低蛋白氨基酸平衡饲粮对蛋鸡育成阶段生长性能的影响  

Effects of Low Protein and Amino Acid Balanced Diet on Growth Performance of Laying Hens at Growing Stage

作　　者：陈晓慧 孙冬艳 王通 隋凤桐 杨群辉[2] CHEN Xiaohui;SUN Dongyan;WANG Tong;SUI Fengtong;YANG Qunhui(Liaoning Greatwall Agri-industrial Co.,Ltd.,Liaoning Shenyang 110144,China;Shenyang Agricultural University,Liaoning Shenyang 110866,China)

机构地区：[1]辽宁大成农牧实业有限公司,辽宁沈阳110144 [2]沈阳农业大学,辽宁沈阳110866

出　　处：《饲料工业》2021年第18期24-28,共5页Feed Industry

基　　金：农业重大专项[2019JH1/10200002]。

摘　　要：为研究必需氨基酸平衡且相同条件下降低饲粮粗蛋白水平对育成阶段蛋鸡生长性能、骨骼发育、性成熟指标、粪便pH和粪便干物质中粗蛋白含量的影响。试验选取体重相近、健康状态良好的70日龄海兰褐育成鸡400只,分为4个处理,饲粮蛋白水平分别为:对照组16.58%、试验1组16.16%、试验2组15.71%、试验3组15.05%,每个处理5个重复,每个重复20只鸡。预饲7 d,试验期42 d。在试验开始及结束称取鸡只体重,记录每周耗料量,计算体重均匀度、料重比;同时测量胫骨长度。试验结束测量输卵管长度及卵泡重量,检测粪便pH和粪便干物质中粗蛋白含量。结果表明:①各处理组中试验初体重、试验末体重、总增重及料重比均无显著差异(P>0.05);但各组之间总采食量差异显著(P<0.05),其中试验1组最高为3036.40 g,对照组总采食量最低为2959.20 g,试验2组、试验3组分别为3012.00、2986.80 g;②各处理组胫骨长度差异不显著(P>0.05);③各处理组输卵管长度、卵巢重量差异不显著(P>0.05);④粪便pH各组之间无显著差异(P>0.05),但粪便干物质中粗蛋白含量各试验组均显著低于对照组(P<0.05);试验1、2、3组中粗蛋白含量比对照组分别低13.51%、14.12%、10.39%。综上在必需氨基酸平衡且相同条件下降低粗蛋白水平对育成阶段蛋鸡生长性能、骨骼发育及性成熟等指标无显著影响,但显著降低了粪便干物质中粗蛋白含量。上述结果表明,在减少饲粮中豆粕应用的同时可以有效降低粪便中氮的排放量,即有助于节约饲料成本及环境保护。This experiment was conducted to study the effects of reducing dietary crude protein level on growth performance,bone development and sexual maturation indexes,fecal pH and fecal crude protein contents of laying hens,during growing period under the same level of essential amino acids.400 Hy-line brown hens of 70 day-old with good health and closely weight were randomly assigned four groups with five replicates of 20 hens each.The crude protein level of control group was 16.58%,the crude protein level of experimental group 1,group 2 and group 3 was 16.16%,15.71%and 15.05%,respectively.The experiment lasted for 42 days.At the beginning and end of the experiment the body weights of hens were weighted,feed comsumption was recorded weekly,the weight uniformity and feed/gain were calculated;tibia length was measured at the same time.Oviduct length,ovary weight,fecal pH value and fecal crude protein contents were measured at the end of the experiment.The results showed as the followings:①The initial body weight,the final body weight,the total weight gain and feed/gain had no signifi cant differences among all the treatment groups(P>0.05),but the total feed intakes in experimental group 1,group 2 and group 3 were significantly increased compared with the control group(P<0.05).The highest feed intake in experimental group 1 was about 3036.40 g,while the lowest feed intake in the control group was about 2925.20 g.The feed intake in experimental groups 2 and 3 was 3012.00 g and 2986.80 g,respectively.②Tibia length were not significant different among all the treatment groups(P>0.05).③The oviduct length and the ovary weight were not significant different among all the treatment groups(P>0.05).④Fecal pH values were not significant different among all the groups(P>0.05),but the crude protein contents in fecal dry matter of experimental groups were significantly lower than that of the control group(P<0.05).Compared with the control group,the crude protein contents in fe cal experimental groups 1,2 and 3 were decreased b

关 键 词：必需氨基酸 低蛋白 蛋鸡 总增重 料重比 胫骨长度 

分 类 号：S816.32[农业科学—饲料科学]