【摘要】 为了测定松针与苜蓿混合青贮对羔羊的生长性能和屠宰性能的影响,选择50只体重相近的哈萨克公羔羊,随机分为5组,各组日粮精粗比为50∶50,混合青贮饲料占粗饲料的70%。松针在混合青贮(鲜重基础)中的比例分别为0%(Ⅰ组)、5%(Ⅱ组)、10%(Ⅲ组)、20%(Ⅳ组)、30%(Ⅴ组)。结果表明:(1)羔羊平均日增重随苜蓿混合青贮中松针比例的提高而逐渐降低,Ⅰ、Ⅱ组平均日增重显著高于Ⅴ组(P<0.05),Ⅲ、Ⅳ组与Ⅴ组差异不明显(P>0.05)。各组间干物质采食量无显著差异(P>0.05)。Ⅰ、Ⅱ组料重比显著低于Ⅴ组(P<0.05),Ⅲ、Ⅳ组与Ⅴ组差异不明显(P>0.05)。(2)Ⅰ、Ⅱ、Ⅲ、Ⅳ组间胴体重、屠宰率、净肉重、净肉率和肉骨比无显著差异(P>0.05),且均显著高于Ⅴ组(P<0.05)。各组间羔羊的眼肌面积没有受到影响(P>0.05)。结果提示,在本试验条件下,用松针与苜蓿混合青贮饲喂羔羊是可行的,但混合青贮中松针的比例不应超过20%。更多还原

【Abstract】 To evaluate the effect of pine needles and alfalfa mixed silage on growth and slaughter performence of lambs, fifty male Kazakh lambs were divided into 5 groups by similar body weight. Lambs were fed diets with a 50:50 concentrate to roughage ratio, mixed silage was 70% in roughage feed(dry matter basis).The percentage of pine needles in mixed silage(fresh matter basis) were 0(group Ⅰ),5%(group Ⅱ),10%(group Ⅲ),20%(group Ⅵ),30%(group Ⅴ), respectively.The results showed(1) with the increasing ratio of pine needles, average daily gain(ADG) of lambs gradually decreased.ADG in group Ⅰ and group Ⅱ were significantly higher than group Ⅴ(P<0.05),with ADG in groups Ⅲ,Ⅳ,Ⅴ having no significant difference(P>0.05). Dry matter intake(DMI) showed no significant difference among the five groups(P>0.05). The ratio of feed to gain(F/G) in group Ⅰ,Ⅱ were significantly lower than group Ⅴ(P<0.05),but F/G in groups Ⅲ,Ⅳ,Ⅴ had no significant difference(P>0.05).(2)Carcass weight, slaughter rate, meat weight, meat percentage and ratio of meat to bone in group Ⅰ,Ⅱ,Ⅲ,Ⅳ were significantly higher than group Ⅴ(P<0.05),but there was no significant difference between the four groups(P>0.05).Eye muscle area(EMA) was not affected by addition ratio of pine needles in mixed silage(P>0.05).In conclusion, under this experiment conditions, it is feasible to feed lamb by using pine needles and alfalfa mixed silage. However, the proportion of pine needles in mixed silage should not exceed 20%.更多还原