【摘要】 本研究用夏洛来、边区来斯特与河北细毛羊进行经济杂交,探讨河北细毛羊的最佳经济杂交组合。夏洛来杂种公、母羔和边区来斯特杂种公羔5月龄体重达到或接近25千克;7月龄都达30千克以上,与河北细毛羊母羔(25.64千克)差异极显著(P<0.01)。少量补饲与放牧的对比试验,河北细毛羊放牧组体重(29.48千克)最小,与其它组比较差异极显著(P<0.01);少量补饲组和放牧组都以夏洛来杂种羔体重最大,分别是39.25和35.59千克。1994年草场较好,7月龄放牧的夏洛来杂种羔体重达39.89千克。夏洛来杂种羔胴体重达17.90千克,超过了发达国家1992年出栏羊平均胴体重16千克的水平。结论是夏洛来羊是河北细毛羊理想的经济杂交父本。更多还原

【Abstract】 The present study was undertaken to find optimal cross combination of Hebei fine wool sheep via commercial cross with surnames of Charolai and Border Leicester being male parents. The results showed that the mean body weight (MBW) of Charolai fivemonth-old cross-breed lambs and Border Leicester five-month-old cross-breed ram lambs reached or approached 25kg, and that of seven-month-old ones was over 30kg, being significantly higher (P<0.01) than that of Hebei fine wool ewe lambs which was 25.64kg. The comparative experiment of small amount feeding (SAF) and Grazing (G) revealed significant differences (P<0.01) between every testing groups in which the MBW of Hebei fine wool sheep G group lambs was the lowest, both that of SAF group and that of G group of Charolai cross-breed lambs was the highest (39.25 and 35.59kg). With better Pasture in 1994, the MBW of Charolai grazing cross-breed lambs reached 39.89kg, while their mean carcass weight (MCW) reached 17.9kg over the world mean standard (16kg) of marketing sheep of all developed countries in1992. At last, a conclusion was put forward that Charolai was the optimum paternity for Hebei fine wool sheep commercial cross breeding.更多还原