不同糖源对肉用犊牛生长性能、体尺指数及营养物质表观消化率的影响

发布时间：2018-10-05 14:08

【摘要】：试验旨在研究不同糖源代乳料对肉用犊牛生长性能、体尺指数及营养物质消化率的影响。选取20头新生黑安格斯犊牛,随机分为4组,每组5头。对照组随母牛饲喂,A、B、C组分别饲喂以葡萄糖、乳清粉和熟化玉米粉为主要糖源的代乳粉,30日龄时开始正式试验,试验期为45d。分别在犊牛30、45、60、75日龄时进行空腹称重,测量体尺,每天观察记录犊牛的腹泻情况。在35~43和65~73日龄进行两期消化试验,采集样品,测定表观消化率。结果显示,试验前期不同糖源对各试验组犊牛影响明显,30~45日龄时C组平均日增重显著低于A、B组(P0.05),并极显著低于对照组(P0.01),A组日增重显著低于对照组和B组(P0.05);C组DM表观消化率显著低于A、B组(P0.05);CP表观消化率显著低于A组(P0.05),极显著低于B组(P0.01);犊牛腹泻率在这一时期也偏高。45日龄后这种影响逐渐减小,A、B组犊牛日增重开始增加,与对照组差异不显著(P0.05),C组犊牛生长速度也快速增加,到75日龄时平均日增重与A组差异不显著(P0.05);第二期消化试验中各试验组犊牛营养物质的表观消化率均明显提高,犊牛腹泻率也开始降低,试验后期降至为0。而在整个试验期不同糖源对各组的体尺及体尺指数影响不大。综上,在试验中乳糖效果最好,葡萄糖次之,熟化玉米粉则在前期效果不佳,但随着犊牛日龄的增加效果逐渐改善。
[Abstract]:The purpose of this study was to study the effects of different sugars on growth performance, body size index and nutrient digestibility of meat calves. Twenty newborn black Angus calves were randomly divided into 4 groups with 5 calves in each group. The control group was fed with the main sugar source of glucose, whey powder and corn flour respectively, and the formal test was started at the age of 30 days. The trial period was 45 days. The calves were weighed on an empty stomach at the age of 30 ~ 45 and 60 ~ 75 days. The body size was measured and the diarrhea of calves was recorded every day. Two phase digestibility tests were carried out at the ages of 35 ~ 43 and 65 ~ 73 days to determine the apparent digestibility. The results show that The effect of different sugar sources on the average daily gain of group C was significantly lower than that of group A (P0.05), and that of group A was significantly lower than that of group A (P0.01). The apparent digestibility of DM in group C was significantly lower than that in group B (P0.05). The apparent digestibility of CP was significantly lower than that of group A (P0.05), and significantly lower than that of group B (P0.01). There was no significant difference between group C and control group (P0.05). The growth rate of calves in group C also increased rapidly, and the average daily gain at 75 days was not significantly different from that in group A (P0.05). The diarrhea rate of calves also began to decrease to 0. However, different sugar sources had little effect on body size and body size index during the whole trial period. In conclusion, lactose was the best in the experiment, glucose was the second, and corn flour was not good in the early stage, but the effect was improved gradually with the increase of calves' age.
【作者单位】：石河子大学动物科技学院;新疆农垦科学院畜牧兽医研究所;新疆西部牧业股份有限公司;
【基金】：新疆兵团重大科技项目(2014AA001)
【分类号】：S823.5

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