低蛋白基础日粮添加限制性氨基酸对育肥猪生长性能、养分消化率和血浆生化指标的影响  

Effects of low-protein supplement with amino acids on growth performance,nutrient digestibility and blood biochemical parameters in finishing pigs

作　　者：安靖 郭子義 马政发 杨艺[1] 吴文旋[1,2] 段永邦 陈鑫珠 AN Jing;GUO Ziyi;MA Zhengfa;YANG Yi;WU Wenxuan;DUAN Yongbang;CHEN Xinzhu(Key Lab of Animal Genetics,Breeding and Reproduction in the Plateau Mountainous Region of Ministry Education,College of Animal Science,Institute of Animal Nutrition and Feed Science,Guizhou University,Guiyang,Guizhou Province 550025,China;Institute of New Rural Development,Key Lab of Plateau Mountain Livestock Pollution Control and Resource Reuse Technology of Guizhou Province,Guizhou University,Guiyang,Guizhou Province 550025,China;Kaili Bureau of Agriculture and Rural,Kaili,Guizhou Province 556000,China;Institute of Animal Husbandry and Veterinary Medicine,Fujian Academy of Agricultural Sciences/Fujian Key Laboratory of Animal Genetics and Breeding,Fuzhou,Fujian Province 350013,China)

机构地区：[1]贵州大学高原山地动物遗传育种与繁殖教育部重点实验室,动物科学学院动物营养与饲料科学研究所,贵州贵阳550025 [2]贵州大学新农村发展研究院,贵州省山地畜禽养殖污染控制与资源化技术工程实验室,贵州贵阳550025 [3]凯里市农业农村局,贵州凯里556000 [4]福建省农业科学院畜牧兽医研究所/福建省畜禽遗传育种重点实验室,福建福州350013

出　　处：《中国饲料》2023年第11期77-81,共5页China Feed

基　　金：国家自然科学基金(31960674);贵州省科学技术基金项目(黔科合基础[2018]1403);福建省区域发展项目(2020N3017)。

摘　　要：为研究降低日粮蛋白水平并添加氨基酸对育肥猪生长性能、营养物质表观消化率及血浆生化指标的影响,试验采用单因素完全随机设计,选取90头体重相近、体况良好的三元杂交育肥猪,随机分为3组:对照组(CTR,CP=16%),低蛋白日粮组(LP,CP=14%)及低蛋白+氨基酸组(LP+AA),低蛋白日粮中添加赖氨酸、蛋氨酸、色氨酸及苏氨酸。每组6个重复,每个重复5头猪。试验预饲期5 d,正饲期40 d。结果显示:降低日粮蛋白水平或在此基础上补充氨基酸对育肥猪生长性能影响不明显(P>0.05)。同时,对营养物质表观消化率并未产生显著影响(P>0.05)。与对照组相比,低蛋白+氨基酸组料重比更低(P=0.06),血浆总胆固醇(TC)水平降低了26.70%,差异趋于显著(P=0.06)。研究结果表明,降低育肥猪日粮蛋白质水平并补充氨基酸并不会对生长性能造成负面影响,同时,可降低血浆胆固醇水平,有利于机体健康。This experiment was conducted to determine the effects of a low-protein diet supplement with synthetic amino acids on growth performance,nutrient apparent digestibility,and biochemical parameters of blood plasma in finishing pigs.A total of 90 healthy finishing pings with similar body weight were randomly assigned equally to receive a control diet(CTR,16%CP of DM basis),a low-protein diet(LP,14%CP of DM basis),and a low-protein diet supplement with Lys,Met,Trp,and Thr(LP+AA,14%CP of DM basis).Each group contains 6 replicates with 5 pigs per replicate.The experiments lasted 45 days,including a 5-day adaptation period.The results showed that the growth performance and the nutrient apparent digestibility were not affected by different diets(P>0.05).The feed to gain ratio was numerically lower in the LP+AA group compared with the control group(P=0.06).A trend towards 26.7%lower plasma total cholesterol levels was observed in the LP+AA group than the control group(P=0.06).In conclusion,the low-protein diet supplemented with synthetic amino acids did not affect the growth performance of finishing pigs,and lowered the plasma concentrations of total cholesterol,thus improving the health status of pigs.

关 键 词：低蛋白饲粮 氨基酸平衡 生长性能 养分消化率 育肥猪 

分 类 号：S816.7[农业科学—饲料科学]