Glutamic acid supplementation recovers the reduced performance of weanling pigs fed reduced crude protein diets

作     者：Santi D.Upadhaya Sang Seon Lee Young Hwa Kim Zhenlong Wu In Ho Kim Santi D.Upadhaya;Sang Seon Lee;Young Hwa Kim;Zhenlong Wu;In Ho Kim

作者机构：Department of Animal Resource and ScienceDankook UniversityNo.29 AnseodongCheonanChoongnam 31116South Korea National Institute of Animal Science114 Sinbangro-1 GilSeongjwan-eupSeobuk-guCheonan-si31000South Korea State Key Laboratory of Animal NutritionDepartment of Animal Nutrition and Feed ScienceChina Agricultural UniversityBeijing 100193China 

出 版 物：《Animal Nutrition》 (动物营养（英文版）)

年 卷 期：2022年第8卷第1期

页      面：249-255页

核心收录：

学科分类：090502[农学-动物营养与饲料科学] 0905[农学-畜牧学] 09[农学] 0906[农学-兽医学] 

基　　金：This work was carried out with the support of Cooperative Research Program for Agriculture Science and Technology Development(Project No.PJ014485012020)of the Rural Development Administration Republic of Korea and was also supported by the Department of Animal Resources&Science through the Research Focused Department Promotion Project as a part of the University Innovation Support Program for Dankook University in 2021. 

主　　题：Glu Growth performance Reduced protein diet Weanling pig 

摘      要：This study was conducted to evaluate the supplementation of glutamic acid(Glu)to reduced protein diets on the performance of weanling pigs.One hundred and eighty crossbred weanling pigs([Yorkshire
Landrace]
Duroc,21 d old)having similar body weight(BW)of 6.45 kg were randomly allotted to 1 of 6 dietary treatments(5 pigs per pen[2 barrows and 3 gilts];6 pens per treatment)based on BW and sex during a 6-week trial.Dietary treatments consisted of positive control(PC)diet formulated to have 226.9,205.6,and 188.8 g crude protein(CP)during phases 1,2,and 3,respectively,and negative control(NC)diets with 20 g CP reduction from PC diets and addition of Glu with increasing levels,resulting in the calculated Lys-to-Glu ratios of 1:2.25,1:2.30.1:2.35,1:2.40,and 1:2.45,designated as NC,NC1,NC2,NC3,and NC4,respectively.The BW of pigs receiving PC diet was higher(P0.05)than those receiving NC diet at d 7,21 and 42.A higher(P0.05)average daily gain(ADG)from d 1 to 7,8 to 21,22 to 42 and during the overall experiment period was observed in pigs fed PC than NC diet.Pigs fed NC diets including the graded level of Glu linearly increased(P0.05)BW at d 42,ADG and gain-to-feed ratio(G:F)during the overall experimental period.In addition,trends in linear increase in BW(P=0.056)at d 7 and ADG from d 1 to 7 and d 22 to 42(linear effect,P=0.081,P=0.058 respectively)were observed.A tendency in the linear increment of NH3(P=0.082)at d 21 and linear reduction in methyl mercaptans(P=0.054)emission at d 42 was observed in pigs fed NC diets supplemented with graded level of Glu.In conclusion,supplementing the reduced protein diet with Glu enhanced the growth performance in weanling pigs suggesting that supplementation of Glu can compensate the reduction of 2%CP in the basal diets.