Abstract:Abstract:In order to study the feeding effect of different breeding methods on Gannan yak calves, 90 newborn calves with similar age and body condition were randomly selected, 30 calves in each group, which were divided into experimental group 1 (early weaning at 3 months of age + supplemental feeding + grazing), experimental group 2 (full lactation + supplemental feeding + grazing at 6 months of age), and control group (traditional grazing) according to the different lactation methods. At 6 months of age, the weight of group 2 was 52.47kg, and the chest circumference was 99.7cm, which was 8.44kg and 13.43kg higher and 9.11cm and 25.56cm taller than that of group 1 and the control group respectively, and the average daily weight gain was 0.263kg, which was 0.033kg and 0.049kg more than that of group 1 and the control group respectively; the weight of group 1 was 95.16kg and the chest circumference was 114.2cm, and the average daily weight gain was 0.263kg, which was 0.033kg and 0.049kg more than that of group 1 and the control group respectively. At 12 months of age, the weight reached 95.16kg, the chest circumference reached 114.2cm, the weight gained was 16.56kg and 31.08kg, the height was 8.89cm and 17.45cm, and the average daily weight gain was 0.371kg, which was 0.032kg and 0.135kg more than that of the test group 1 and the control group, respectively.The results showed that, in the semi-agricultural and semi-pastoral areas of Gannan, yak calves bred with full lactation before the age of 6 months had good growth and development, and the effect of weight gain was good, and the yak calves had good growth and development, and the yak calf had good growth and development. The results showed that, in Gannan semi-agricultural and semi-pastoral areas, the growth and development of yak calves before 6 months of age was good, and the weight gain effect was obvious, which was favorable to breed high-quality reserve yaks, and thus enhance the productivity of yaks.
