【摘要】 选用同一头黑白花种公牛与初产秦川母牛杂交产下的28头犊牛(产期接近)为试验牛,随机分为4组(试验1、试验2、试验3、试验4),每组7头。试验1饲喂本场加工的犊牛精饲料,试验2、3、4组,在饲喂本场加工的犊牛精饲料基础上,另在每千克饲料中分别添加VB120.48mg、钴0.48g、钴和VB12各0.48g。试验结果表明:日增重,试验1与试验4相比差异极显著(P<0.01),试验1分别与试验2、试验3相比差异显著(P<0.05),试验4组分别与试验2、试验3组相比差异显著(P<0.05);试验2与试验3相比差异不显著(P>0.05)。更多还原

【Abstract】 The study was conducted with 28calf which were descendant of Blackand W hite bull cross m ating Qinchuan cow. 28calf were divided into four groups,which were fed base diet(trial1),adding 0.48m g VB12 in base diet(trial2),adding 0.48m g VB12Cobalt in base diet (trial3), adding 0.48m g Cobalt and 0.48m gVB12 inbase diet(trial4)respectively.The results showed that average daily gain of the fourthgroup was significantly higher than that of feeding base diet (P<0.01); the averagedaily gain of feeding base diet was lower than that of the second and third groupsrespectively(P<0.05);the average daily gain of fourth group was higher than that ofthe second and third groups respectively (P<0.05); the average daily gain had nodifference between the second group and third group(P>0.05).更多还原