Small-package controlled atmosphere preservation method of sweet cherries

Abstract

The invention relates to a small-package controlled atmosphere preservation method of sweet cherries. The small-package controlled atmosphere preservation method comprises the following steps: in the morning of sunny days, picking sweet cherries which have mid-late maturity varieties, have no mechanical loss and rot, and have uniform color and luster; storing at 25 DEG C for 5 days; determining the rot rate, color difference and hardness of the sweet cherries before and after storage; taking the sweet cherry variety with the change of three indexes, which is less than 10%, as a small-package controlled atmosphere preservation variety; in the morning of sunny days, picking the sweet cherries and keeping stems of the sweet cherries; selecting the sweet cherries with uniform color and luster and eliminating the sweet cherries with the mechanical loss and rot; putting the sweet cherries into pre-cooling air drying equipment, washing the sweet cherries with cold water and pre-cooling the sweet cherries to 2-7 DEG C; drying the sweet cherries with air until no water is remained and immediately carrying out the next step; taking 200g of the sweet cherries which are dried with the air and putting the sweet cherries into a polypropylene package box which is internally padded with water absorption paper; packaging the box by using a controlled atmosphere packaging machine, wherein the volume percent of mixed gas in the packaged polypropylene package box is as follows: 3%-7% of O2, 10%-20% of CO2 and the balance of nitrogen gas; and putting the sweet cherries subjected to controlled atmosphere packaging into a refrigeration house at a temperature ranging from -1 DEG C to 1 DEG C and storing.

Description

technical field [0001] The invention relates to a modified atmosphere fresh-keeping method for sweet cherries in a small package, and belongs to the technical field of fruit and vegetable fresh-keeping. Background technique [0002] Sweet cherry, also known as big cherry, European sweet cherry, is a plant of the Rosaceae, Prunus, and Cherry subgenus. It is native to Europe, Northwest Africa, and West Asia. It was introduced to China in the 1870s. According to "Manchurian Fruit Trees" in 1915, in 1871, American missionary J.L.Nevius brought in the first batch of 10 varieties of sweet cherry seedlings, sour cherries and hybrid cherry seedlings and planted them in the Southeast Mountain of Yantai, Shandong. Sweet cherry is the earliest fruit tree species of deciduous fruit trees in northern China after Chinese cherry. The cherries cultivated as fruit trees in China include Chinese cherries, sweet cherries, sour cherries and cherries. Compared with the other three types of cher...

AI Technical Summary

Problems solved by technology

[0003] Sweet cherry fruit is thin and juicy, and it is harvested in high temperature and high humidity season. After harvest, problems such as rot, browning, dehydration, and softening are prone to occur, and the harvest period is concentrated. It is difficult to meet the needs of fresh eaters, and the It is difficult to improve the economic benefits of the cherry industry

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