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饲粮能量水平对荷斯坦阉牛生长、屠宰性能及肉品质的影响.docx

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饲粮能量水平对荷斯坦阉牛生长、屠宰性能及肉品质的影响 Title:TheImpactofDietaryEnergyLevelsontheGrowth,SlaughterPerformance,andMeatQualityofHolsteinSteers Introduction: Inrecentyears,therehasbeenagrowinginterestinexploringtherelationshipbetweendietaryenergylevelsandthegrowth,slaughterperformance,andmeatqualityoflivestockanimals.Amongtheselivestockanimals,Holsteinsteershavegainedsignificantattentionduetotheirpotentialasbeefcattle.UnderstandingtheimpactofdietaryenergylevelsonHolsteinsteerproductionparameterscanaidindevelopingoptimizedfeedingstrategiesformaximumgrowth,superiorslaughterperformance,andimprovedmeatquality.Thispaperaimstoexploretheeffectsofdietaryenergylevelsonthegrowth,slaughterperformance,andmeatqualityofHolsteinsteers. Methods: TostudytheeffectofdietaryenergylevelsonHolsteinsteergrowth,slaughterperformance,andmeatquality,acontrolledfeedingexperimentwasconducted.AtotalofXnumberofHolsteinsteerswererandomlydividedintoXgroups,eachgrouprepresentingaspecificdietaryenergylevel.Theexperimentincludedacontrolgroupfedwithastandardenergylevelandtreatmentgroupsfedwithlowerandhigherenergylevels.Theenergylevelswereadjustedbyalteringtheproportionofconcentrateandforageinthediet.TheexperimentdurationwasXweeks. Results: 1.GrowthPerformance: -AverageDailyGain(ADG):TheHolsteinsteersfedwithhigherdietaryenergylevelsshowedsignificantlyhigherADGcomparedtothecontrolandlowerenergylevelgroups.ThisobservationsuggeststhathigherenergylevelspositivelyinfluencethegrowthrateofHolsteinsteers. -FeedConversionRatio(FCR):TheFCRwasimprovedinthehigherenergylevelgroup,indicatingthatahigherdietaryenergylevelcanenhancefeedefficiencyinHolsteinsteers. 2.SlaughterPerformance: -CarcassWeight:TheHolsteinsteersfedwithhigherdietaryenergylevelsachievedsignificantlyhighercarcassweightscomparedtothecontrolandlowerenergylevelgroups.ThisresultsuggeststhathigherenergylevelscontributetoincreasedcarcassweightinHolsteinsteers. -DressingPercentage:Thedressingpercentagewasobservedtobesimilaramongthedifferentdietaryenergylevelgroups,indicati