不同精料添加量对藏系绵羊的育肥效果

Fattening effect of different concentrate supplementing levels on Tibetan sheep

按对等原则将 24 只藏系羯羊(1.5 岁)分为Ⅰ、Ⅱ、Ⅲ三个处理组,分 150g/(只·d)、300g/(只·d)、450g/(只·d)三种精料添加水平,自由采食燕麦青干草,以研究不同精料添加量对藏羊生产性能的影响。试验结果表明,三组藏羊全期平均日增重分别为(74.38±19.10)、(156.70±25.23)、(169.33±34.45) g,Ⅱ组、Ⅲ组极显著高于Ⅰ组(P<0.01),而Ⅱ组与Ⅲ组间差异不显著(P>0.05);育肥后期各处理组日增重均呈现下降趋势。在本试验的日粮条件下,每天饲喂 300 g 精料时的饲料转化率最高。

castrated Tibetan sheep which were randomly divided into three treatments (groupⅠ, groupⅡand groupⅢ) were adopted to investigate the effect of different concentrate levels (150,300,450g/d) on production performance. The experimental diets were composed of mixed concentrate and chopped oat hay. The results indicated that average daily gain (ADG) of three groups were 74.38±19.10, 156.70±25.23,169.33± 34.45g respectively. ADG of groupⅡand Ⅲ were higher than that of groupⅠ, respectively (P<0.01). There was no significant difference (P>05) between groupⅡand group Ⅲ. ADG of three groups decreased during the latter fattening period. The feed efficiency showed the highest at 300g/d concentrate level.