摘要
西门塔尔牛引入甘肃省10多年来改良本地牛效果显著,生产性能逐步提高。肥育120天的18月龄F_1、F_2和F_3阉公牛日增重分别为1.069、1.118和1.222kg,比本地牛提高45.28～130.57％(P<0.01);胴体重216.91、214.91和248.68kg,提高29.67～116.90％(P<0.01),屠宰率58.03％、57.46％和58.46％,提高4.73～11.46％,F_1、F_2母牛泌乳期标准乳产量为1596.70、1831.00kg,分别比本地牛提高54.15％、111.81％(P<0.01)。乳脂率分别为4.99％和3.75％。西杂牛饲料利用效率高,役用性能好,适应性强,具有较高的推广价值。应消除顾虑,作为当家品种在全省积极扩大受配数量和比重。
Simmental has been introduced to Gansu for 12 years used for crossingnative cows. Its crossbreeds have igher production performance significantly than na-tive cattle. After 120 days fattening, 1. 5 year old F_1、F_2 and _ teers were slaughtered.Dayly gain averaged 1. 069, 1. 118 and 1. 222kg respectively, carcass weight 216. 91,214. 1 nd 248. 66kg, and dressing percentage 58. 03%、57. 46% and 58. 46%. Milkyild of F_1 and F_2 cows averaged 596. 0 and 1831. 00kg respectively, and fat content 4. 99% and 3. 75%. simmental crossbreeds also have higher feed fficiency, betteradaptability and draft performance compared with native cattle. The results indicatedthat simmental s he best crossing sire compared with others. It should be widely useddoubtlessly for crossing as a main sire breed.
出处
《黄牛杂志》
1993年第3期72-75,78,共5页
Journal of Yellow Cattle Science
关键词
牛
西门塔尔牛
推广
crossing
dayly gain
carcass weight
dressing percentage
milk yield
fat content
rotational--terminal crosing
