薄膜包装限气贮藏在李果实上的保鲜效果

研究了不同薄膜气调包装(0.03 mm PVC、0.04 mm PVC和0.03 mm PE)对‘黑宝石’和‘安哥诺’李的保鲜效果。结果表明,与对照相比,PE薄膜气调处理可减弱‘黑宝石’李果实的呼吸速率和乙烯释放量,缓解其硬度、可溶性固形物(SSC)和可滴定酸(TA)含量的下降,并减轻其腐烂症状。0.03 mm PVC和PE薄膜气调处理可降低‘安哥诺’李的腐烂症状,而0.04 mm PVC包装处理加重了果实的腐烂;与对照相比,这3种薄膜气调包装对‘安哥诺’李果实呼吸速率、乙烯释放量及硬度的影响均不显著;0.04 mm PVC和PE处理对‘安哥诺’李SSC的影响不显著,但0.03 mm PVC处理加速了SSC的下降,然该处理可减缓‘安哥诺’李TA含量的下降。因此,认为PE气调包装,即φ(O2)=(16.0±0.31)%和φ(CO2)=(4.37±0.17)%的组合,适宜‘黑宝石’李的贮藏保鲜;而这3种薄膜包装材料对‘安哥诺’李贮藏效果均不理想。

Effects of Modified Atmosphere Packaging Storage on Fresh keeping of Plum Fruit

The influence of different modified atmosphere packaging(MAP) on storage quality in ’Friar’ and ’Angeleno’ plum stored at(0±0.5)℃ was investigated.The results showed that treatments with polyethylene film could inhibit respiratory rate and ethylene production,alleviate the reduction of firmness,soluble solids content(SSC) and titratable acid content(TA),and reduce rot symptom of ’Friar’ plum fruit in comparison with CK.Treatments of polyvinylchlorid(thickness 0.03 mm) and polyethylene(thickness 0.03 mm) films could reduce rot symptom of ’Angeleno’ plum,while the treatment of polyvinylchlorid(thickness 0.04 mm) aggravated rot symptom.Effect of the three types of MAP on respiratory rate,ethylene production and firmness of ’Angeleno’ plum were not significant in comparison with CK.Effects of polyvinylchlorid(thickness 0.04 mm) and polyethylene film(thickness 0.03 mm) treatments on SSC of ’Angeleno’ plum were not significant,but the SSC reduction was accelerated by polyvinylchlorid(thickness 0.03 mm),while this treatment could alleviate TA reduction of ’Angeleno’ plum.Therefore,we believed polyethylene(thickness 0.03 mm) package,namely combine the O2(16.0±0.31)% and CO2(4.37±0.17)%,was suitable for storage and freshness of ’Friar’ plum.However,three types of MAP were not ideal for the storage of ’Angeleno’ plum.