肉鸡日粮添加叶酸、烟酸、维生素 C 增重效果观察

Effects of supplementary Folic Acid,Niacin and Vitamin C on Weight Gain of Broiler Chicken Fed on Corn-soybean Diet

玉米——豆饼型肉鸡日粮中叶酸、烟酸含量都较低,可能是制约肉鸡快速生长的重要因素之一,故此在吴忠东风鸡场开展向以玉米和豆饼为主要日粮成分的肉鸡饲料中以不同配方与剂量组合添加叶酸、烟酸和 Vc 的试验研究。3组鸡数均为 AA(36日龄)81只,试验期35天。结果(用药量 mg/kg):叶酸0.5+Vc5增重19.5%(p<0.01),叶酸0.25+Vc5+烟酸2.5组增重17.1%(p<0.01),效果均极显著;叶酸0.25+Vc5增重3.5%。料肉比:对照组2.82,叶酸0.5+Vc5为2.36,叶酸0.25+Vc5+烟酸2.5为2.46,叶酸0.25+Vc5为2.66,均较对照组有不同程度的降低。本试验及作者此前开展的类似研究均表明 NRC 关于肉仔鸡的叶酸、烟酸推荐需要量似乎偏低,应向玉米——豆饼型日粮中适量补加这2种维生素。

The content of folic acidvand niacin in meal of broiler chickens fed on Corn ～soybean die was relatively low and this probably was one of the main factors that stunted fast growth of broiler chicken.So we made an experiment at Dongfeng chicken farm in Wuzhong adding folic acid,niacin and Vitamin C of varions formulations and rates to meal of broiler chickens fed on corn～soybean diet.3groups of'AA'broiler chickens of 36 days,81 chickens in each growp,were tested for 35 days.The results show that the first group fed on the diet with folic acid(0.5mg/kg)+VC(5mg/kg)got a weight increase of 19.5%(P<0.01); The second group with folic acid(0.25mg/kg)+VC(Smg/kg)+niacin(0.25mg/kg)got a weight increase of 17.1%,both effects are significant,the third group with folic acid(0. 25mg/kg)+Vc(5mg/kg)got a weight in crease of 3.5%.The feed conversion rates were 2. 82:1for control,2.36:1,2.46:1 ,and 2.66:1 for the first,second and third group respective- ly,All had a decreease of different extent.The experiment and similar studies previously made by authors all show that necessary folic acid and niacin content in the diet for broiler chickens recommeneded by NRC seems to be lower and a proper quantity of the two kinds of vitamin should be added to corn～soybean ration.