李果實減壓及浸鈣貯藏保鮮機理研究.pdf

1、河北農(nóng)業(yè)大學碩士學位論文李果實減壓及浸鈣貯藏保鮮機理研究姓名：張廣燕申請學位級別：碩士專業(yè)：森林培育指導教師：楊建民20050620StudiesonMechanismofDecompressionandcalciumtreatmentsStorageofPlumFruitNalEe：ZhangGuangyahSpeciality：ForestCultivationSupervior：YangJianminAbstraetUsingth

2、eFraiarandAngelenoplumfruitastrialmaterialsandphysiological—biochemicalanalysisasexperimentalmethods，theinfluencesofvariedconditionsofdecompressionstorageandcalciumtreatmentsofdifferentconsistencyonthefruitquality，respir

3、ationintensionandethyleneproductionrate，MDAcontent，protectiveenzymeactivityandstorageeffectofptumfruitswerestudiednemechanismofdecompressionandcalciumtreatmentsstorageofplumfruitwerediscussedTheresultsareasfollows：Therew

4、eretwOobviousrespirationpeaksduringthestorage，thusindicatedthattheplumwasatypicalrespirationclimactericfruitAfter30daysdecompressionstorage，thefirstrespirationpeakappeared，whichwas10dayslaterthanthoseundercommonpressure(

5、CK)，anditspeakvalueonlyaccountedfor335％ofthelatter’SThesecondrespirationpeakappearedafter70daysstoragethepeakvalueonlyaccountedfor664％ofthoseoftheCKnemaximumethyleneproductionappearedbetweentworespirationpeaksThemaximume

6、thyleneproductionsunderdecompressionandcalciumtreatmentappearedafter60daysstorage，whichweredelayed14daysandshowedsignificantlylowerpeakvaluescomparedwiththeCK’STherefore，decompressionandcalciumtreatmentsigaificanflypostp

7、onedtheappearanceofrespirationandethyleneproductionpeaks，reducedrespirationrateandinhibitedethylenebiosynthesisUndertwodecompression(203kPa、507kPa)conditions，thehardnessandbrittlenessofplumfruitswerewellpreserved，thecont

8、entsofSSC、TA、solublesugar、deoxidizationsugar、starch、VcWerereduced，thedecreaseofSODactivityandtheaccumulationofMDAcontentwereslowedthePODwaskeptwitllnegativeactivitythustheripeningandsenescenceofplumfruitseffectivelylinge

9、red，thestoragedurationwasprolongedComparedwithcommonpressure(10133kPa)，theplumfruitstoredunder203kPapresentedtheoptimumeffectsand507kPatakessecondplaceAfterthel％and2％CaCl2treatmentsontheFralarandAngelenoplumfruitsrespect