Storage technology of sweet potato

First, the construction of the potato pit pit site should generally choose the corner of the courtyard, and drill down a cellar hole with a depth of 3 to 5 meters, with a diameter of about 80 centimeters, and 2 storage rooms with a height of 1.7 meters, a width of 1.4 meters and a depth of 3 meters at the bottom. If it is an old cellar, you need to scrape off the empty soil on the surface of the cellar wall, and then spray fungicides to recommend potatoes.

Second, after Frosts Descent has passed the preparation and collection technology before entering the cellar, it is time to harvest sweet potatoes. You should choose sunny and windless weather for harvest, pay attention to digging, handling and light transportation, so as to prevent digging, bruising and breaking as far as possible. Put it back in the shade of the courtyard and dry the skin. If there are broken potato pieces should be put in the sun for 2 days, so that the wound becomes, hardened, to prevent bacterial infection. In case of rain, plastic sheeting should be used to protect against rain. It is best to use 800 times carbendazim or 1000 times methyl topiramate solution, fine spray, spray and dry, gently take the human cellar. Potato stacks should account for about 50% of the storeroom to maintain proper air flow and facilitate the discharge of carbon dioxide from the potato cubes. Separate good potatoes from injured ones. Potatoes with scars cannot be stored in a cellar to prevent bacterial infection. Frozen potato chips can't be in a cellar.

Third, the management work after entering the cellar (1) temperature management sweet potato begins to sprout above 15 ℃, and is easy to infect under high temperature; under 10 ℃, it is easy to be frozen, and the frozen pieces are easy to be infected and rotted by soft rot bacteria. Therefore, the suitable temperature for sweet potato storage is 10 ℃ ~ 15 ℃. The pit temperature and potato pile temperature can be measured with a thermometer, and the covering can be increased or decreased according to the temperature, and the pit temperature can also be adjusted by sealing the cellar for heat preservation or opening the pit to release heat. (2) after humidity management, the relative humidity in the pit is required to be stable at 80%-90%. If the relative humidity is too small, it is easy to cause water loss and shrinkage of tubers, and if the humidity is too high, the tubers are easy to rot, so we should pay attention to timely adjustment. When the humidity is too small, you should sprinkle clean cold water on the potato blocks. when the humidity is too high, it should be ventilated and deflated to reduce the humidity. Check the temperature, humidity and the status of the potato pile every 10 days. When you find rotten potatoes, pick them out in time.

IV. Children's note (1) prohibition of alcohol. Drinkers are not allowed to enter the cellar because the wine will accelerate the decay of the potatoes. (2) to prohibit the release of other fruits and sundries in order to prevent bacterial contamination.