How to store kiwifruit? Remember these key points for keeping it fresh
Precooling: Where a precooling room is available, cold air at a flow rate of 0.75 liters/second?kilogram can be supplied, lowering the fruit temperature from 25°C-30°C to 3°C-4°C over 8-10 hours, and then it is moved into the cold storage. Where no precooling facility is available, the fruit can be placed in a cool, ventilated spot and precooled overnight, then sent into the cold storage early the next morning, and then lowered to...
Precooling: Where a precooling room is available, cold air at a flow rate of 0.75 liters/second?kilogram can be supplied, lowering the fruit temperature from 25°C-30°C to 3°C-4°C over 8-10 hours, and then it is moved into the cold storage. Where no precooling facility is available, the fruit can be placed in a cool, ventilated spot and precooled overnight, then sent into the cold storage early the next morning, and then lowered to the suitable storage temperature over 24 hours.
Temperature and humidity control: The most suitable relative air humidity for refrigerated fruit is 90%-95%, and the storage temperature should not be lower than -1.5°C, so as to avoid freezing damage. Storage fruit is packed in bamboo or wooden boxes, stacked 2-4 layers high and 1.5-2 m wide, with a 1.5 m wide walkway left between two rows of stacks. Refrigerated fruit must strictly not be packed in breathable plastic (11340,-15.00,-0.13%) film or bags. The cold storage is generally ventilated once every 3-5 days, the carbon dioxide concentration in the storage is maintained at 50%, and the oxygen concentration is best kept below 1.5%. Sponge bricks fully soaked with potassium permanganate solution are placed separately in the cold storage, which can remove part of the ethylene and has a certain effect on extending the storage period.
Anti-corrosion treatment: Soak the fruit in a 0.2% sodium erythorbate solution for 5 minutes, drain, and then pack it in polyethylene bags, 1 kilogram per bag; Jing 2B (diluted 1:20) plus 200 mg/kg 2,4-D and 50 mg/kg thiophanate-methyl, or 250 mg/kg carbendazim can also be used to replace thiophanate-methyl.