陕北农牧交错带肥羔生产技术研究

Production Technology of Fat Lamb in Agro-pastoral Transitional Region of Northern Shaanxi

为探讨陕北农牧交错带的肥羔生产技术,开展了非繁殖季节湖羊和小尾寒羊的诱导发情试验,以及这两个品种与杜泊和陶赛特公羊的二元杂交或者以萨福克为终端父本的三元杂交试验。结果表明:湖羊和小尾寒羊一代羔羊的初生重较接近,但后期生长速度差异大,4月龄前以杜湖羔羊生长速度最快,其排序是:杜湖F1>杜寒F1>陶湖F1>陶寒F1,均明显高于湖羊和小尾寒羊。三元杂种羔羊也表现出同样的趋势,2月龄平均体重均达到22kg以上,各阶段体重明显显著高于二元杂种羔羊。研究结果提示,萨福克羊是较理想的终端父本品种,三元杂交更适合乳羔肉生产。

The Hu sheep and Small-tailed Han sheep were treated for estrus synchronization and cross experiment mated by Dorper,Poll Dorset and Black Suffolk Rams in unoestrus season to explore the production technologies of fat lamb in the farming-pastoral region of Northern Shaanxi.The results showed that average birth weights of F1 lambs from DH(Dorper♂×Husheep♀),DS(Dorper♂×Small-tailed Han sheep♀),PH(Poll Dorset♂×Husheep♀)and PS(Poll Dorset♂×Small-tailed Han sheep♀)were similar,but the differences of growth rates at late were significant,the DH F1 Lambs grew fastest before 4months old.Their growth rates were faster than that of Hu sheep and Small-tailed Han sheep,and the order was DH> DS> PH> PS.The same phenomenon was also observed in three-way cross lambs.Their average body weight at 2months old reached more than 22 kg,and the body weight at different ages were significantly higher than that of two-way cross lambs.therefore Suffolk is the ideal terminal sire breed and threeway cross lambs were more suitable for the production of fat lamb.