应用娟姗牛冻精杂交改良甘南牦牛效果观察

Effect of Jersey Cattle Frozen Semen to Crossbred and Improve Gannan Yaks

引进娟姗牛细管冻精通过人工授精技术杂交改良甘南牦牛试验。结果表明:娟姗牛冻精杂交改良甘南牦牛试验组受胎率为62.41%,比对照Ⅰ组低8.56%,比对照Ⅱ组低9.59%;繁殖率为53.55%,比对照Ⅰ组低4.51%,比对照Ⅱ组低6.45%;繁殖成活率为49.29%,比对照Ⅰ组高0.90%,比对照Ⅱ组低2.71%;产犊成活率比对照Ⅰ、Ⅱ组分别提高8.72%和5.18%。F1代初生公、母犊牛体高、体长、胸围、管围比同期对照Ⅰ、Ⅱ组公、母犊牛均高,体高、体长、胸围差异显著(P<0.05),管围差异不显著(P>0.05)。F1代初生公、母犊牛体重比同期对照Ⅰ组公、母犊牛分别提高6.84kg、4.74kg,提高了44.56、31.66个百分点;比同期对照Ⅱ组公、母犊牛分别提高8.84kg、6.84kg,提高了66.22、53.52个百分点,差异极显著(P<0.01)。

The results showed that the conception rate of test group was 62.41%, which was 2.10% lower than that of control group I and 9.59% lower than that of control group II; the reproduction rate was 53.55%, which was 1.28% lower than that of control group I and 6.45% lower than that of control group II ; the survival rate of calves was 92. 050/00, which was 9.70% and 5.18% higher than that of con- trol group I andII respectively; and the survival rate of breeding was 49.29%, which was 4.13% higher than that of control group I and 2. 71~%0 lower than that of control groupII. Additionally, the body height, body length, chest circumference and tube circumference of newborn F1 male and female calves were all higher than that of the control group I and II, of which the body height, body length and chest circumference were significantly different （P 〈 0.05） and no significant difference in tube circumference （P 〉 0.05）. Compared with the same period of the control group I , the male and female calves in the F1 generation increased by 6.84 kg and 4.74 kg respectively, up by 44.56% and 31.66% respectively; and the body weight of F1 male and female calves were significantly increased by 8.84 kg and 6.84 kg respec- tively, up by 66.22% and 53.52% respectively, higher than that of the control group II in the same peri- od （P 〈 0. 01）.