Grapes are also rich in vitamins (A, B1, B2, B6, PP, C, etc.), minerals and trace elements.
Glucose and fructose contained in grapes are easily absorbed by the body and rapidly metabolized.
Grapes are considered a remedy due to their valuable composition. This type of treatment is called ampelotherapy.
Storage of grapes began to become widespread in the late XIX and early XX centuries. Currently, the following methods of storage of grapes are available: in the bush, dry and green comb, using various packaging materials, frozen, paraffin, using antiseptics and gamma rays, storage in refrigerators and in a regulated gas environment.
Azerbaijani peasants have always paid special attention to the preservation of grape products. Various folk methods have been used to store grapes until spring.
The most common of these is the bandage method. Wooden twigs with hooks are attached to a wooden curtain 2-3 m long. For the bandage should be peeled bunches of corn (1.5–2 knots). Sometimes the cut bunch is kept on the bush for one day and harvested the second day. This reduces friction and makes cleaning much easier. Then the bunches of grapes are hung from the bottom of the band. Hanging clusters should be 30-40 cm above the floor. Clusters should be hung side by side on the bandage. It is possible to collect up to 50-100 kg of grapes in one bandage. According to another popular practice, a bunch of grapes is cut from the stalk with a sharp knife, and a bunch of grapes is transferred to the end of the stalk, ie the broken part of the stick.
Then the bunches of grapes are spread on a reed floor and once a week the bunches are turned and cleaned of damaged pods.
Another method of storing grapes is to spread the bunch on the ground in the basement and cover it with soft soil or bury the bunch of grapes in the ground.
In most viticultural regions, clusters are removed from the attic of residential buildings, basement ceilings, balconies, etc. by various means. they hang from places.
Length 1-2 m. suspensions weighing 2-10 kg come in different sizes. However, grapes stored in this way quickly lose their freshness and shrink. Due to the lack of moisture, grapes, which are sometimes stored, turn into raisins. Grapes are also stored on shelves, trays, boxes and other means. The containers contain wood chips, birch bark, seaweed, sand, etc. spilled. Grapes stored in this way are less wilted than in the hanging method, but the decay increases.
Another method is to bend a bunch of grapes into their own leaves and bury them in the ground.
In addition, the clusters on the vine are put in a bag. Sometimes the clusters on the long stalks are put in a bag, the stalks are brought into the room and kept all winter. This is called the "milak" method.
Alternatively, 8-10 bunches of willow or twig pens are hung and stored in the attic, attic or warehouse until a small sprinkling. In this way, it is possible to keep the Tabrizi variety for 6-7 months.
Tabrizi grape variety can be stored on the vine for 2-3 months after ripening.
Another progressive method is the method developed in France. This method is still used in Italy, Bulgaria, the southern regions of Russia and Ukraine. This method ensures the viability of the cluster without the application of cooling and allows it to be stored until April-May. Unlike keeping in a dry comb, the loss in this method is also less our.
In another method, the bunch is cut with a fork, placed in a bowl of water and a spoonful of charcoal is added to prevent it from smelling. Containers with water are placed in a sloping position on special trays.
The mouth of the pot is covered with cotton to reduce evaporation. Some varieties even form roots in water and do not lose cluster mass. By the time of realization, the turgor of the gills does not disappear.
Melted paraffin is also used to preserve a small amount of grapes. In this method, the bunch is dipped in melted paraffin. Before use, the paraffin cluster is placed in warm water with a temperature of 60-650 C. Paraffin melts and separates from the cluster. Then rinse with cold water. Paraffin significantly prolongs the shelf life of grapes.
In addition, it is known that in Ganja, Ordubad, Absheron grapes are stored in kahriz. The advantage of this method is the absence of additional costs, the loss of freshness, taste and quality of the product.
Thus, the traditions of conservation in different parts of Azerbaijan confirm that viticulture plays an important role in the lives of Azerbaijanis.