定远猪二元和三元杂交组合生产性能的研究

通过杂交 ,可以改进定远猪的生产性能 ,缩短商品猪的饲养周期 ,减少饲养成本 ,明显增进饲养者的养殖效益。研究结果表明 ,二元杂交组合 :杜定和大定较好 ,从初生达 90kg的日龄分别为 176d和 175d ,生长早期到后期的平均日增重为 5 78.2 3g和5 6 9.42g ,料肉比 3 .0 2和 3.2 1;三元杂交组合 :杜长定和大长定最好 ,从初生达 90kg的日龄分别为 15 1和 15 7d ,生长肥育期的平均日增重为 80 2 .39± 80 .31g和 773 .17± 80 .2 4g ,料肉比 3 .2 1和 3.2 8;成功地完成了攻关任务的生产性能指标

Study on the Productivity for Dingyuan Pigs from Two-way Cross and Three-way Cross

The productivityof pigswasimprovedby crossbreed. Used this method,the feeding cycle was shorter and feedingcost was lower so that the production efficiency was increased. The results showed as following: (I)The hybrid vigorsof Duroc × Ding and Large white × Ding were better among the two way cross combinations. The feeding days from birth to 90kg body weight were 176 and 175 respectively. Average daily gain during growing fattening period were 578.23g and 569.42g respectively. Feed to gain ratio (F/D) were 3.02 and 3.21 respectively. (II) The hybrid vigors of Duroc×Landrace×Ding and Large white × Landrace × Ding were better among the three-way cross combinations. The feeding days from birth to 90kg body weight were 151 and 157 respectively. Average daily gain during growing fattening period were 802.39±80.31g and 3.28 respectively. All the performances have rearched the targets set inthe plan of the key project.