Vegetable packaging refrigeration technology

Parsley, spinach, and celery are cold-tolerant green leafy vegetables. In the past, natural cold storage was used. This method is often severely lost due to high and low temperatures after storage. The use of small package refrigeration, the method is simple, long storage period, good quality and high economic efficiency. Using this method to store coriander for 3 months, the commodity rate reached over 90%; for 2-2-3 months, spinach was stored at a rate of 80%-90%; for 2 months when celery was stored, the commodity rate was about 90%.

The main points are:

1, field management and harvest. Parsley, spinach, and celery used for storage should be sown late. The water and fertilizer management should be strengthened during the growth period, and 2 to 3 seedlings should be carried out during the period. Harvesting should be stopped in advance and timely harvested. Do not take dew, pay attention to handle it lightly, with short roots.

2, processing pre-cooling. After the parsley, spinach and celery are harvested, they should be selected and processed in time. The proper storage of parsley and spinach will be bundled into small pieces of about 0.5 kg. The celery is bundled into small pieces of 1-1.5 kg, and then sent to the cold store for rapid and adequate pre-cooling.

3, packaging management. Pre-chilled parsley, spinach, and celery should be promptly packed into non-toxic plastic film bags. Each bag of parsley or spinach 10 kilograms, celery 12.5-15 kilograms, tie bag mouth placed on the shelf, you can long-term storage. Because these vegetables have high respiratory intensity and poor tolerance to hypoxia and high carbon dioxide, the interval between each ventilation should be appropriately shortened. In order to simplify the operation of gas regulation, it can be stored using a bag pocket and automatic gas regulation method with good results. The diameter of each type of strapping bag varies according to the variety characteristics.

4, inspection, sales. For the storage period of parsley, spinach, celery, should always pay attention to quality inspection, if it is found that black leaves and yellow leaves to be processed in a timely manner, the library requires a constant temperature, the lower the temperature is better under the premise of not being frozen, including parsley and spinach Storage temperature can be lower, that is, stems and leaves with frosted flowers is appropriate.