Winter storage of sweet potato

Now that the sweet potato has been stored for the winter season, in order for the sweet potato to safely pass through the winter, no rotting occurs. The following tasks should be done:

1, first cleaned the old cellar, and then disinfected, per cubic meter of space with antibacterial agent 401 or 402, 30-40 ml fumigation, can also be seen 5 grams of sulfur burning in the basin, closed for two days, and then open the ventilation , Formaldehyde (formalin) can also be used 50 times, sprayed around the cellar wall, closed for two days, and then open the use.

2, timely harvest to prevent potato block frozen, to grasp the local average temperature dropped to about 14-15 °C is appropriate.

3, select the seed potatoes, in the harvest and transportation, storage process should be gently to prevent wounds caused by the disease, pick the potato block.

4, to strengthen the storage management, mainly to master the pit temperature, humidity and ventilation. In general, management pays attention to changes in three periods.

High-temperature period: just entered the cellar potato block, the respiration is very strong, large heat dissipation, water vapor is also large, but the outside temperature is relatively high, the most likely to cause high temperature and humidity in the pit, is conducive to disease, causing rotten pit. Therefore, about half a month into the cellar, it is necessary to ventilate and ventilate frequently, reduce the temperature and humidity in the cellar, and prevent the onset of the disease.

Low-temperature period: During the period from December to February, the respiration of the potato block gradually decreased, and the cold air in the north gradually increased. Regardless of the ground temperature and the temperature at the low temperature stage, the insulation work should be well done, and the cellar should be closed. Cover the grass, keep the cellar temperature at 11-13°C, and the relative humidity 75-80% to prevent it from being frozen and safe for winter.

Temperature change period: In late February to the open pit nursery, the temperature began to rise during this period, the respiration of the potato block gradually strengthened, and the oxygen in the pit was often insufficient. Therefore, special attention must be paid to ventilation. Every few days, open the cellar door or ventilate the room for ventilation in sunny and warm weather.

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Specifications

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