低粗蛋白质日粮对长天龄三黄肉鸡生产性能及养殖效益的影响  

Effect of Low Crude Protein Diet on the Production Performance and Culture Benefit of Long Days Three-yellow Chicken

作　　者：余南才 苏志军 秦开田 姚武群 谭会泽[2] 刘闯 魏师 余永杰[3] 

机构地区：[1]广东省新兴县稔村温氏家禽有限公司农业部动物营养与饲料学重点实验室,广东新兴527422 [2]广东温氏食品集团股份有限公司农业部动物营养与饲料学重点实验室,广东新兴527400 [3]华南农业大学动物科学学院,广东广州510642

出　　处：《畜牧与饲料科学》2015年第2期36-40,共5页Animal Husbandry and Feed Science

摘　　要：为评价饲喂低粗蛋白质日粮对长天龄三黄肉鸡生产性能及养殖效益的影响,分别开展了试验场试验与养殖户试验。于试验场选取长天龄三黄肉鸡1 600只,随机分为4组（对照组、试验1组、试验2组和试验3组）,每组2个重复,每个重复200只鸡。对照组和各试验组雏鸡阶段（1~35天龄）及成鸡阶段（76天龄~上市）均饲喂常规日粮,对照组中鸡阶段（36~75天龄）饲喂粗蛋白质含量为17%的日粮,试验1组、试验2组及试验3组中鸡阶段（36~75天龄）分别饲喂粗蛋白质含量为14%、12%及10%的低粗蛋白质日粮,各组日粮的可消化必需氨基酸含量一致。选取长天龄三黄肉鸡养殖户8家,随机分成4组（对照Ⅰ组、对照Ⅱ组、试验Ⅰ组和试验Ⅱ组）,每组2家养殖户,每家存栏8 000只鸡。对照组和试验组雏鸡阶段（1~35天龄）及成鸡阶段（76天龄~上市）均饲喂常规日粮,对照组中鸡阶段（36~75天龄）饲喂粗蛋白质含量为17%的日粮,试验Ⅰ组和试验Ⅱ组中鸡阶段（36~75天龄）饲喂粗蛋白质含量为14%的低粗蛋白质日粮,各组日粮的可消化必需氨基酸含量一致。其中,对照Ⅰ组、试验Ⅰ组限量饲喂,对照Ⅱ组、试验Ⅱ组自由采食。试验场试验与养殖户试验开展过程中,每天统计耗料量,试验结束时分别计算并分析各组肉鸡的上市率、个体均重、料重比、次鸡率及只均利润等指标。试验场试验结果表明,各组肉鸡上市率、料重比及次鸡率差异均不显著（P〉0.05）;试验3组的个体均重显著低于对照组及其他试验组（P〈0.05）;试验1组只均利润显著高于对照组及其他试验组（P〈0.05）。养殖户试验结果表明,试验Ⅰ组的次鸡率显著高于对照Ⅰ组和试验Ⅱ组（P〈0.05）。结果提示,中鸡阶段饲喂粗蛋白质含量为14%的低水平粗蛋白质日粮,能够提高三黄肉鸡的只均利润,且以自由采食方式效果最佳。The field experiments were carried out in chicken farm and chicken raising households to evaluated the effect of low crude protein diet on the production performance and culture benefit of long days three-yellow chicken. A total of 1 600 three- yellow chicken were selected in a chicken farm and randomly divided into four groups （control, experimental group 1, 2 and 3 ）. There were two replications for each groupand 200 chickens in each replication. The chicks （age of 1-35 d） and adult chickens （from age of 76 d to sale） of control and experimental groups fed with routine diet, the middle age chickens （age of 36-75 d） of control group fed with diet containing 17% crude protein and those of experimental group 1, 2 and 3 fed with low crude protein diet containing 14%, 12% and 10% crude protein, respectively. The digestible essential amino acid content of diet for each group was same. A total of eight chicken raising households were selected and randomly divided into four groups （control group I and II, experimental group I and lI ）. There were two chicken raising households in each group and 8 000 chickens in each chicken raising household. The chicks （age of 1-35 d） and adult chickens （from age of 76 d to sale） of control and experimental groups fed with routine diet, the middle age chickens （age of 36-75 d） of control groups fed with diet containing 17% crude protein and those of experimental groups fed with low crude protein diet containing 14% crude protein. The digestible essential amino acid content of diet for each group was same. The ingestion behavior type of control I group and experimental group I were restricted feeding and control U group and experimental group II were ad libitum feeding. During tile two field experiments, the daily feed consumption for each group was recorded. In the end of the experiments, the sale rate, average individual weight, ratio of feed to gain, defective chickens rate and average individual benefit of each group were calculated and statisticall

关 键 词：三黄肉鸡 低粗蛋白质日粮 限量喂料 自由采食 养殖效益 

分 类 号：S831.5[农业科学—畜牧学]