0-3及4-6周龄肉仔鸡日粮能量及蛋白质沉积效率参数研究  

Study on the Parameters of Efficiencies of Energy and Protein Deposition in Broilers Between 0-3 and 4-6 Weeks

作　　者：李勇[1] 蔡辉益[1] 刘国华[1] 杨志刚[1] 常文环[1] 张姝[1] 

机构地区：[1]中国农业科学院饲料研究所,北京100081

出　　处：《中国农业科学》2010年第17期3624-3632,共9页Scientia Agricultura Sinica

基　　金：农业部“948”计划项目(2008-Z4)

摘　　要：【目的】研究0—3及4—6weeks肉仔鸡每日摄入不同能量及蛋白质水平的日粮对体蛋白及体脂肪沉积的影响,旨在确定不同阶段日粮能蛋比对肉仔鸡日粮蛋白质沉积为体蛋白效率的影响和不同阶段日粮能量以蛋白质形式及脂肪形式沉积的效率。【方法】饲养试验1、2分别于肉仔鸡0—3weeks、4—6weeks进行。两个试验设计相似,分别于0、21日龄选取体重相近的爱拔益加(AA)肉仔鸡432只,按性别及采食日粮不同随机分为24个处理,每个处理3个重复,每个重复6只鸡。肉仔鸡每日限量饲喂,饲喂水平分别为正常采食量的95%、80%、65%、50%,每日定量供给肉仔鸡高、中、低3个水平的高蛋白基础日粮及由饲喂水平决定的定量淀粉,进而使肉仔鸡每日采食能蛋比(代谢能/粗蛋白)不同的12种日粮。每个试验,试验初和试验末分别进行屠宰试验,以测定肉仔鸡体成分。【结果】(1)0—3weeks肉仔鸡日粮蛋白质沉积为体蛋白的效率(ep)随能蛋比的增加呈线性增加,当能蛋比达到69.28MJ·kg-1时,公母鸡ep分别达到最大值0.64和0.63,之后保持稳定;(2)4—6weeks肉仔鸡ep随能蛋比的增加线性增加,当能蛋比达到69.28MJ·kg-1时,公母鸡ep分别达到最大值0.58和0.56,之后保持稳定;(3)能蛋比相同时,0—3weeks肉仔鸡ep大于4—6weeks肉仔鸡ep;(4)0—3weeks公母肉仔鸡日粮能量沉积为体蛋白的效率分别为0.72和0.68,沉积为体脂肪的效率分别为0.59和0.65,公母肉仔鸡沉积每克蛋白质分别需要能量32.88kJ和34.82kJ,沉积每克脂肪分别需要能量66.43kJ和60.12kJ;(5)4—6weeks公母肉仔鸡日粮能量沉积为体蛋白的效率分别为0.70和0.65,沉积为体脂肪的效率分别为0.75和0.81,公母肉仔鸡沉积每克蛋白质分别需要能量34.04kJ和36.38kJ,沉积每克脂肪分别需要能量52.12kJ和48.32kJ。【结论】公母肉仔鸡日粮蛋白质沉积为体蛋白的效率及日粮能量以体蛋白及体脂肪沉�【Objective】 Two trials were conducted to investigate the effects of varying energy and protein intakes on the performance,body protein deposition and body fat deposition in broilers between 0-3 weeks and 4-6 weeks in order to identify the relationships between efficiency of protein utilization for body protein deposition（ep） and energy/protein ratio and the efficiencies of energy utilization for protein and fat deposition in broilers between 0-3 weeks and 4-6 weeks.【Method】 The two trials with similar design were conducted during 0-3 weeks and 4-6 weeks,respectively.At 1day and 21 days of age,four hundred and thirty-two Arbor Acres（AA） broilers with similar body weight were respectively randomly arranged into 24 treatments with 3 replicates of 6 chicks by sex and diets.In each trial,broilers were fed with 95%,80%,65% and 50% restriction of ad libitum intake,respectively.Each day,broilers were supplied with three allowances of high-protein basal feed and appropriate amount of starch which were determined by 4 feeding levels.Thus,12 diets with different energy/protein ratios were formed.At the beginning and the end of each trial,broilers were killed,and the body compositions were determined.【Result】 The results showed that with the increase of energy/protein ratio,the efficiencies of protein utilization for body protein deposition in broilers between 0-3 weeks increased linearly.When the energy/protein ratio reached 69.28 MJ·kg-1,the eps of male and female broilers attained their maximum values of 0.64 and 0.63,respectively,then kept constant.With the increase of energy/protein ratio,the eps of broilers between 4-6 weeks increased linearly.When the energy/protein reached 69.28 MJ·kg-1,the eps of male and female broilers attained their maximum values of 0.58 and 0.56,respectively,then kept constant.When the energy/protein ratio was the same,the eps of male and female broilers were higher during the 0-3 weeks than during the 4-6 weeks.During the 0-3 weeks,the efficiencies of energy utilization f

关 键 词：肉仔鸡 能量 蛋白质 沉积效率 

分 类 号：S831.5[农业科学—畜牧学]