Cold Room For Winter Dates

Winter dates is rich in nutrition, but not resistant to storage. After the storage of natural conditions,fresh crisp only about a week. In recent years, with the development of cold storage technology, the preservation period can reach 70-120 days.

The suitable conditions of winter dates are described as follows.

1, Harvest time of winter dates cold room . Harvest maturity has a great impact on the life of storage , that is, the lower the degree of maturity, the more resistant to storage, to the early red fruits (colored below 25%) the most resistant to storage, all red fruit (100 coloring) the most resistant to storage. For the purpose of fresh storage, semi red harvest, for the purpose of processing, the initial red harvest, short-term storage can be a full harvest.

2, The temperature and humidity of winter dates cold room . In the temperature range above the freezing point temperature of winter dates, the lower the temperature, the better the storage effect. Different degrees of maturity of winter dates, there are differences in the freezing point, usually half a day of freezing point of about - 2.4 degrees celsius. Full day freezing point lower than this value. Therefore, different maturity dates should be stored separately. Winter dates is a kind of fruit which is easy to lose water, and the suitable humidity for the winter dates is 90% - 95%.

3,O2, CO2 content in winter dates cold room conditions. O2 content should be controlled at 3% - 6%. The storage environment of high precision temperature control, O2 content should be low, so that can improve the quality of preservation. In the storage environment with high temperature error, the O2 content should be high, in order to prevent anaerobic respiration or CO2 poisoning.
The dates tree is very sensitive to CO2, not fully sealed storage, higher than 5% of the CO2 content will accelerate dates softening browning, the content of CO2 for 2%~4%. With 0.05mm thick PVC punching bag packaging, can prevent CO2 Poisoning, but also can keep the bag humidity.

After winter dates harvest, it is usually stored in cold storage, which can inhibit the production of ethylene in winter dates. Cold storage temperature of 1 degrees Celsius for the best, the relative humidity should be maintained at about 98%.
Winter dates is fresh food variety, by hand picking, their maturity is not the same even the same tree, can harvest according to the actual situation. Staged recovery can not only improve the yield, but also can improve the quality .