Effect of age on the standardized ileal amino acid digestibility of soybean meal and canola meal in broilers

作     者：Mukti Barua M.Reza Abdollahi Faegheh Zaefarian Timothy J.Wester Channarayapatna K.Girish Peter V.Chrystal Velmurugu Ravindran Mukti Barua;M.Reza Abdollahi;Faegheh Zaefarian;Timothy J.Wester;Channarayapatna K.Girish;Peter V.Chrystal;Velmurugu Ravindran

作者机构：Monogastric Research CenterSchool of Agriculture and EnvironmentMassey UniversityPalmerston North 4442New Zealand Department of Animal Science and NutritionFaculty of Veterinary MedicineChattogram Veterinary and Animal Sciences UniversityKhulshiChattogram 4225Bangladesh Nutrition and CareAnimal NutritionEvonik(SEA)Pte.Ltd609927 Singapore Complete Feed SolutionsHowick 2145AucklandNew Zealand 

出 版 物：《Animal Nutrition》 (动物营养（英文版）)

年 卷 期：2024年第16卷第1期

页      面：11-22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] 0906[农学-兽医学] 09[农学] 

基　　金：“AgriFutures Australia Chicken Meat Program”for funding the project(grant number PRJ011835) 

主　　题：Age Amino acid Broiler Digestibility Protein source 

摘      要：Standardized ileal digestibility coefficients(SIDC)of nitrogen(N)and amino acids(AA)in two protein sources(soybean meal[SBM]and canola meal[CM])were investigated at six broiler ages(d 7,14,21,28,35,and 42).Two assay diets were formulated to contain either SBM(413 g/kg)or CM(553 g/kg)as the sole dietary AA *** dioxide(5 g/kg)was added as an indigestible marker.A total of 696 male broilers at 1 d old were allotted to 12 replicate cages per age *** assay diet was offered to birds for 4 d prior to the ileal digesta collection on d 7(14 birds/cage),14(12 birds/cage),21(10 birds/cage),28(8 birds/cage),35(8 birds/cage)and 42(6 birds/cage),*** apparent digestibility coefficients were standardized using age-specific basal endogenous AA *** the SBM group,though the SIDC of N tended to be influenced(quadratic;P=0.075)by age,no linear or quadratic response of age effect was observed on the average SIDC of indispensable(IAA)and total AA(TAA).An age effect(quadratic;P0.05)was observed on the average SIDC of dispensable AA(DAA)in SBM with the highest value recorded at d 7,followed by a decrease from d 14 to 28,which increased beyond d *** SIDC of some individual AA(Arg,Thr,Trp,Cys,Pro)were affected(P0.05 or P0.001)in a quadratic manner by *** the CM,the SIDC of N,average SIDC of IAA,DAA and TAA were influenced(quadratic;P0.05 or P0.001)by *** SIDC of N and average SIDC of DAA and TAA were higher from d 7 to 14,declined at d 21,and then increased beyond d *** average SIDC of IAA was low between d 7 and 28 and increased *** SIDC of individual AA were affected(linear or quadratic;P0.05 or P0.001)by different magnitudes by *** age influence on the SIDC AA was variable,depending on the protein source and *** results demonstrate that age-specific SIDC AA data might need consideration in broiler feed formulations.