Studies On Introduced Meat-breed Sheep(Borderdale And Poll Dorset)from New Zealand

Experiments were conducted to investigate the introduction effect of Borderdale (meat-wool sheep) and Poll Dorset (meat sheep) in Yongchang, Gansu and the quality of wool fiber, the index of physiological and biochemical, the traits of growth and development, reproductive traits and resisting power to disease were researched. The results showed that both breeds have the growth traits with the shear weight of 118.37?.96kg (g), 118.37?.96kg ()of 2.5 aged Borderdale and 120.21? 7.87kg (ci), 78.27 ?.53kg () of 2.5 aged Poll Dorset. The high percentage of lambing with 182.93% (Borderdale), 160.00% (Poll Dorset) and lamb livability with 154.35% (Borderdale), 121.21% (Poll Dorset) indicated a favorable reproductivity of two breeds. At the same time, Borderdale and Poll Dorset didn抰 showed much differences on wool quality and body cover under the well fed and managed conditions and the environments of the oasis in the hungry soil of Yongchang area (the woolcut of Borderdale is 9.49?0.44kg of male and 6.36 ?0.92kg of female). Furthermore, the resisting power to disease, the index of physiological and biochemical were all in the normal scope. To compare with native home, the traits of growth and development, reproductive traits and wool quality of two breeds showed a better results and no change in body conformation and breed trademark. It is concluded that the Borderdale and Poll Dorset sheep have a preliminary acclimation to the environment of Yongchang area and the introduction is successful. We suggested that the further researches on feeding, management and reproductive technologies should be made in order to exert the energetic effects of two breeds.