不同营养水平日粮中添加活性酵母制剂对肉牛生产性能和经济效益的影响

发布时间：2018-04-20 06:09

本文选题：活性酵母 + 肉牛　；参考：《中国畜牧杂志》2017年10期

【摘要】：本试验旨在研究不同营养水平日粮中添加活性酵母制剂对肉牛生产性能和经济效益的影响。选用30头(545.9±18)kg法系夏洛来牛,按照体重随机分为3组,每组10头,分别为对照组、高营养组和低营养组。对照组饲喂高营养日粮,高营养组饲喂高营养日粮的同时添加20 g/(头·d)活性酵母产品,低营养组饲喂低营养日粮同时添加20 g/(头·d)活性酵母产品。结果表明:高营养组日增重最高,达1.56 kg/d,低营养组日增重最低,为1.30 kg/d,但高营养组与低营养组的营养物质表观消化率及日粮利用率均高于对照组。对照组和高营养组试验全期的可消化干物质与粗蛋白摄入量显著高于低营养组(P0.05),而低营养组可消化干物质与增重比、可消化蛋白与增重比均低于对照组和高营养组,但各组间无显著差异(P0.05)。因此,日粮中添加活性酵母产品可提升育肥牛饲料转化率,从而降低饲养成本,增加经济效益,且低营养日粮中添加活性酵母制剂提升日粮营养利用率的效果更佳。在本试验条件下,高营养日粮中添加20 g/(头·d)活性酵母产品增重效益最大,与对照组相比每天每头牛可多增重0.21 kg。
[Abstract]:The purpose of this experiment was to study the effect of adding active yeast preparation into diets with different nutritional levels on the performance and economic benefit of beef cattle. A total of 30 calorai cattle (545.9 卤18)kg) were randomly divided into 3 groups according to their body weight: control group, high nutrition group and low nutrition group. The control group was fed with high nutrition diet, the high nutrition group was fed with high nutrition diet and 20 g / (head d) active yeast product was added, and the low nutrition group was fed with low nutrition diet and 20 g / (head d) active yeast product. The results showed that the daily gain of high nutrition group was the highest (1.56 kg / d), and that of low nutrition group was the lowest (1.30 kg / d), but the apparent digestibility and dietary utilization rate of high and low nutrition groups were higher than that of control group. The intake of digestible dry matter and crude protein in control group and high nutrition group was significantly higher than that in low nutrition group (P 0.05), while the ratio of digestible dry matter to weight gain, digestible protein and weight gain in low nutrition group were lower than those in control group and high nutrition group. But there was no significant difference among the groups (P 0.05). Therefore, adding active yeast products to the diet can increase feed conversion rate, reduce feeding cost and increase economic benefit, and the effect of adding active yeast preparation to low nutrition diet can improve the nutrient utilization ratio of diet is better. Under the experimental conditions, 20 g / (head d) active yeast products added to the high nutrition diet had the greatest gain in weight gain. Compared with the control group, the weight gain per cow per day was 0.21 kg more than that in the control group.
【作者单位】：广东溢多利生物科技股份有限公司;
【基金】：农业部公益性行业(农业)专项(201503134)
【分类号】：S823.5

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