采前喷施保鲜剂对美早甜樱桃贮藏特性 及品质的影响

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中图分类号：S662.5 文献标识码：A

Abstract：【Objective】The effects of differentconcentrations of calcium propionate and chitosanapplied pre-harveston the storagecharacteristicsandfruitqualityofTietioncherres wereinvestigatedtoprovideatheoreticalbasisforoptimizingcherry cultivation managementand pre-harvest preservationtechniques.【Methods】Using8-year-oldTietioncheriesas experimental material， different concentrations of calcium propionate （0.5% ， 1% ， 1.5% ）and chitosan （ 0.5% ， 1% ， 1.5% ）were sprayed during the young fruitstage，expansion stage，and colorchange stage.Water spraying was used as thecontrol. After fruit maturity，storage tests wereconductedto measure indicators suchasdecayrate，fruit firmness，solublesolidscontent（SSC），to tal acid content，and ascorbic acid during storage. 【Results】 Pre-harvest application of 1% chitosan（T5）and 1.5% chitosan （T6）significantlyinhibitedfruitdeterioration.Moreover，chitosantreatmentsignificantlydelayedthedecreaseinacidcontent of Tietion cherries and maintained the quality fraction of SSC and ascorbic acid （ ΔVc） . The calcium propionate treatment group （T3）inhibited Vc degradation by chelating free radicals （with a retention rate 7.5% higher than the control）. The effects of both preservatives were concentration-dependent，with the 1.5% chitosan treatment group（T6） showing the best overall performance，while the calcium propionate treatment group was more suitable at 1% concentration（T2） for balancing preservationandcelladaptability.【Conclusion】The studyconfirmed thefeasibilityof extending theshelflifeof Tietioncherries byapplyingpre-harvestpreservatives through filmformationtoinhibit bacteria，regulaterespiratory metabolism，and enhance antioxidant activity.This provides a theoretical basis for establishing a“pre-harvest resistance induction + post-harvest low-temperature storage”gren preservation system，thereby promoting the eficient developmentof the Tietion chery industry.

Key words：sweet cherries；preharvest；calcium propionate；chitosan；storage quality

甜樱桃（PrunusaviumL.）因其果个大、色泽鲜艳、营养丰富及经济价值高等特点，已成为我国栽培的重要果树之一。（剩余6312字）