Taking American plums Queen as the experiment material, the effects of different storage temperatures,packaging materials and whether spraying agent before harvest on firmness,Total Soluble Solid (TSS) contents as well as the changes of storage quality of American plums Queen were studied. The results indicated that low temperature,package treatment and Spraying gibberellin or ˊZhixinˊ calcium boron calcium before harvest are helpful to prolong the storage time of postharvest fruits. The storage at four degree Celsius can effectively delay the decline of fruit firmness and TSS contents, and it can more effectively delay the rate of fruit decay as well as the occurrences of browning at zero degree Celsius. On the packaging material,the treatments of silicone window bagged fruits plus ethylene absorbent are superior to others,furthermore, spraying gibberellin or ˊZhixinˊ calcium boron calcium twice before harvest is contribute to reducing the decay rate of fruits during storage.
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