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Preservation method of fresh jujube

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Others gave a big bag of fresh jujube, which can’t be eaten for a while. How should I keep it?

1. Fresh jujubes are generally stored in cold storage. The jujube frozen in the refrigerator can make it taste better, and can effectively ensure that the fresh jujube will not dry and reduce its nutrition

2. Sand hiding method. Choose a cool and humid place, the bottom layer of 3cm thick wet sand, put a layer of fresh jujube, then a layer of sand, then the second layer of jujube, then sand, and then the third layer of jujube. In order to prevent the sand from drying, the surface can be watered to supplement the humidity

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3. Keep in a fresh-keeping box. Fresh dates can be put into fresh-keeping bags or boxes, and then stored in a cool and ventilated place

4.& nbsp; Blanch the fresh jujube in boiling water, then quickly take out the red jujube, pour dry water and dry it in the sun, which can kill the bacteria on the surface of the red jujube, and store it in a dry and moisture-proof sealed container to avoid insects or deterioration of the red jujube

5. Drying. Put the dried fresh jujube into the bag, sprinkle a little Baijiu, tighten the bag mouth, do not leak, so that it can keep insects for no years, and can be eaten at any time. p>

extended data:

fresh jujube is not a tonic, not a medicinal material, but a delicious fruit. Its vitamin C content is the highest among the fruits we often eat

the benefits of jujube are not limited to these. The antioxidants are classified into flavonoids, rutin and saponins, which have a certain health care effect on the human body

I. freezing

fresh dates are generally stored in cold storage. Before cold storage, the pre stored fresh dates should be pre cooled at a temperature of 5-8 ℃ for one or two days. Before precooling, soak the fresh jujube in 2% calcium chloride solution for 30 minutes. After precooling, the fresh jujube should be stored in a cold storage with a temperature of 0 ℃ ~ 1 ℃ and a relative temperature of 90% ~ 95%

II. Refrigerate in the refrigerator

the method of family preservation is generally to use the refrigerator. Pick out the winter jujube that is not all red, seal it with a plastic bag, leave a small amount of air in the bag, seal it, and then put it in the refrigerator with a temperature of 0 ℃ – 4 ℃. However, it is suggested that when packing plastic bags, it is best to use small bags for sub packing, so that you only need to open a small bag each time to eat, which can be stored for a longer time

III. vacuum preservation

use vacuum packaging method. Use airtight food bags to put fresh dates, use vacuum packaging machine (sold in the market for household use) or vacuum cupping device to extract the air from the bag and seal it. Food bag sealing machines are also available. They are very cheap, or they can be sealed by heating with a saw blade

IV. sand storage

select storage resistant varieties, harvest at the beginning of red to half red, select harmless jujube fruits, choose a cool and humid place, lay 3cm thick wet sand on the bottom layer, put a layer of fresh jujube (the thickness of one jujube), then lay a layer of sand, then put the second layer of jujube, then lay sand, and then put the third layer of jujube, so as to stack to 30cm high. In order to prevent the sand from drying, the surface can be sprayed with clean water to supplement the humidity. This method can be stored for more than one month, the jujube fruit is fresh, tender, crisp and sweet, and the nutritional loss is less

extended data:

how to save fresh dates for a long time –

1 The time of collection must be correct. Generally, the lower the maturity, the more resistant to storage. The varieties of storage include winter jujube, xifengshan jujube, xifengshan Xiaoya jujube, Tuan jujube, toad jujube, pointed jujube, wood jujube, October red, etc

2. However, if it is harvested too early, it will have low sugar content, poor flavor, less nutrient accumulation, vigorous respiratory metabolism and more substrate consumption. In addition, the development of protective tissue on the surface of jujube fruit is not perfect, the water holding capacity is poor, and it is easy to lose water; Too late harvest, low fruit vitality, poor resistance to adverse external conditions and poor storage resistance. Therefore, fresh edible varieties should be harvested in the half red stage. Generally, the method of water spray cooling or water immersion cooling is used for precooling, in order to avoid bringing a large amount of field heat into the fruit, weaken the respiration and prolong the storage period

3. Soaking fruits with calcium chloride or spraying calcium chloride, gibberellin or methyltobuzin before harvest can prolong the storage period. Calcium can change the ratio of water-soluble and non-water-soluble pectin in jujube fruit, and make most of the pectin become non-water-soluble; Secondly, calcium is fixed on the exchange point between protoplast surface and cell wall, reducing its permeability and weakening respiratory function

reference: fresh jujube Baidu Encyclopedia


preservation method of fresh jujube:

1. Select the fresh jujube after purchase, and pick out the bad jujube with bruises on the surface or with black spot insects, so as to avoid the bad jujube containing mold infecting other fresh jujubes during storage

2. The method of keeping fresh jujubes in the family is generally to use the refrigerator. Among the fresh jujubes bought back, pick out the ones that are fresh and intact and whose peel is not all red, seal them with plastic bags, leave a small amount of air in the bags, seal them well, and then put them in the refrigerator with a temperature of 0 ℃ – 4 ℃. When packing plastic bags, it is best to use small bags for sub packing. If you open a small bag each time, you can keep the fresh dates longer

3. If you don’t use a refrigerator for storage, you can also put the fresh jujube in a fresh-keeping bag or box, and then store it in a cool and ventilated place, so as to maintain the freshness of the fresh jujube

4. If there are a large number of fresh jujubes, the fresh jujubes to be stored should be pre cooled at the temperature of 5-8 ℃ for 1-2 days before refrigeration. After precooling, the fresh jujube can be stored in a cold storage with a temperature of 0 ℃ – 1 ℃ and a relative humidity of 90% – 95%

extended data:

fresh jujube is not only sweet, crisp and juicy, but also rich in nutrition. Among them, the content of vitamin C is the highest, so it is known as “vitamin pill”. According to the determination, there are 243 mg of vitamin C, 18-23 g of carbohydrates, 0.86 g of crude protein in every 100 g, and the contents of vitamins A1, B1, B2 and K are also quite rich. It also contains far more carotene necessary for human body than other jujube products. The contents of fructose and glucose are 11-16%, and the soluble solids are 14-20%. In addition, it also contains trace elements such as phosphorus, calcium, iron, potassium and zinc

fresh jujube fruit has delicious taste and rich nutrition. It has health care functions such as purifying blood, helping digestion, nourishing beauty and so on; In addition, fresh jujube is neither cold nor hot. It has the effects of cooling, detoxification and sedation; And crisp and juicy, high sweetness, good taste and unique flavor. However, it should be noted that fresh dates are not resistant to preservation, and they will lose their crisp taste in a few days at room temperature. Therefore, after buying fresh dates, they should be eaten as soon as possible, which can prevent the loss of fresh dates’ nutrition and avoid the deterioration of fresh dates caused by improper storag
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reference: People’s Daily – there are many functions of eating fresh dates in autumn. How should fresh dates be preserved

preservation method of fresh jujube:

1. Sand storage

select storage resistant varieties, harvest at the beginning of red to half red, select harmless jujube fruits, choose a cool and humid place, lay 3cm thick wet sand on the bottom layer, put a layer of fresh jujube (the thickness of one jujube), then lay a layer of sand, then put the second layer of jujube, then lay sand, and then put the third layer of jujube, so as to stack to 30cm high. In order to prevent the sand from drying, the surface can be sprayed with clean water to supplement the humidity

2. Fresh dates are generally stored in cold storage. Before cold storage, the pre stored fresh dates should be pre cooled at a temperature of 5-8 ℃ for one or two days. Before precooling, soak the fresh jujube in 2% calcium chloride solution for 30 minutes. After precooling, the fresh jujube should be stored in a cold storage with a temperature of 0 ℃ ~ 1 ℃ and a relative temperature of 90% ~ 95%

3. Refrigerate

the method of family preservation is generally to use the refrigerator. Pick out the winter jujube that is not all red, seal it with a plastic bag, leave a small amount of air in the bag, seal it, and then put it in the refrigerator with a temperature of 0 ℃ – 4 ℃. However, it is suggested that when packing plastic bags, it is best to use small bags for sub packing, so that you only need to open a small bag each time to eat, which can be stored for a longer time

extended data

fresh jujube has high nutritional value. It is rich in essential organic acids, carotene, protein, iron, calcium, phosphorus, selenium and other trace elements, rich in vitamin C, and contains nutritional components such as “cyclic adenosine monophosphate” and “glucoside”. It has magical effects on beauty and health care, treatment of hypertension and prevention of cancer. Therefore, there is a famous saying in the world: “eat three jujubes a day and don’t grow old all your life”

fresh jujube (also known as fresh jujube) refers to the jujube fruit directly picked from the jujube tree without processing. The nutritional value of fresh jujube is much higher than that of dry jujube, but it is not conducive to preservation due to the defects of preservation technology. Therefore, the fresh-keeping period of fresh jujube is relatively short, so it is recommended to pick and eat immediately

reference

Baidu Encyclopedia fresh jujube

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