First, be careful to harvest: Apples used for storage should be picked on sunny days and dried dew in the morning. Do not pick up apples in the morning when the temperature is lower than 2°C. Otherwise, they will not be able to store them. When harvesting, it should be handled with care, to prevent injury to the fruit surface and to infect the disease, and to strictly select the pest, fruit, broken fruit, fruit and small fruit. Second, post-harvest treatment: with 3% -6% calcium chloride solution dipping fruit, can increase fruit hardness, reduce the fruit storage period due to calcium deficiency caused by bitter disease and other calcium deficiency disorders; with 25% Baoguo Ling 250 times Soaking in liquid for 0.5-1 minutes or dipping with 70% thiophanate-methyl 300-500 times can prevent saprophytic bacteria from infecting fruit during storage. Third, in-situ precooling: After the treatment of the apple, first scattered in the orchard precooling heat one night, and then grading, packaging storage. Fourth, improve packaging: In the past two years, the use of plastic film storage bag storage apple, the effect is very satisfactory, the principle is: rely on the respiration of the fruit itself to reduce oxygen, increase the concentration of carbon dioxide, and the use of plastic film permeability of the gas, Change the gas composition of the storage environment and achieve spontaneous air conditioning. Using this method to store apples for 3-6 months, the loss rate does not exceed 5%. The method is to use a 0.04-0.07 mm thick non-toxic PVC plastic film bag lined in the fruit box, wait until the apple lined up and then fold the bag in the box and seal it. Be careful not to fasten the bag mouth. 5. Timely storage: Apple is a kind of fruit with rapid breathing. After harvesting at room temperature, the amount of ethylene produced will increase many times. Using gas analysis instruments, the amount of ethylene produced can be increased by 22 ppm up to 10-17 days after picking. As high as 1680 ppm, breathing changes, and the fruit begins to age and develop lesions. If the fruit hardness is used as an indicator, the apple will be stored at room temperature for a day after harvest, and its cold storage life will be reduced by more than 20 days. Therefore, Apple should promptly store it after packaging.
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