Controlled atmosphere preservation method of Capsella bursa-pastoris

Abstract

The invention provides a controlled atmosphere preservation method of Capsella bursa-pastoris, comprising the following steps: S1, picking and sorting Capsella bursa-pastoris to be preserved; S2, precooling the picked and sorted Capsella bursa-pastoris with a vacuum precooler to 2-4 DEG C; S3, quickly loading the precooled Capsella bursa-pastoris in vacuum package at 10-20 DEG C under the humidity of 60-80%; S4, mixing well CO2, O2, O3 and N2 gases with a gas proportional mixer according to a proportion, wherein by volume, CO2 is 5-15%, O2 is 1-15%, O3 is 1-5% and N2 is 65-93%; S5, evacuating vacuum packaging bags loaded with base material in step S3 by using a controlled atmosphere packaging machine, charging mixed gas of step S4 into the bags, and heat-sealing the bags; S6, cold storing the Capsella bursa-pastoris packaged in step S5 in a constant-temperature constant-humidity box at 2-6 DEG C under the humidity of 70-80%.The method enables the shelf life of Capsella bursa-pastoris to be prolonged from 2-3 days at normal temperature to longer than 30 days and enables Capsella bursa-pastoris to still be in good quality of goods and vendibility.

Description

technical field [0001] The invention relates to a method for storing and keeping fresh vegetables, in particular to a method for keeping shepherd's purse fresh through controlled atmosphere. Background technique [0002] Shepherd's purse, also known as protective grass, ground vegetable, ground rice vegetable, water chestnut, etc., is a cruciferous, shepherd's purse genus, one or two-year herbaceous plant. It grows in fields, roadsides and gardens, and feeds on young leaves. Its nutritional value is very high, containing 85.1 grams of water per 100 grams, 5.3 grams of protein, 0.4 grams of fat, 6 grams of carbohydrates, 420 mg of calcium, 73 mg of phosphorus, 6.3 mg of iron, 3.2 mg of carotene, and 10.14 mg of vitamin B. Niacin 0.7 mg, vitamin C 55 mg, also contains flavonoid glycosides, choline, acetylcholine and so on. Shepherd's purse is rich in vitamin C and carotene, which helps to enhance the body's immune function. It can also lower blood pressure, invigorate the s...

AI Technical Summary

Problems solved by technology

However, because shepherd's purse is fresh and tender in texture, it is very easy to lose water and shrink, and it is also susceptible to mechanical damage to cause rot and deterioration. It will turn yellow and deteriorate within 2 days at normal temperature after harvesting, reducing its edible quality and sales value.