How to store fresh jujubes and how to preserve fresh jujubes

Fresh jujube is the jujube picked from the tree, which has not been sun-dried, has sufficient moisture, and tastes fresher. Compared with dried dates, fresh dates are more delicious, but they are also more difficult to preserve. So, how do you preserve fresh dates? Can I keep it in the refrigerator?

What is a fresh date.

Fresh jujube (also known as fresh jujube) refers to the jujube fruit that has not been processed and directly picked from the jujube tree. The nutritional value of fresh jujube is much higher than that of dried jujube, but it is not conducive to preservation due to the defects of preservation technology. Therefore, the shelf life of fresh jujube is relatively short, and it is recommended to pick and eat immediately.

There are many varieties of fresh jujubes, among which there are many excellent varieties, such as early and medium early varieties such as early crispy king, milk fragrant jujube, Ningyang June fresh, Xinzheng June fresh, to the mouth crisp, honey pot, pimple crispy, etc.; Medium-ripening and medium-late ripening varieties include large melon jujube, big white bell, Linyi pear jujube, and chili jujube; Jujube, no crisp, Chengwu winter jujube; Late-maturing varieties include winter jujube, Xingtai September green and so on.

How to store fresh dates.

1. After the fresh jujube is purchased, it is necessary to select the bad jujube with bruises on the surface or with black spots and insects, so as to avoid the bad jujube containing mold from infecting other fresh jujube during storage.

2. The method of preserving fresh jujube at home generally uses the refrigerator, in the fresh jujube bought, pick out the fresh and intact and the peel is not all red, seal it with a plastic bag, leave a small amount of air in the bag, seal it well, and then put it in the refrigerator with a temperature of 0 4 to refrigerate. When packing plastic bags, it is best to divide them into small bags, and each time you open a small bag to eat, you can keep the fresh dates for a little longer.

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

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

It can be sealed in a plastic bag and put it in the refrigerator for storage, pay attention to ensure that there is no moisture on the surface of the jujube, and pick out the ones that have become soft or bruised, the temperature in the refrigerator is low, which can inhibit the growth and reproduction of bacteria, and can generally be stored for about 1 week.

The preservation method of fresh jujube is as follows:

1. Cellar storage.

The farmer's cellar can also be used for short-term storage of fresh dates. Put the fresh dates harvested in time into thinner convenience bags, kilograms per bag, and the mouth of the bag should not be tied tightly, or 2 holes should be punched on each side of the bag to prevent carbon dioxide damage, which can keep the fresh dates fresh for a month.

2. Hidden in the shade and sand.

This method can keep fresh dates fresh for a month, in a cool and damp place, spread a layer of 3 cm thick wet sand, put a layer of selected fresh dates on top, then spread a second layer of sand, and put another layer of dates, so that the pile is 30 50 cm high. To prevent the sand pile from drying out, spray the sand pile regularly with a small amount of clean water.

3. Wine cellar. First, put the fresh jujube into the liquor, soak it, take it out immediately, put it in a porcelain or glass container, add wine after filling, then seal it, and store it in a cool and dark place. However, it is necessary to pay attention to the concentration to prevent the wine from becoming worse in jujube flavor.

If the amount of alcohol is insufficient, it will not play the role of sterilization and antiseptic. If you use sorghum wine to store fresh dates, the flavor is better. This can be stored for 4-7 months.

4. Refrigerate.

The method of home preservation is generally to use the refrigerator, pick out the winter dates that are not all red, seal them with a plastic bag, leave a small amount of air in the bag, seal them well, and then put them in the refrigerator with a temperature of 0 -4 for refrigeration. However, it is recommended that when packing plastic bags, it is best to divide them into small bags, so that you only need to open one small bag at a time to eat, and you can keep it for a longer time.

Long-term storage methods of fresh jujubes: 1. Pick out the bad jujubes before storage and choose shelf-stable varieties; 2. If there are more dates that need to be preserved, they should be pre-cooled first; 3. After the plastic bag is sealed, put it in the refrigerator for refrigeration, and the relative humidity in the plastic bag is kept above 90%.

Efficacy and role of fresh jujubes:

1. Fresh jujube can improve human immunity, and jujube can also inhibit cancer cells, and even make cancer cells transform into normal cells.

2. Fresh jujube is very rich in vitamin C, so people who regularly eat fresh jujube rarely suffer from gallstones, the principle is that jujube converts excess cholesterol in the body into bile acid, and the probability of stone formation is reduced when there is less cholesterol.

3. It also has a good tonic effect on people who are weak after illness.

4. The rutin contained in fresh jujube can soften blood vessels, thereby lowering blood pressure and preventing hypertension.

Fresh jujube avoidance crowd:

1. Abdominal flatulence: Eating too much fresh jujube will cause flatulence, abdominal distension and stagnation and pregnant women with abdominal distension are all contraindicated.

2. Menstruating women: fresh jujube is warm, and people with hot body should not eat more. Female friends with hot and dry constitution are not suitable to take fresh dates during menstruation, because it is likely to cause excessive menstrual bleeding and damage to physical health.

3. Patients with stomach disease: the skin of fresh jujube is hard and extremely difficult to digest, so it must be fully chewed when eating, otherwise it will aggravate the burden of the gastrointestinal tract and affect the absorption of nutrients.

4. Diabetic patients: Because the sugar content of fresh jujube is more, the sugar content is more than 20%, so if the diabetic patient does not eat excessively, it will damage the effect of pancreatic islets, cause blood sugar and urine sugar to rise rapidly, and aggravate the condition.

How should I store dates?

1 3 Step by Step Reading.

1. Refrigeration method.

Before storage, the jujube is pre-cooled and disinfected, the storage temperature is reduced to -2 degrees before pre-cooling, and the temperature in the storage temperature is kept at 0 degrees during pre-cooling, and at the same time, it is fumigated and sterilized with TBZ fog agent (3-6G M), and the jujube fruit is packed in the warehouse after pre-cooling, and the perforated polyethylene film bag is lined with the lining. After the jujube is put into storage, it should be cooled down quickly, and the storage temperature is required to be 0 degrees, and the warehouse temperature is -1 degree.

Temperature is the most important environmental factor affecting the storage life of fresh jujube. The lower the temperature in a certain temperature range, the better the storage effect, below 0 degrees, the respiration intensity of jujube is less than 50% of the respiration intensity of jujube at 20 degrees, and the low temperature can slow down the transpiration rate of fruit moisture and inhibit microbial activity. However, if the temperature is lower than the freezing point of jujube fruit, it will cause frostbite to jujube fruit, and the freezing point of different jujube fruit is different, which needs to be further studied.

2 3 Second, the traditional practice of preserving jujubes.

Mainly the fresh jujube is dried into jujube or made into drunk jujube and candied jujube and other processed products, used for preservation, although the sugar content of jujube is high and resistant to storage and transportation, but the VC content is only mg g, reduced to less than 5% of the VC content of fresh jujube, the vc content of candied jujube can be maintained at 2mg g, but the processing of fresh jujube should be short and seriously affects the yield of candied jujube.

3 3 Fourth, the modified atmosphere method.

By adjusting the gas components in the storage environment of jujube, the respiration of the fruit can be regulated, and the growth and reproduction of microorganisms can be inhibited, so as to achieve the purpose of preservation

Dried jujube is stored in the north, and when stored in large quantities, sacks are used for stacking. When stacking, there should be a ventilation gap between bags and between stacks to facilitate ventilation. The walls are somewhat damp, so don't get too close to the walls.

During the mildew summer, one is to put a sack on top of each bag of dried dates, which is conducive to isolating moisture. The second is to pay attention to closing the doors, windows and ventilation holes of the warehouse. When the outside temperature is low and dry, the air in the warehouse is discharged and replaced with dry air.

Lime moisture absorption points are set in the warehouse, which can significantly reduce humidity.

When the storage capacity is small, it can be stored in the cylinder (altar), and the mouth of the cylinder (altar) is tightly sealed with plastic film and placed in a cool place to spend the summer safely.

In the south, high temperature and humidity, mildew season should be stored in cold storage. Dried dates are packed in sacks and stored in the warehouse of 5 . Before leaving the cold storage, it should be moved to a slightly higher temperature place for transition, and gradually moved to the outside of the warehouse.

In order to prevent the condensation of water from the jujube fruit into water droplets, do not re-bag it immediately, but spread it out, wait for the condensation droplets to disappear, and then change the bag to package it for shipping.

A small amount of dried jujube can be stored with rice husk ash. Sprinkle dry rice husk ash about 1 cm thick on the ground, spread a layer of dried dates, then sprinkle rice husk ash to cover the dried dates, and then spread a layer of dried dates. Such a layer of rice husk ash and a layer of dried jujubes can be stacked 30 40cm high.

This storage method can prevent moisture and sterilization, and the jujube grains are dry, and the effect is better.

1) Put it in the sun for a few days, in order to prevent the jujube skin from darkening, you can cover a layer of mat on the jujube, dry it and put it into the jar after cooling; Or spread it out in a cool and ventilated place for a few days, and put it in a tank after drying. Then, cover with a wooden lid. You can also mix plant ash in the jujube and put it in a bucket to cover.

2) Use 30 to 40 grams of salt, fry and grind into powder. Put 500 grams of red dates in layers and salt them in a jar and seal them, so that the dates will not be bad and will not become salty. If there are many dates, the salt will be increased according to the above proportion.

How to preserve fresh jujube best.