How can sweet potatoes be preserved without rotting? winter
In winter, people like to buy some sweet potatoes to eat at home, but if they are not stored well, they will rot and germinate. The following 360 Common Sense Network teaches you some tips for storing sweet potatoes. After the harvest of sweet potatoes in autumn, start storage. Sweet potatoes have high water content, tender tissue, thin skin and easy damage. They are susceptible to cold damage and infection and disease and rot. Pay special attention to rot when storing.
Sweet potatoes are what we call sweet potatoes. They are rich in nutritional value and are very beneficial to the body when eaten regularly. After the harvest of sweet potatoes in autumn, they are stored. Sweet potatoes have high water content, tender tissue, thin skin and easy damage. They are vulnerable to cold damage and infection and disease and rot. Special attention should be paid to rot when storing.
The reason for the rotten sweet potato cellar:
Chilling injury refers to the long-term low temperature of potato cubes below 9 ° C, and the metabolic activity is damaged. Generally, it is easy to produce chilling injury when the cellar temperature is 8 ° C to 9 ° C for 10 days, or the cellar temperature is 5 ° C to 6 ° C for 6 days, or the cellar temperature is 2 ° C to 3 ° C for 3 days; freezing injury, when the temperature drops to -1.3 ° C to 2 ° C, it is easy to produce freezing injury, and after being frozen or chilled, it is easy to cause pathogens to invade and cause a large number of rotten cellars; wet injury, the temperature at the beginning of storage is high, the potato body breathes vigorously, the water vapor in the potato pile rises, and when it is cold, it condenses into water droplets. Wet damage easily causes the potato body to rot and disease. The main diseases causing rotten cellars during storage include black spot, soft rot, dry rot and nematode
Comprehensive measures to prevent sweet potato rotten cellar:
The sweet potato harvest should be mastered when the average temperature in the local ten days drops to 14 ° C to 15 ° C. Generally, it is harvested around the beginning of winter in early November, and it is harvested on sunny days. During operation, attention should be paid to fine collection and fine transportation, and try to prevent digging injuries, scratches and bumps. Before entering the cellar, scrape off the old soil on the cellar wall and apply it with lime slurry. The bottom of the cellar is 15 cm thick. After removing the aged soil, sprinkle the upper layer of lime and use sulfur to smoke the cellar. Use 50 grams of sulfur per cubic meter. After igniting, close the cellar mouth and smoke for 1 to 2 days, and then open the ventilation hole. Spray 1% copper sulfate solution or 50 times formaldehyde solution in the cellar. It can also be mixed with formaldehyde and potassium permanganate and closed fumigation.
After sweet potatoes enter the cellar, do not seal the cellar too early, pay attention to ventilation and heat dissipation, prevent burning the cellar, and maintain a temperature of 15 ° C to 20 ° C and a relative humidity of 90%. After the winter solstice, cold waves are frequent and the temperature is low. Pay attention to heat preservation and cold protection, so that the temperature in the cellar should be kept at about 12 ° C to 13 ° C. After the Beginning of Spring, the weather is cold and hot, and the temperature is changeable. At this time, sweet potatoes begin to germinate, their resistance is weakened, and they are easy to rot. Therefore, when the weather warms up, they should be ventilated and cooled in time.
Storage method of sweet potatoes
1. The well cellar stores sweet potatoes:
Select a place with high terrain, solid soil, and low groundwater level, and dig a wellbore down, generally about 1 meter in diameter and 5 to 6 meters in depth. The size of the storage room can be determined according to the amount of storage. The storage room should be padded with 10 to 15 cm thick dry sand, on which sweet potatoes should be placed. Sweet potatoes can only be filled 70% to leave a place for ventilation, otherwise they will rot due to moisture and heat.
2. The shed stores sweet potatoes:
Generally dig a cellar about 2 meters wide, 3 to 4 meters long, and about 2 meters deep. The sweet potatoes should be piled up one by one from the bottom up to avoid direct contact with the cellar wall.
3. The house cellar stores sweet potatoes:
The structure of the cellar is similar to that of a common house, but the walls and roof are very thick, sealed around, the windows are open, and there are fire channels for heating, which can be used for high temperature callus treatment. There are two types of cellars: large cellars (storage 10,000~ 50,000 kg) and small cellars. The cellar body of the cellar is small, saving labor and materials, and is suitable for farmers to store. Generally, each cellar can store 1500~ 3000 kg.
4. Indoor storage method for storing sweet potatoes:
Sweet potatoes are afraid of cold. When the temperature is too low, they will be frozen and form a hard heart. They are not cooked or boiled. If the temperature is too high, they will germinate again. It is best to control the room temperature at about 15 ° C. Sweet potatoes are damp, which can easily cause germs to attack and cause rot. It is best to store them in a breathable wooden box. If there is no wooden box, wooden boards should be placed in the place where the sweet potatoes are stacked and against the wall, and some things should be covered on the potato pile to prevent moisture. During the warm day, it is necessary to properly open the window for ventilation to keep the indoor air fresh and prevent cold air from blowing in. It is best to put sweet potatoes bought from the market in the sun for a few hours to reduce the moisture of the wound and promote healing. When taking them, handle them with care to avoid bumps.
5. Sliced sun-dried preservation method to preserve sweet potatoes:
Slice the sweet potatoes and put them on the room or in a sunny, dry and ventilated place to dry. Be careful not to be exposed to rain and snow. After drying, store them in a dry place indoors, and soak them in water before eating.
