【摘要】 选用 5月龄河北细毛羊和德美 (德国肉毛兼用美利奴 )与河北细毛羊杂交一代羔羊各 2 4只 ,按体重分成 3组 ,研究不同肥育方式对其生长性能的影响。结果表明 ,在放牧条件下 ,断奶羔羊补饲适量混合精料 ,日增重提高显著 (P<0 .0 1 )。同时能显著提高当年青年母羊的发情和配种率。试验结束后 ,选用 4只 8月龄河北细毛羊和德美杂交一代羊进行屠宰 ,比较不同肥育方式对羊胴体品质的影响。结果表明 ,补饲可显著地 (P<0 .0 1 )提高胴体重 ,屠宰率、净肉率和眼肌面积也有不同程度的改善。但品种间差异不显著 (P>0 .0 5)更多还原

【Abstract】 s The objectives of this study were to determine the effect of different forms of fattening ways on lamb performance and carcass characteristics.In experiment I,twenty four Hebei or cross of Hebei to Merino(German)lambs (30.2 kg BW)were used in a 2×3 factorial arrangement. The results showed that under the condition of pasture ,lamb performance with supplemental diet (ADG, average daily gain) were improved significantly (P<0.001) compared with lamb fattened by means of pasture only. There was no greater (P>0.05)effect of lamb kinds on its performance. Moreover,Young wethers provided by supplemental diet were superior to wethers fattened with pastured only in reproduction performance. In experiment Ⅱ, four Hebei or cross of Hebei to Merino(German)lambs were selected in a 2×2 factorial arrangement. It is showed that lambs’ empty body gain with supplemental diet were improved effectively(P<0.001) compared with lambs’ pastured only. At the same time,other carcass characteristics (such as slaughter rate)were improved at some extent. However, there were no obvious effects of kinds on lambs’carcass characteristics. [WT5”HZ]更多还原