The broccoli has a high nutritional value and is a high-end commodity in the international market. It is more popular than broccoli. In the 1980s, China introduced a large number of successful crops, and domestic sales gradually increased. It is also one of the major vegetable varieties for export.

Storage characteristics

Because of its edible part, the broccoli is a young peduncle and small flower bud. After harvesting, the flower bud is easy to open and yellow at room temperature, which is more difficult to keep fresh than broccoli.

2. Storage process

(1) Harvesting and post-harvest treatment The broccoli should not be watered for 2 days before harvesting. Spraying the flower ball in the field with 10-20mg/L6-BA on the day of harvest or the first day of the harvest can delay the discoloration and aging of the post-harvest flower buds and bracts. It can also be treated with preservative (20mg/L6-BA+0.2% sodium benzoate) after harvesting, but the floating water should be dried before being stored in the warehouse. The broccoli used for storage requires that the flowers of the flower head are compact, green, clean, mold-free, and free of insects.

(2) Pre-cooling and packaging After the broccoli is selected, it should be pre-cooled into the pre-cooling warehouse immediately after dressing and fresh-keeping treatment. Many tests have shown that the most critical measure to prevent discoloration, aging and prolonged shelf life of broccoli is to be in a low temperature condition as soon as possible after harvesting. At room temperature (20-25 ° C) 1-2d flower buds will lose green to yellow, so it is best to fall to 1-2 ° C within 3-6h, through -17 ° C low temperature rapid pre-cooling method can be within 5h Reduce the temperature of the dish to a low temperature. The packaging of broccoli can be directly packed in polystyrene foam box. It can be immediately put into the warehouse after packing, or it can be packed with 0.03mm thick polyethylene film single flower ball. If necessary, 2 small holes can be taken on the bag. Good spontaneous gas tone. Packed with a polyethylene bag and a silicone rubber window, that is, a silicon window method, the CO2 concentration can be controlled at 5%-10%, and the storage effect is better.

(3) Storage and transportation The maximum storage temperature of broccoli is 0-1 ° C, and the humidity is 90%-95%. Under the environment, the above package can be stored for 30-45 days. The transportation of broccoli also requires a refrigerated truck, and the temperature should not be higher than 15 °C, otherwise the small flower buds will quickly yellow. For the storage and transportation without refrigeration equipment, ice cubes can be cooled in the package in time after harvesting. The amount of ice added accounts for 1/3 to 2/5 of the total volume of the tank and is delivered to the destination as soon as possible.

During the storage period, broccoli has a certain release of ethylene. This gas accumulates in the storage environment, which will accelerate the aging of flower buds. Attention should be paid to proper ventilation during storage management.