低蛋白质氨基酸平衡日粮对高温环境下肥育猪生长性能、血清指标和蛋白质表观消化率的影响  

Effects of Low Protein Amino Acid Balanced Diets on Growth Performance,Serum Parameters and Apparent Protein Digestibility of Finishing Pigs in High Ambient Temperature

作　　者：刘景[1] 方桂友[1] 缪伏荣[1] 叶鼎承[1] 董志岩[1] 

机构地区：[1]福建省农业科学院畜牧兽医研究所,福建福州350013

出　　处：《福建农业学报》2014年第12期1159-1163,共5页Fujian Journal of Agricultural Sciences

基　　金："十二五"国家科技支撑计划项目子课题(2012BAD14B15-101)

摘　　要：探讨高温环境下低蛋白质氨基酸平衡日粮对肥育猪生长性能、血清指标和蛋白质表观消化率的影响。90头平均体重为（65．90±3．37）kg 的杜长大三元杂交猪随机分为3个组，每组3个重复，每个重复10头猪（5头公，5头母），1组为对照组，粗蛋白质水平为16．02％，2组、3组为试验组，日粮粗蛋白质水平分别为14．08％和12．05％。试验期40 d。结果表明，在日平均温度为29．53～31．16℃条件下，2组、3组平均日增重分别比1组提高2．49％和1．81％，差异不显著（P ＞0．05），平均日采食量、料重比组间差异不显著（P ＞0．05）；血清皮质醇（F）、T3、T4浓度组间差异均不显著（P ＞0．05）；血清尿素氮（BUN）浓度 2组、3组分别比1组降低10．45％和19．13％，差异均显著（P ＜0．05）；氮表观消化率组间差异不显著（P ＞0．05），粪氮排泄量2组、3组分别比1组降低10．48％和25．64％，差异均显著（P ＜0．05）。由此可见，在高温环境条件下，低蛋白质氨基酸平衡日粮未能缓解热应激对肥育猪生长性能、血清指标和蛋白质表观消化率的影响。The experiment was conducted to investigate the effects of low protein amino acid balanced diets on growth performance, serum parameters and apparent protein digestibility of finishing pigs in high ambient temperature.Ninety Landrace x Large White x Duroc pigs with average initial body weight about （65.90 ±3.37） kg were randomly allocated into 3 groups with 3 replicates in each group and 10 pigs in each replicate.Pigs in three groups were fed with diets differently in protein level for 16.02% （trial group 1 as control ）,14.08% （trial group 2）and 12.05 （trial group 3）respectively.The experiment lasted for 40 days.The results showed that,at average temperature between 29.53℃ to 31.16℃,average daily gain （ADG）in group 2 and 3 was increased respectively by 2.49% and 1.81% （P 〉0.05）comparing to control group.There were no significant differences among the groups （P 〉0.05）in average daily feed intake （ADFI）and F/G （feed/gain）,in the concentration of serum cortisol （F） and endocrine hormone T3,T4. Comparing to control group,the concentration of serum urea nitrogen （BUN）in group 2 and 3 was decreased respectively by 10.45% and 19.13% （P 〈0.05）while no significant differences were found in the apparent digestibility of crude protein among the groups （P 〉0.05）.The N excretion in group 2 and group 3 was decreased by 10.48% and 25.64%,respectively,comparing with it in group 1 （P 〈 0.05 ）.In conclusion,Low-protein diet did not alleviate the effects of high temperature stressing on growth performance,＆nbsp;serum parameters and apparent protein digestibility of finishing pigs.

关 键 词：低蛋白质 氨基酸平衡 生长性能 血清指标 表观消化率 热应激 肥育猪 

分 类 号：S828[农业科学—畜牧学]