欧拉羊与山谷型藏羊杂交效果观察初报

Preliminary Report on Effects of Crossbreeding of Oula Tibetan and Valley-Type Tibetan Sheep

引进草地型藏羊欧拉羊杂交改良山谷型藏羊,结果表明:引进的欧拉羊生理指标正常,对在林间草甸类和高山灌丛草场与山谷型藏羊同群放牧较适应;试验组受胎率、繁殖率、繁殖成活率比对照组分别高2.65%、2.69%、3.81%;欧×山杂交F1代初生公、母羊体高、体长、胸围及管围比同期对照组公、母羊分别提高了3.20 cm和4.50 cm、1.97 cm和2.25 cm、4.10 cm和2.20 cm、0.53cm和0.40 cm;体重提高0.62 kg和0.53 kg,比对照组分别提高了19.68个百分点和17.97个百分点。经过t检验,杂交F1代初生公、母羊体重、体高、体长、胸围极显著的高于对照组初生公、母羊(P<0.01);管围差异显著(P<0.05)。

Oula Tibetan sheep was introduced to improve Valley -type Tibetan sheep. The results showed that physiological indexes of introduced Oula Tibetan were normal ; Oula Tibetan was adapted to same group grazing with Valley - type Tibetan sheep in forest meadow and alpine shrub meadow. Pregnancy rate, fertility, reproductive and survival percent of test group were higher than control group for 2.65%, 2.69% and 3.81%, respectively. Male and female height of birth, body length, chest length and vessel length F1 generation of Oula × Valley - type increased 3.2cm and 4.5cm, 1.97cm and 2.25cm, 4.10cm and 2.20cm,0.53cm and 0.40cm, respectively. Body weight increased 0.62kg and 0.53kg, that is to say, increased 19.68% and 17.97% comparing to control group. T- test indicated that F1 generation male and female body weight, body height, body length and chest length were significantly higher than control group （ P 〈 0.01 ）, vessel length was significant difference （ P 〈 0.05 ）.