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Performance and nutrient digestibility of broilers fed barley-based diets supplemented with amylase

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dc.abstract.enThis study evaluated the effects of exogenous amylase supplementation in barley-based diets for broiler chickens. Two experiments (Exp. 1 and 2) were conducted, in which 11-to-33-d-old broilers were assigned to two dietary treatments (with or without amylase at 81 kg-novo units/kg diet) in a randomized design. Exp. 1 used 352 male broilers (8 replicates of 22 birds) and a low-viscosity normal hulled barley, while Exp. 2 utilized 484 female broilers (11 replicates of 22 birds) and a normal hulled cultivar of high-viscosity. All diets in both trials were supplemented with phytase and a xylanase and β-glucanase complex. In Exp. 1, amylase tended to improve feed conversion ratio (P < 0.1) and increased AID of crude protein (CP) (P < 0.05) at 33 d of age but had no effect on AID of starch. In Exp. 2, no effects of amylase were observed on growth performance, AID of starch and CP, or relative organ weights. Overall findings from both Exp indicate that amylase supplementation can increase CP digestibility of barley-based diets depending on intrinsic viscosity, which may then improve performance. High starch digestibility observed in diets without amylase explains the lack of enzyme effect and suggests the investigated barleys caused no major detrimental effects to nutrient utilization, although the use of high-viscosity barley in Exp. 2 led to lower AID of starch and CP than Exp. 1. The use of a fiber-degrading enzyme likely enhanced starch utilization, leaving limited room for improvements with amylase for broilers at this age.
dc.affiliationWydział Medycyny Weterynaryjnej i Nauk o Zwierzętach
dc.affiliation.instituteKatedra Żywienia Zwierząt
dc.contributor.authorBassi, Lucas S.
dc.contributor.authorItani, Khaled
dc.contributor.authorAhmad, Muhammad
dc.contributor.authorSmith, Adam
dc.contributor.authorCowieson, Aaron
dc.contributor.authorKaczmarek, Sebastian
dc.contributor.authorSvihus, Birger
dc.date.access2025-11-11
dc.date.accessioned2025-12-22T13:32:17Z
dc.date.available2025-12-22T13:32:17Z
dc.date.copyright2025-11-17
dc.date.issued2025
dc.description.accesstimeat_publication
dc.description.bibliographybibliogr.
dc.description.financepublication_nocost
dc.description.financecost0.00
dc.description.if2,7
dc.description.numberDecember 2025
dc.description.points200
dc.description.versionfinal_published
dc.description.volume330
dc.identifier.doi10.1016/j.anifeedsci.2025.116568
dc.identifier.issn0377-8401
dc.identifier.urihttps://sciencerep.up.poznan.pl/handle/item/6484
dc.identifier.weblinkhttps://www.sciencedirect.com/science/article/pii/S0377840125003633
dc.languageen
dc.pbn.affiliationanimal science and fisheries
dc.relation.datasetThis study received financial support from the project ‘Increased SUStainability through a higher use of barley and oats in BROILer production’ (Norwegian Research Council, project no. 320308), with support from UPP (Poznań, Poland), NMBU (Ås, Norway), dsm-firmenich (Derbyshire, UK), Felleskjøpet Forutvikling A.S. and Nortura S.A. (Oslo, Norway).
dc.relation.ispartofAnimal Feed Science and Technology
dc.relation.pagesart. 116568
dc.rightsCC-BY
dc.sciencecloudnosend
dc.share.typeOTHER
dc.subject.enfeed enzymes
dc.subject.enfeed digestibility
dc.subject.enpoultry nutrition
dc.subject.enbarley
dc.subject.enstarch
dc.titlePerformance and nutrient digestibility of broilers fed barley-based diets supplemented with amylase
dc.typeJournalArticle
dspace.entity.typePublication
oaire.citation.volume330