中文摘要：

[目的]本研究旨在探讨在气候条件好、饲草饲料资源较丰富的地区开展犏牛“异地育肥、反季出栏”模式的可行性。[方法]从香格里拉县购入10月龄左右的牦犏牛7头,在昆明全舍饲异地育肥380d。育肥期间日粮以全株玉米青贮、精料补充料为主,糖蜜砖自由舔食,自由饮水。[结果]从育肥的第3个月开始公犏牛体重增加的速度明显快于母犏牛（P〈0.05）,特别是在育肥结束时公犏牛的体重达319.33kg,显著高于母犏牛的240.38kg（P〈0.05）;公犏牛的平均日增重593.86g,亦显著高于母牛的422.37g（P〈0.05）,表明公、母犏牛均可育肥,且以公牛的育肥效果更好。屠宰试验结果：公、母牛屠宰率分别为58.30%和53.14%,净肉率分别为46.86%和43.05%,两者比较差异不显著（P〉0.05）;犏牛通过异地舍饲育肥不但可比原产地放牧条件下的提前1~2岁出栏,而且有20%的犏牛产出A3级标准的高档肉。[结论]通过优化育肥料配方和强化饲养管理等措施,可极大提高犏牛的肉质,有望生产出高端牛肉产品,为“产地繁殖、异地育肥、反季出栏、提早出栏”的犏牛高效生产模式的建立提供依据,但规模化异地育肥效果有待研究。

英文摘要：

[Objective]The project of paper was to study the feasibility pattern on ＂off-site fattening cat- tle -yak, off-season slaughter or sale＂ in which had good climate, abundant forage grass, due to the devel- opment of cattle-yak rearing industry in the Qinghai Tibetan Plateau came in for an appointment with by the double restriction of the forage shortage and hardly cold in winter and spring. [Method]7 heads of cat- tle-yaks at 10 months age which were purchased from Shangri-La county would be carried out to fatten for 380 days in the house in Kunming. The ration of cattle-yak were mainly the silage with the whole corn plant, concentrate supplement, and freely licking molasses brick and drinking water during the fattening stage. [ResultlThe results showed that body weight of male cattle-yak increased significantly faster than that of female cattle-yak （P〈0.05） from the beginning of the third month fattening, especially the fattened body weight of male cattle--yak at the end of the fattening increased up to 319.33 kg, which was significantly higher than that of female cattle-yak with 240.38 kg （P%0.05）. The average daily gain in male cattle-yak was 593.86 g, which were significantly higher than that of female cattle-yak with 422.37 g （P〈0.05）. It indicated that male and female cattle-yak were both to be fattening, and the fattening effect of male cattle-yak was more. Slaughter results showed that the rates of slaughter and net meat were 58. 30% and 46.86% of male cattle-yak, and 53. 14% and 43.05% of female cattle-yak, respectively, but there were no significantly difference between male and female cattle-yak（P〈0.05）. However, cattle-- yak fattening with off-site in the house not only brought forward 1 or 2 years old for slaughter or sale, in comparison with cattle-yak reared in the natural habitat under grazing, but also produced out 20% fatte- ning cattle-yak which reached to the A3 standard of high grade meat. [Conclusion]Results indicated that cattle--yak or yak would produce high qualit