Question 2: Long-term storage method of peaches (1) The suitable storage temperature is -0.5℃-0℃ and the relative humidity is 90%. If it is to be preserved for a long time, the temperature of the cold storage must be strictly controlled, and the temperature of the cold storage cannot fluctuate. If it is lower than-1℃, it may be frozen. Peaches can be properly ventilated at the initial stage of storage. At low temperature, symptoms of chilling injury will appear after 2 weeks. When it is moved to a high temperature environment for ripening, the pulp will become dry, fluffy and soft, and the pulp around the stone will appear obvious brown. In severe cases, patterns can be seen on the skin, the skin color is dull and the flavor will change. Peaches stored at 2℃-5℃ are more prone to pulp deterioration than those stored below 0℃. The varieties with good storability can be stored for 4 weeks under the stable condition of -0.5℃-0℃, and the quality is good. Peaches will become tasteless if they are refrigerated for too long, so their storage period should not be too long.
(2) Peaches stored in modified atmosphere can be stored for 6 weeks under the conditions of 0℃, 85%-90% relative humidity, 5% carbon dioxide volume fraction and less than 1% oxygen volume fraction, which is 1 times longer than peaches stored in air. If bricks or zeolite soaked in potassium permanganate are added to the modified atmosphere bag to absorb ethylene, the effect will be better. It is reported that spontaneous modified atmosphere storage with fresh-keeping bags and CT series modified atmosphere preservatives can be stored for 2 months at 0℃-2℃ and at least 8 days at 25℃-30℃-10 day.
(3) Chemical storage and preservation methods During the storage of peaches, a large number of peaches often rot due to brown rot. Before peach storage, the peach can be prevented from rotting by soaking in benomyl suspension with mass fraction of 0. 1% at 40℃ for 25 min.
(4) Ice room storage and fresh-keeping methods When there is no mechanical cold storage in the northern region, winter peaches and other more storable varieties can be stored in the ice room. In areas where there is no natural ice source, artificial ice can be made in cold seasons. The specific method is to cut the ice cubes into large ice cubes with a thickness of 30 cm -40 cm, a length and a width of about 1 m, and put them in the cellar. Spread a straw with a thickness of 40 cm -50 cm at the bottom of the cellar to prevent water accumulation after freezing, and then seal the cellar door to store ice cubes. When the peaches are ripe, the ice in the cellar is removed, and a layer of 40 cm thick ice is piled at the bottom and around the cellar. Peaches packed in boxes or baskets are piled on ice, and the packages are filled with crushed ice. After each layer, put another layer of ice on it. After stacking, cover the top floor with sawdust or straw with a thickness of about 1 m, and the cellar door must be tightly sealed, so as to shorten the working time as much as possible when it is necessary to enter the cellar for inspection. The temperature of wine cellar should be kept at 0℃-65438 0℃. Once the ice melts and the temperature rises, the peaches should be taken out of the cellar immediately.
(5) Preservation in the refrigerator: after the precooled peaches are dried, they are packed in plastic bags and stored in the refrigerator. The temperature is controlled at 0℃, the relative humidity is controlled at 85%-90%, and the storage period can reach 1 month.
Question 3: How can peaches be preserved for a long time? Fresh peaches are breathing fruits, which must be combined with external assistance, such as cold storage and nitrogen washing to shield oxygen.
Question 4: Can peaches be kept in the refrigerator? Peaches generally ripen in May, but of course some varieties ripen around August. Judging from the ripening time, we can also generally think that peaches are mainly stored at long temperature and should not be stored in the refrigerator.
Question 5: Where can peaches be stored for a long time? First of all, you can't wash it! Generally speaking, the storage time of peaches should not exceed 2 weeks, but this method can extend the storage time to 2 1 day, and peaches are harder than untreated samples.
Peaches are soft and juicy. When they are mature, their skin is thin and tender, and they are not resistant to storage. Comprehensive measures should be taken to keep fresh after picking.
The suitable refrigeration temperature is -0.5℃-0℃ and the relative humidity is 90%. If it is to be preserved for a long time, the temperature of the cold storage must be strictly controlled, and the temperature of the cold storage cannot fluctuate. If it is lower than-1℃, it may be frozen. Peaches can be properly ventilated at the initial stage of storage. At low temperature, symptoms of chilling injury will appear after 2 weeks. When it is moved to a high temperature environment for ripening, the pulp will become dry, fluffy and soft, and the pulp around the stone will appear obvious brown. In severe cases, patterns can be seen on the skin, the skin color is dull and the flavor will change. Peaches stored at 2℃-5℃ are more prone to pulp deterioration than those stored below 0℃. The varieties with good storability can be stored for 4 weeks under the stable condition of -0.5℃-0℃, and the quality is good. Peaches will become tasteless if they are refrigerated for too long, so their storage period should not be too long.
Peach stored in modified atmosphere at 0℃, relative humidity 85%-90%, carbon dioxide volume fraction 5% and oxygen volume fraction 1% can be stored for 6 weeks, which is longer than peach stored in air 1 times. If bricks or zeolite soaked in potassium permanganate are added to the modified atmosphere bag to absorb ethylene, the effect will be better. It is reported that spontaneous modified atmosphere storage with fresh-keeping bags and CT series modified atmosphere preservatives can be stored for 2 months at 0℃-2℃ and at least 8 days at 25℃-30℃-10 day.
Refrigerator storage and preservation The precooled peaches are dried, packed in plastic bags and stored in the refrigerator. The temperature is controlled at 0℃, the relative humidity is controlled at 85%-90%, and the storage period can reach 1 month.
So everyone can eat peaches at any time. ....
Question 6: What kind of peach trees can keep fresh for a long time? Peaches are breathing fruits, which must be combined with external assistance, such as cold storage and nitrogen washing to block oxygen.
Question 7: How long can flat peaches be kept? How to store energy for a long time: it is usually eaten in 3 to 4 days. Refrigeration at about 0 degrees can only keep fresh for 2 to 3 days (that's what my family does). Because the oxygen in the air will make the flat peaches oxidize and deteriorate, let's see if we can use the kind of fresh-keeping bag with a sealed mouth, that is, the kind with a sealing strip at the opening, which can be sealed by pressing (you can buy that kind of sealed bag at the dried fruit stand, but it is a little small, and it can hold 4~5 at most). Don't seal the flat peach directly after putting it in, but put the bag in the basin (be careful not to put it in the sealed mouth) because of the water pressure. After putting it in the travel bag, refrigerate it with frozen hard frozen mineral water (preferably put it in the bottom layer or in the pocket on the side of the travel bag). Note 1. Replace frozen water in time. 2. Don't let the shape of the flat peach be squeezed to cause flesh injury (so the flat peach will rot easily, as long as one of them rots, the rest will rot). 3. Don't choose too ripe flat peaches, which will easily lead to extrusion deterioration.
You can test whether this works first. If this method still doesn't work, don't bring flat peaches.
Question 8: Why do peaches rot easily? How can I keep peaches longer? Peaches are delicious, not easy to keep fresh, and easy to rot, because peaches are soft and juicy, with thin skin and tender flesh when ripe, and are not resistant to storage. Here are some ways to keep fresh.
Due to the characteristics of peaches, the suitable cold storage temperature is -0.5℃-0℃ and the relative humidity is 90%. If it is to be stored for a long time, the temperature of refrigeration must be strictly controlled, and it may freeze below-1℃. Peaches stored at 2℃-5℃ are more prone to pulp deterioration than those stored below 0℃. Peaches will become tasteless if they are refrigerated for too long, so their storage period should not be too long.
Peaches stored in modified atmosphere can be stored for 6 weeks under the conditions of 0℃, 85%-90% relative humidity, 5% carbon dioxide volume fraction and 1% oxygen volume fraction, which is 1 times longer than peaches stored in air. If bricks or zeolite soaked in potassium permanganate are added to the modified atmosphere bag to absorb ethylene, the effect will be better.
Refrigerator storage and preservation method The precooled peaches are dried, put into plastic bags and stored in the refrigerator. The temperature is controlled at 0℃ and the relative humidity is controlled at 85%-90%. The storage period can reach 1 month.
According to different varieties, storage measures are different. Generally, late-maturing varieties such as Xue Tao and Tao Dong are more resistant to storage, followed by middle-maturing varieties such as Okubo and Baifeng, and early-maturing varieties such as peach and Meixian are the least resistant to storage. Therefore, peaches should be precooled as much as possible after purchase, and then controlled at about 90% as much as possible by sprinkling water and adjusting air humidity. When long-term storage is needed, the temperature should be controlled to reduce the occurrence of chilling injury. Peaches should be moved to a room with a higher temperature and cooked before eating. The time required for peach ripening depends on the temperature, which is generally 18℃-29℃, and should not be too high or too low. When the temperature is 20℃-25℃, it takes 3 -4 days to complete ripening; It takes about 8 days to reach 16℃; At 10℃, it takes 15 -20 days. Peaches need to ripen quickly, and the faster they ripen, the better the quality of peaches.
Question 9: How long can fresh peaches be kept in cold storage? Peaches have poor storage resistance and are not easy to store at room temperature. It can only be stored under cold storage conditions.
1. Variety selection: Peach is not resistant to storage, and Yuru peach has the worst storage resistance. Insoluble peaches of late-maturing varieties, such as Feicheng Peach and Shaanxi Tao Dong, are more resistant to storage. Late maturing and hard meat varieties should be selected for storage.
2. Harvest and packaging: When the peach is full, its color, fragrance and taste begin to appear, but the meat quality is still firm, which is more suitable for harvest and storage when it is close to maturity. Early harvest, small fruit, poor quality and poor commodity value of stored fruit; Harvest too late, the fruit quality is good, but the texture becomes soft, which is easy to cause mechanical damage and difficult to store and transport.
3. Peach can't be aged during storage, and it is in danger of chilling injury at-1℃. The suitable storage temperature is-0.5 ~ 65438 0℃ and the relative humidity is 85 ~ 90%.
Under such low temperature conditions, the storage period of peaches is 14-56 days. It is reported that the peach softens sharply at room temperature after harvest, but when it is moved to 0℃, the softening stops and the hardness increases, that is, it hardens, and the hardening is the most obvious at 0℃.
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