6.03,宰后24 h pH值降低至5.90,降幅较小,嫩度为23.87 kg,失水率为17.23%,熟肉率为74.14%,表明罗斯308肉鸡饲养周期短,因而肉质鲜嫩;氨基酸分析除苯丙氨酸(4.38%)、赖氨酸(6.99%)和组氨酸(3.09%)的含量明显较高外,其它氨基酸含量均低于各种地方品种鸡.

Analysis of Performance of Growth and Slaughter and Muscle Quality of Ross 308 Broiler in Plateau

The performance of growth,performance of slaughter and muscle quality and other related obesity parameters of 42-day-old Ross 308 Broiler,which was introduced into Yunnan plateau,were determined.The results showed that the survival rate,average daily gain,the ratio of feed to gain and the brawn dressing ratio were 97.9%,53.36g,1.75,79.85%,respectirely.The pH value of chest and leg muscle after slaughtered by 45min was 6.03,after 24 h was 5.90,so the decrease of the pH value was low.Tenderness,water loss and cooked meat percentage were 23.87 kg,17.23%,74.14%,respectively and they showed that the meat quality of Ross 308 Broiler was fresh,because of its short breeding cycle.Except for the contents of phenylalanine(4.38%),lysine(6.99%),histidine(3.09%) are obviously higher than many other kinds of native broiler,other amino acids are all lower.