饲喂含无患子皂甙的精料对6～9月龄后备牛生产性能、营养物质消化率及血液生化指标的影响

Effects of feeding sapindoside-containing concentrate on productive performance,utilization of nutrients and blood biochemical indexes in 6-9 month-old heifers

选取24头6月龄的健康中国荷斯坦后备奶牛,平均体质量（116.02±6.92）kg,采用配对设计分为2组,对照组和试验组分别饲喂含量为0、0.15%的无患子皂甙的精料,试验期101d,其中预饲期10d,试验末期进行消化代谢试验并采集血液。结果显示,饲喂含无患子皂甙的精料后,后备牛的日增重（P〈0.01）、体高（P〈0.01）、饲料转化效率（P〈0.01）、粗蛋白（P〈0.05）的表观消化率显著提高,每头牛的饲料成本下降2.3元,提高了企业的经济效益,同时血液中葡萄糖浓度和胆固醇浓度升高（P〈0.05）,谷丙转氨酶和总胆红素浓度降低（P〈0.01）。结果表明,饲喂含无患子皂甙的精料能显著提高6-9月龄后备牛的生产性能,增加企业的经济效益,无患子皂甙可能是一种具有较大应用前景的环境友好型瘤胃调控剂。

The study was conducted to investigate the effects of sapindoside-containing concentrate on productive performance,utilization of nutrients and blood biochemical indexes in 6-9month-old heifers.Twenty-four 6-month-old healthy Chinese Holstein heifers（116.02±6.92）kg were used in a paired design and the total period lasted 101 days.The animals were assigned to two treatments：basal diet without（control）or with 0.15%sapindoside（powder of 80%triterpenoid saponins）in concentrate.At the last week of the trial,6heifers were randomly selected in the control and sapindoside-containing groups,and subjected to a digestion trial by index method with acid insoluble ash as index.The samples of blood were collected at the last day of the trial.Results showed that：compared with the control group,average daily weight gain（P〈0.01）,body height（P〈0.01）,heart girth（P〈0.10）,feed efficiency（P〈0.01）and apparent total tract digestibility of CP（P〈0.05）increased in the sapindoside-containing group,improving economic benefits.Sapindoside-containing concentrate increased the concentrations of glucose and total cholesterol（P〈0.05）,and decreased the concentration of alamine aminotransferase and total bilirubin（P〈0.01）in blood.In summary,feeding sapindoside-containing concentrate significantly improved the productive performance of6-9month-old heifers.So it has a good application prospect in ruminant production.