After many years of convulsions, spring potato seedlings are particularly concerned about the following two aspects because they have low temperatures, especially low night temperatures. They are vulnerable to chilling and rot when transporting, storing, and going to bed. They often cause serious losses.
1. Strictly choose to set the bed time: Do not set the bed too early, be sure to be after convulsions, and according to the weather forecast, select before and after noon on consecutive sunny days.
2, pay attention to all aspects of temperature control work: The first is to choose the leeward sunny place. The second is that long-distance transportation of seed potatoes must be windproof and heat-insulated, and can be covered with quilts, sacks, etc., and then wrapped with plastic film. The third is that the bed can be irrigated and warmed up two days before the seeding. Fourth, the selected sweet potato was soaked with 2% carbendazim solution for 20 minutes. Fifth, the seed potatoes that cannot be finished on that day must be kept in an environment above 10°C. Sixth, direct irrigation of well water, the amount of water should not be too large, to run through the bottom of the drainage ditch is appropriate, flood irrigation should not be flooded, if the seed bed in advance humidification can only be wet. Seventh, it is necessary to first water the soil and then cover the surface with sand. Eighth, it is covered with two layers of film during the day (film plus arched film) and covered with straw or other straw at night. Remove the mulch at the time of emergence and pay attention to soil moisture. When the seedlings are all out and the new leaves begin to unfold, they shall begin to ventilate the two seedbeds during the sunny hours from 10 am to 3 pm, and then gradually increase the ventilation area, when the seedlings grow to 12-15 cm. If the temperature is stable, ventilation can be done day and night. The 3-4 days before picking can be combined with irrigation to completely remove the grasshopper and the film, so that it stays up to date to adapt to the environment outside the field.
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