复方中草药替代抗生素对肉鸡生产性能及物质代谢的影响

Effect of Compound Chinese Herbal Medicinal Feed Additive Substituting Antibiotics on Performance and Metabolism of Broilers

以肉鸡为研究对象，采用单因子随机分组设计，将300羽1日龄肉鸡随机分成4组，每组5个重复，每重复15只（86，79）。组Ⅰ为基础饲料＋1％组方1、组Ⅱ为基础饲料＋1％组方2、组Ⅲ为基础饲料＋1％组方3、组Ⅳ为基础饲料＋泰乐菌素为对照组。结果表明：复方中草药添加剂各组的日增重在前期与抗生素组差异不显著（P〉0．05），但中草药添加剂组对日增重的影响呈上升趋势，尤以组Ⅱ最明显，在36～42日龄，组Ⅱ的日增重高于抗生素组，且差异显著（P〈0．05）。在物质代谢方面，组方1在促进干物质代谢率、粗脂肪代谢率、粗灰分代谢率与对照组无显著差异，组方2在促进粗蛋白代谢率的作用略优于对照组，组方3在促进干物质代谢率、粗脂肪代谢率与对照组无差异显著。在肉鸡的生产中，合理的复方中草药可以替代抗生素添加剂。

The test adopted random control design,300 broilers were randomly divided into basal diet ＋ 1% formula 1 （ group Ⅰ ） , basal diet ＋ 1% formula 2 （ group Ⅱ）, basal diet ＋ 1% formula 3 （ group Ⅲ） and basal diet ＋ Tylosin （control） ,5 replicates in each group and 15 chickens in each replicate（ 8 males and 7 females）. The results showed that the average daily gains （ADG）of 15 ～ 35 days of age were not significantly different in group Ⅰ ＇ Ⅱ ＇ Ⅲ＇ and control（P 〉0.05）. However there was an uptrend in the average daily gains （ADG） of 15 ～ 35 days of age in the experimental group. The daily weight gain of Group Ⅱ was significantly higher than that of the control （ P 〈 0.05 ） in 36 ～ 42 days of age. The metabolic rates of nutrients were not significantly different in each group （ P 〉 0.05 ）. The mtabolic rate of crude protein of the two trial groups was slightly better than that of the control group. Formula 3 showed no significant difference in dry matter metabolic rate, fat metabolic rate and phosphorus metabolic rate （ P 〉 0.05）. Chinese herbal medicine can replace antibiotic for feed additives in the poultry industry.