不同营养水平日粮对杂交羔羊育肥效果的影响

Effect of the different nutritional level diets on fattening performance of crossbred lambs

为研究不同营养水平日粮对羔羊育肥效果的影响,选择60只体重相近、健康的、90日龄左右的断奶杂交羔羊,随机分为4组,分别饲喂不同营养水平试验日粮。结果表明:日粮营养水平直接影响到育肥效果。在合适范围内随着日粮营养水平的增加,育肥效果也有所提高。试验Ⅰ组羔羊日增重比对照组提高了29.01%,差异极显著(P<0.01),试验Ⅱ组、Ⅲ组羔羊日增重分别比对照组提高了18.96%、13.27%,差异显著(P<0.05);试验Ⅰ组的屠宰率、净肉率、眼肌面积分别比对照组提高了13.19%、15.23%、31.33%,差异极显著(P<0.01);试验Ⅰ组只均收入比对照组提高了38.90%,差异极显著(P<0.01);试验Ⅱ组、Ⅲ组的只均收入分别比对照组提高了24.59%、18.09%,差异显著(P<0.05)。试验Ⅰ组育肥效果优于试验Ⅱ组、试验Ⅲ组。

In order to study the effect of the different nutritional level diets on fattening performance of lambs, 60 crossbred lambs of similar weight, healthy and about 90 days old were selected and randomly divided into 4 groups. The results showed that the nutritional level of diet influenced the fattening effect directly. The fattening effect was also improved with the increase of dietary nutrient level in proper range. The daily gain of lambs in group Ⅰ was increased by 29.01% compared with that of control group(P<0.01). The daily gain of lambs in Group Ⅱ and Group Ⅲ was 18.96% and 13.27% respectively compared with that of control group(P<0.05), the dressing rate, meat percentage and eye muscle area of Group Ⅰ increased by 13.19%, 15.23% and 31.33% respectively, and the difference was significant(P<0.01) The average income of Group Ⅱ and Group Ⅲ was 24.58% and 18.09% higher than that of control group(P<0.05). The fattening effect of Group Ⅰ was better than that of Group Ⅱ and Group Ⅲ.