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

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dc.citation.volume16
dc.contributor.authorBarua M
dc.contributor.authorAbdollahi MR
dc.contributor.authorZaefarian F
dc.contributor.authorWester TJ
dc.contributor.authorGirish CK
dc.contributor.authorChrystal PV
dc.contributor.authorRavindran V
dc.coverage.spatialChina
dc.date.accessioned2024-12-01T21:28:22Z
dc.date.available2024-12-01T21:28:22Z
dc.date.issued2023-12-02
dc.description.abstractStandardized 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 source. Titanium 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 group. Each 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), respectively. The apparent digestibility coefficients were standardized using age-specific basal endogenous AA flows. In 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; P < 0.05) 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 35. The SIDC of some individual AA (Arg, Thr, Trp, Cys, Pro) were affected (P < 0.05 or P < 0.001) in a quadratic manner by age. In the CM, the SIDC of N, average SIDC of IAA, DAA and TAA were influenced (quadratic; P < 0.05 or P < 0.001) by age. The 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 28. The average SIDC of IAA was low between d 7 and 28 and increased thereafter. The SIDC of individual AA were affected (linear or quadratic; P < 0.05 or P < 0.001) by different magnitudes by age. The age influence on the SIDC AA was variable, depending on the protein source and AA. The results demonstrate that age-specific SIDC AA data might need consideration in broiler feed formulations.
dc.description.confidentialfalse
dc.edition.editionMarch 2024
dc.format.pagination11-22
dc.identifier.author-urlhttps://www.ncbi.nlm.nih.gov/pubmed/38131028
dc.identifier.citationBarua M, Abdollahi MR, Zaefarian F, Wester TJ, Girish CK, Chrystal PV, Ravindran V. (2024). Effect of age on the standardized ileal amino acid digestibility of soybean meal and canola meal in broilers.. Anim Nutr. 16. (pp. 11-22).
dc.identifier.doi10.1016/j.aninu.2023.09.004
dc.identifier.eissn2405-6383
dc.identifier.elements-typejournal-article
dc.identifier.issn2405-6545
dc.identifier.piiS2405-6545(23)00131-2
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/72133
dc.languageeng
dc.publisherElsevier B.V. on behalf of KeAi Communications Co., Ltd.
dc.publisher.urihttps://www.sciencedirect.com/science/article/pii/S2405654523001312
dc.relation.isPartOfAnim Nutr
dc.subjectAge
dc.subjectAmino acid
dc.subjectBroiler
dc.subjectDigestibility
dc.subjectProtein source
dc.titleEffect of age on the standardized ileal amino acid digestibility of soybean meal and canola meal in broilers
dc.typeJournal article
pubs.elements-id485131
pubs.organisational-groupOther
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