Pingguo eat endless? Refrigerator preservation method must see
How did you spend on a romantic Christmas Eve? However, you shouldn't forget "safe fruit." Ping'an's homonym means peace. Just on the day before Christmas, it became a day closely related to Christmas. But how does Apple buy? How to store apples correctly? Xiao Bian will briefly introduce it.
First, the storage temperature
Appropriate storage temperature can minimize the metabolic consumption of apple, but it will not cause cold damage. Most of the apple varieties have a suitable refrigerating temperature of 0 to -1°C, and the temperature of the modified atmosphere storage can be 0.5 to 1°C higher than that of refrigerating. Appropriate low temperature can alleviate the diseases of apple such as tiger skin disease, spot disease, bitter pit disease, aging and browning, and it can also inhibit the activity of bacteria to a certain extent and reduce the microbial disease.
Second, the storage humidity
Apple has a long shelf life. Therefore, it is required that the humidity of the storage environment must be high. When the relative humidity reaches 85%-95%, evaporation of moisture can be reduced, and the fresh and full fruit state can be maintained. When the apple's water loss rate reaches 5%-6%, the skin will shrink, affect the appearance quality, speed up the respiration of the fruit and mature aging. Humidity is not only conducive to bacterial activity, it can also lead to some physiological diseases, and sometimes even lead to cracking. Some species are more sensitive to temperature, and long-term storage below 0°C will lead to physiological problems such as fruit core, pulp browning and so on. Therefore, its storage temperature is preferably in the range of 2- 4°C.
Third, Apple's main ingredients
Apples are typical respiratory-climacteric fruits, and changing the gas composition of the storage environment has a particularly significant effect on improving the storage and preservation effect. It is generally considered that when the storage temperature is 0-2°C, the oxygen content is 2%-4%, and the carbon dioxide content is 3%-5%. However, there are differences in the suitable gas composition of different species. According to the sensitivity to gas composition, apples are divided into three types: one is insensitive, and it can tolerate hypoxia (1%-2%) and high carbon dioxide in the early stage of storage ( 10%-20%), this type of Marshal series (Marshal, Red Star, New Red Star, Brilliant Red, First Red, Super Red, Red Crown, etc.), Golden Delicious, Jonah King, Green Banana, Brocade, Red Jade et al.; two are sensitive, during the entire storage period, the concentration of carbon dioxide can not exceed 3%, the concentration of oxygen can not be less than 3%, otherwise it will occur physiological damage, this type of species has Fuji series (Qingfu, long Rich), red India, jade, etc.; three for the intermediate type, in the early storage of oxygen can not be less than 2%, carbon dioxide can not be higher than 8%, storage of carbon dioxide can not be higher than 4%. Apple is sensitive to ethylene and must take measures to control the production and action of ethylene during storage. Atmosphere storage can reduce the production of ethylene, and ethylene desorbers or absorbents are also used to reduce the ethylene content of the storage environment during storage.
YT-T11
YT-T11
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