Comparison of Body-size Indeses of Yak Calves with Wild Blood and Native Cantemporary Yak Calves in Jiuzhi County

47 Yearling yak calves with wild blood and 21 native cantemporary yak calves were used to detect the body-size indeses.The results showed that the average withers height was 90.20 cm,the average body length was 96.90cm,the average chest girth was 117cm,the average cannon circumference was 12.70cm and the average live weight was 93.40 kg for yearling yak colves with wild blovd and those indeses fot native contemporary yak calves were 86.70cm,93.30cm,115.90cm,13.00cm and 88.20kg,respectively,suggesting the growth performance of yearling yak calves with wild blovd was better than those of nativ contemporary yak calves.