Study on Effect of Hybridization between 3 Foreign Special Meat-sheep Breeds and district Sheep Breed in Drought Agricultural Region of Middle Shanxi

WEI Wu-chuan1, DU Jian-zhong2, HUA Shao-feng2, WANG Gai-lian3, ZHOU Xiu-ying4 (1.Life Science Department, Zhanjiang Normal College, Zhanjiang 524048,China; 2.Lanzhou Institute of Animal Science and Veterinary Medicine, Chinese Academy of Agriculture Science, Lanzhou 730050,China; 3. Reproduction and ImprovementStation of Farm Animal Center of Shouyang County, Shouyang Shanxi, 524048,China; 4. Popularization Station of Agriculture Tecnique Center of Shouyang County. Shouyang, Shanxi 524048,China)

Shouyang-type area for dry-farmland; meat sheep; breed cross; fattening production

foreign specialized meat-sheep breeds-Charolais, Dorset and Border Leicester were introduced to Shouyang county Shanxi province and hybridized with the district sheep, where one of the country agricultural experimental station for dry-farmland is situated on. In the meantime, we developed corn stalk process and utilization to raise sheep in order to seek a high-efficiency manner for meat-sheep production. Our experimental results manifested that growthinese and fattening performance of first filial generations (F1) between 3 foreign breeds and the district breed improved a lot. 4 months weaning weight of F1 between Charolais sheep and district sheep (CD F1) raised 15.46% in sheep-run manner, and that was 15.93% for F1 between Dorset sheep and district sheep (DD F1), and 13.68% for F1 between Border Leicester sheep and district sheep (BD F1). At fattening, daily post weaning gain of CD F1 raised 15.5% more than that of district sheep. The fattening traits of CD F1 and DD F1 are better than that of BD F1, average daily post weaning gain of them exceed 180g, 16.9% higher than that of BD F1. But because of lower lamb reproductive livability, CD F1 also had a lower overall productivity when compared with DD F1 and consequently the first selectable hybridization combination was recommended as breed cross between Dorset sheep and district sheep (DD F1). In regard to manner of meat-sheep production, we recommended following methods because of district climate: (1) arrange the mating time at April and May or twice for all the year, one at April and May, and another at autumn. (2) high nutrient density and housing fattening manner is suitable for autumn lamb, otherwise ,run fattening fits for spring lamb.(3) corn stalk should be processed by EM fermentation or by carbamide silage and then given to the fattening lamb.