不同改良代次的西门塔尔公牛育肥效果比较

Comparison of Fattening Effects of Different Improved Generations of Simmental Bulls

为比较不同改良代次的西门塔尔公牛育肥效果。选择30头西门塔尔公牛作为研究对象,分为杂交F1组、杂交F2组、杂交F3组,每组各有10头,试验周期为115 d。杂交F3组料重比显著低于杂交F1组和F2组(P<0.05);杂交F3组平均日增重略高于杂交F1组和F2组,但差异不显著(P>0.05)。杂交F3组耆甲高、胸围均显著小于杂交F1组和F2组(P<0.05);杂交F3组十字部高显著高于杂交F1组(P<0.05),但与杂交F2组差异不显著(P>0.05);杂交F3组体斜长显著大于杂交F2组(P<0.05),但与杂交F1组差异不显著(P>0.05)。杂交F3组日增重价值、日增重效益均显著高于杂交F1组和F2组(P<0.05)。杂交改良F3代次西门塔尔公牛具有更佳的育肥效果,这为今后西门塔尔公牛的遗传育种改良和改善生长性能提供了参考依据。

To compare the fattening effects of different improved generations of Simmental bulls.The 30 Simmental bulls were selected as the research subjects and divided into hybrid F1 group,hybrid F2 group,and hybrid F3 group,with 10 bulls in each group.The experimental period was 115 days.The feed to weight ratio of the hybrid F3 group were significantly lower than those of the hybrid F1 and F2 groups(P<0.05);The average daily weight gain of the hybrid F3 group was slightly higher than that of the hybrid F1 and F2 groups,but the difference was not significant(P>0.05).The height and chest circumference of the hybrid F3 group were significantly lower than those of the hybrid F1 and F2 groups(P<0.05);The cross height of the hybrid F3 group was significantly higher than that of the hybrid F1 group(P<0.05),but there was no significant difference compared to the hybrid F2 group(P>0.05);The oblique length of the hybrid F3 group was significantly longer than that of the hybrid F2 group(P<0.05),but there was no significant difference compared to the hybrid F1 group(P>0.05).The daily weight gain value and benefits of the hybrid F3 group were significantly higher than those of the hybrid F1 and F2 groups(P<0.05).Hybrid improvement of F3 generation Simmental bulls has a better fattening effect,which provides a reference basis for genetic breeding and improving growth properties of Simmental bulls in the future.