中文摘要：

为研究不同饲养模式对犊牦牛生产效益的影响,试验选择体况、年龄相近的健康犊牦牛550头,分成放牧加补饲和纯放牧饲养2个处理组,分别收集冷季为期168 d的体增重指标,结合饲养成本分析不同饲养模式对犊牦牛生产效益的影响。结果表明,冷季补饲使犊牦牛纯利润每日增加4.96元/头,而纯放牧模式下的犊牦牛每日损失0.51元/头。故冷季补饲在保障犊牦牛安全过冬的同时,又实现了有效增重,提高了牦牛的生产效益。

英文摘要：

To study the effects of different feeding patterns on the production benefits of yak calves, 550 healthy yak calves with similar body condition and ages were selected in the test. All yak calves were divided into 2 treatment groups, which were treated with grazing plus supplementary feeding and pure grazing, respectively. The indexes of body weight gain for yak calves from the two groups in cold season were collected for 168 d, respectively. Furthermore, the effects of different feeding patterns on the production benefits of yak calves were analyzed combining with the feeding costs. The results showed that supplementary feeding in cold season could increase the pure profit per head by 4.96 yuan per head, while the pure profit per head under pure grazing pattern lost by 0.51 yuan per head. Therefore, supplement feeding in cold season could not only ensure yak calves surviving through the winter, but also achieve effective weight gain and enhance yak＇s production benefits.