How to preserve fresh dates, how can fresh dates be stored for a year

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.

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.

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

After picking the fresh jujubes, select them, pick out the bad jujubes with bruises on the surface, or have black spots and insects, and the method of preserving fresh jujubes can generally use the refrigerator, in the fresh jujubes bought, the fresh and intact and the peel is not all red to pick out, 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 for refrigeration.

Fresh jujubes should choose fresh jujubes with high maturity and freshness, that is, the skin color is purple red, the particles are full, and they are shiny; The skin of the fruit is green and lusterless, and it is a raw date. If the skin color is red with rust stripes or spots, it is a jujube that has been stored for a long time; If the skin is too wet or has rotten spots of different sizes, it must be a fresh jujube that has been watered.

1.Fresh jujube preservation is generally refrigerated, and frozen jujube in the refrigerator can make it taste better, and can effectively ensure that fresh jujube does not dry up and reduce its nutrition.

2.Sand storage method. Choose a cool and damp place, the bottom layer is 3 cm thick wet sand, put a layer of fresh dates, then a layer of sand, then a second layer of dates, then sand, and then a third layer of dates. To prevent the sand from drying out, the surface can be sprinkled with water to replenish the humidity.

3.Keep in a crisper box. You can put fresh dates in a fresh-keeping bag or crisper box, and then store them in a cool and ventilated place.

Can be refrigerated. Refrigeration is the best way to preserve fresh dates, generally after the fresh dates are picked, there is only a shelf life of about a week, only refrigeration can extend this time, put the fresh dates in a plastic bag and seal them, and then put them in the refrigerator freezer, the temperature is set at about 1, so that the dates will not be frostbitten, and they can also maintain the freshness and crispness.

Other ways to save it1. Sand storage. Select storable varieties, harvest at the beginning of red to semi-red, select harmless jujube fruits, choose a cool and damp place, lay 3 cm thick wet sand on the bottom layer, put a layer of fresh jujube (the thickness of a jujube), and then lay a layer of sand, then put the second layer of jujube, then spread sand, put the third layer of jujube, and so pile to 30 cm high. for anti-sand.

Dry, the surface layer can be sprayed with clean water to replenish humidity. This method can be stored for more than a month, the jujube fruit is tender, crisp and sweet, and the nutrient loss is less.

2. Gas reservoirs. The temperature of fresh jujube should be controlled at 1-0 and relative humidity during controlled atmosphere storage.

95 or more, oxygen is 3 -5, carbon dioxide.

Less than 2. Jujube fruits stored in controlled atmosphere should be treated with jujube preservatives before storage.

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.

<> Refrigerated storage: Seal the fresh dates in a plastic bag and store them in the refrigerator (about 4 temperatures).

Store in a cool and ventilated place: Put the fresh dates in a fresh-keeping bag or fresh-keeping box and store them in a cool and ventilated place.

Cold storage preservation: soak fresh dates in a solution of 2% calcium chloride for half an hour, pre-cool them at a temperature of 5-8 for 1-2 days, and then store them in a cold storage with a temperature of 0-4 and a relative humidity of 90%-95%.

Sand preservation: Spread 3cm thick sand at the bottom, then put dates, and then put the first in turn.

Two or three layers of dates and sand.

1. Refrigerated storage

1. After buying fresh jujubes, the first thing to do is to select the bad jujubes with bruises or black spots and insects on the surface. If it has been washed, it should be dried before storage.

2. Then seal the selected fresh dates with a plastic bag (fresh-keeping bag), preferably a small bag and a small bag separately, take as much as you eat, and leave a little air in the bag.

3. Put the plastic bag in the refrigerator and store it at a temperature of about 4, and tear open a small bag when you eat.

2. Store in a cool and ventilated place

1. Put the fresh jujube without insect eyes into a fresh-keeping bag or fresh-keeping box, and then store it in a cool and ventilated place.

2. The operation of the storage method in a cool and ventilated place is relatively simple and convenient, but the storage time will not be very long, and it can generally be stored for about 1 week.

3. Cold storage preservation

1. If the number of fresh dates is large, then a low-temperature and relatively closed environment is required, and a cold storage dedicated to preserving vegetables and fruits is a good choice.

2. First, soak the fresh jujube in a solution of 2% calcium chloride for half an hour, and then pre-cool it at a temperature of 5-8 for 1-2 days.

3. After pre-cooling, the fresh jujube can be stored in a cold storage with a temperature of 0-4 and a relative humidity of 90%-95%, which can be kept fresh for 2-3 months.

Fourth, sand preservation

1. Choose a cool and damp place, and spread a layer of wet sandy soil about 3cm thick at the bottom.

2. Put a layer of fresh jujube on top of the wet sandy soil, then put a layer of sand on the suffocating limbs, then put the second layer of jujubes, then put sand, and then put the third layer of jujubes.

3. The surface of the sand can be sprinkled with water to supplement the humidity, and this method can be stored for more than 3 months.