63～105日龄雌性皖南三黄鸡代谢能和粗蛋白质需要量的研究

摘要

[目的]研究63～105日龄雌性皖南三黄鸡维持和增重的代谢能(ME)及粗蛋白质(CP)需要量,为其饲养标准的制订提供参考数据.[方法]选取128只63日龄雌性皖南三黄鸡随机分为4组,每组4个重复,每个重复8只,单独笼养,分别饲喂100％,80％,60％和40％(接近维持需要)自由采食量的日粮,105日龄屠宰,运用比较屠宰法评估ME和CP维持需要量.选取48只63日龄雌性皖南三黄鸡随机分为6组,每组8只,单独笼养,自由采食,分别于70,77,84,91,98和105日龄屠宰,测定体粗蛋白质和体能量含量,计算增重的ME和CP需要量.[结果]63～105日龄雌性皖南三黄鸡每千克代谢体质量维持ME需要量为357.50 kJ,CP为1.61 g,体质量每增加1gME需要量为64.40 kJ,CP需要量为1.20g.[结论]确定了63～105日龄雌性皖南三黄鸡ME、CP的日需要量分别为792.30kJ和11.53 g,饲粮的ME、CP营养需要量分别为10.60MJ/kg和15.42％.%[Objective] This experiment was conducted to study the requirement of crude protein (CP) and metabolizable energy (ME) of female Wannan three-yellow chicks format the age of 63 to 105 days.[Method] A total of 128 63-day-old female Wannan three-yellow chicks with similar body weigh were randomly divided into four feed levels (100％,80％,60％ and 40％ libitum consumption) with four replicates each level and 8 chicks each replicate.Chicks were slaughtered at the age of 105 days and requirements of CP and ME were determined by the comparative slaughter method.A total of 48 63-day-old female Wannan three yellow chicks were randomly distributed into 6 groups with 8 chicks in each group and were fed on libitum.Eight chicks were slaughtered at the ages of 70,77,84,91,98,and 105 days,respectively,and their body CP and body energy were measured for the calculation of ME and CP requirements.[Result] For 63105-day-old female Wannan three-yellow chicks,maintenance requirements of ME and CP were 357.50 kJ/kg body weight and 1.61 g/kg body weight,respectively.Weight gain requirements of ME and CP were 64.40 kJ/g and 1.20 g/g,respectively.[Conclusion] The ME and CP daily requirements of female Wannan three-yellow chicks at the age of 63 to 105 days were 792.30 kJ and 11.53 g,and dietary ME and CP requirements were 10.60 MJ/kg and 15.42％.