First, the conditions for sweet potato storage requirements The suitable temperature for sweet potato storage is 10-15 °C, and 11-13 °C is suitable for the middle and late period. In January, due to the low temperature, sweet potato is vulnerable to cold damage. The frozen sweet potato will rot on the surface of the potato pile or the hole in February, and the heavy one will rot. The relative humidity of the air in the crucible should be kept at 85%-90%. If the humidity is too small, the potato tubing will lose more water, and there will be shrinkage and dry tail phenomenon. If the humidity is too large, condensed water will be generated, and the potato tubing will be wetted. Sweet potatoes continue to breathe uninterrupted during storage. As the concentration of carbon dioxide increases, the supply of oxygen is insufficient and the breathing gradually weakens. Severe oxygen can cause hypoxic breathing, causing self-poisoning. Therefore, properly ventilate during storage. Second, the storage technology in the middle and late stages of storage From the 20th day after the entry to the beginning of the next year, it is the middle of storage. At this stage, the potato tubers breathe slowly, and the temperature gradually decreases. In addition, the winter season is entered, and the heat preservation is the management focus. The temperature can be controlled at 12-13 ° C, and the minimum is not less than 10 ° C. Insulation measures can be used to close doors and windows, air eyes, dome cover soil or hoe grass, hang grass shovel at the hole, cover the grass on the potato pile, smash the grass wall outside the wall, and set up wind barriers next to the raft. When the temperature is below 9 °C during the severe winter season, use a chimney stove to make a fire or take other warming measures. After the beginning of spring, the temperature gradually rose, but the weather was warm and changeable. After long-term storage, sweet potato has reduced respiratory capacity and is more sensitive to adverse environmental effects. The management of sweet potato in the late storage period must not be negligent. If the storage volume is large and the temperature is too large, the air eye should be opened in the warm and sunny weather at noon, ventilation and moisture, and pay attention to close in time; if the sputum is too dry, spray appropriate amount of warm water to increase the humidity inside the sputum.
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