育成期日粮蛋白质和能量水平对农大3号节粮小型蛋鸡生长性能及产蛋高峰期产蛋性能的影响

Effect of different dietary protein and energy levels on growth performance during incubation period and egg production rate at laying peak of dwarf layer

试验选用84日龄农大3号节粮小型蛋鸡540只,采用3×3因子试验设计,随机分成9个处理,每个处理5个重复。蛋白质水平分别为15%、16%、17%,代谢能水平分别为11.50、11.70、11.91 MJ/kg,旨在研究不同蛋白质和代谢能水平对农大3号节粮小型蛋鸡育成期(13～18周龄)生长以及产蛋高峰期(27～30周龄)产蛋率的影响。结果表明:育成期日粮蛋白质和能量水平对农大3号节粮小型蛋鸡生长性能和产蛋率影响差异不显著(P>0.1)。但二者存在交互作用,日粮蛋白质水平17%、能量水平11.91 MJ/kg处理组提高了育成期增重,并降低了料肉比。总之,同时提高育成期日粮蛋白质和能量水平能改善农大3号节粮小型蛋鸡群体均匀度,对生长具有积极作用。

The effect of different dietary protein and energy levels on performance during incubation period （13-18 week） and egg production rate at laying peak period（27-30 week） was studied with 540 84- day-old dwarf layer in a 3×3 factorial experiment design. The chicks were randomly assigned to nine groups, each group had five replicates. Three protein levels were 15%, 16%, 17% respectively; three energy levels were 11.50, 11.70, 11.91 MJ/kg respectively. The result suggested that the performance and egg production rate were not significantly influenced by the levels of protein and energy（P〉0.1）. But there is the interaction between the levels of protein and engergy, inclusion of 17% protein and 11.91 MJ/kg energy supplemental increased the weight gain of incubation period, and decreased feed conversion ratio. In a word, enhancing the ration of protein and energy level during incubation period at the same time could improve uniformity and has positive effects on growth.