【摘要】 本次试验用我们所研制的犊牛开食料进行了犊牛早期断奶,并对犊牛生长发育进行了对比试验研究。将黑白花犊牛分为试验组(早期断奶组)和对照组(常规断奶组)。试验组哺乳期为10～42日龄,育成期为43～91日龄。对照组哺乳期为10～91日龄。两组观察期为92～182日龄。犊牛开食料的干物质含量为91.6％、粗蛋白质为20.52％、粗纤维为3.87％。在10～42日龄时平均日增重试验组为606.77g、对照组为518.49g,两组间差异显著(P<0.05);在43～91日龄时平均日增重试验组为1019.78g。对照组为821.09g,组间差异显著(P<0.05);在整个试验期(10～91日龄)的日增重试验组均高于对照组,差异显著(P<0.05)。体尺各部位增长试验组均高于对照组,尤其是腹围增长较快,10～42日龄时组间差异显著(P<0.05),可见早期断奶犊牛反刍胃的发育得到了明显提前。182日龄时,试验组体重为204.5kg、对照组为199.0kg,两组牛平均日增重较接近,差异不显著(P>0.05)。更多还原

【Abstract】 In this trial, we studied the growth and development pattern of early weaning and traditional weaning calf, 10 days aged calvies were devided into two groups,The experimental group(early weaning) and the control group(traditional weaning). The experimental group was weaned at the age of 42 days. and fed"calf starter" after weaning while the control group was fed milk and weaned at the age of 91 days. The Calf Starter we prepared contains.91.6% of Dry Matter, 20.52% of Crude protein and 3.87% of Crude Fibre. We observed calf growth and development and found: During the age of 10～42 days the mean daily weight gain of calf was 606.77g/day with the experimental group and 518.49g/day with the control group, the difference was significant(P<0.05):During the age of 43～91 days, the mean daily weight gain was 1019.78g/day with the experimental group and 821.09g/day with the control group, the diff erence was also significant(P<0.05).In the whole period(10—91days), the weight gain of experimental group was higher than that of control group, and had significant difference (P<0.05). On the other hand, body size growth of experimental group calf was also higher than that of the control group calf, especially in the heart girth growth and there was significant difference between the two groups in heart girth during the age of 10—42days(P<0.05),this showed that the rumen development of early weaning calf was moved up. At the age of 182 days,the weight of the calf was 204.5kg with the experimental group and 199.0kg with the control group and the differrence was not significant(P>0.05).更多还原