饲料研究2024，Vol.47Issue(13)：37-41,5.DOI:10.13557/j.cnki.issn1002-2813.2024.13.008
低蛋白饲粮补充不同氨基酸对育肥猪生长性能、血清生化指标、养分表观消化率及氮排放的影响
Effects of low protein diets supplemented with different amino acids on growth performance,serum biochemical indices,nutrient apparent digestibility,and nitrogen emission of finishing pigs
摘要
Abstract
This experiment was conducted to investigate the effects of low protein diet supplemented with different amino acids on the growth performance,serum biochemical indices,nutrient apparent digestibility,and nitrogen emission of finishing pigs.A total of 120'Duroc × Landrace × Yorkshire'finishing pigs with a body weight of about 75 kg were randomly divided into three treatments with four replicates per treatment and 10 pigs per replicate.The pigs in control group were fed a diet with 13.45％CP level,and the pigs in trial group Ⅰ and group Ⅱ were fed a diet with 10.41％CP level.The pigs in trial group Ⅰ were fed four amino acids(lysine,methionine,tryptophan,and threonine),and the pigss in trial group Ⅱ were fed six amino acids(lysine,methionine,tryptophan,threonine,valine,and isoleucine).The experiment lasted for 28 days.The results showed that compared with the control group,the average daily feed intake and average daily gain in trial group Ⅰ were significantly decreased(P＜0.05),while the daily feed intake and daily gain in trial group Ⅱ were lower than those in control group(P＞0.05).The content of serum urea nitrogen in experimental group Ⅰand group Ⅱ was significantly decreased(P＜0.05).There were no significant differences in the apparent digestibility of nutrients in all groups(P＞0.05).Nitrogen intake,urinary nitrogen emission and total nitrogen emission in trial group Ⅰand group Ⅱ were significantly decreased(P＜0.05),the fecal nitrogen emission was decreased,nitrogen deposition rate and nitrogen apparent biological value were increased in trial group Ⅰ and group Ⅱ(P＞0.05).The study indicates that a low protein diet(CP=10.41％)supplemented with six kinds of amino acids has no negative effect on growth performance of finishing pigs,and can effectively reduce nitrogen emissions.关键词
低蛋白饲粮/育肥猪/生长性能/氮排放Key words
low protein diet/finishing pigs/growth performance/nitrogen emission分类
农业科技引用本文复制引用
刘玉,林萌萌,徐小蛟..低蛋白饲粮补充不同氨基酸对育肥猪生长性能、血清生化指标、养分表观消化率及氮排放的影响[J].饲料研究,2024,47(13):37-41,5.基金项目
甘肃省科技计划资助(项目编号:22JR5RE1040) （项目编号:22JR5RE1040）
