Potato germination sprouts when the ground temperature is not lower than 4°C, and sprouts can grow when the temperature is 5°C-7°C. Generally, the temperature of the processed potato pieces before sowing has reached about 6°C. If the sowing temperature is earlier than the temperature of the bud, the buds will stop growing after sowing; if the ground temperature after sowing can meet the growth needs of the young buds, the buds will stop growing at a sudden temperature, and the nutrition in the buds will continue to supply. , so the nutrition is stored so that the buds expand and grow into small pieces of potato, that is, dream raw potatoes. Its prevention measures include the following:
1. Covered with plastic film. The use of Mulch Film or double film covering cultivation can increase the temperature of the ground and prevent the occurrence of the dream potato, and can also mention the morning market.
2. Suitable sowing. According to the requirement that the temperature of 10 cm soil layer at the time of sowing stably passes 5°C, and the requirement of no frost damage after emergence, the open field potato in Hanzhong Basin is suitable for sowing in late February, and the plastic film potato is suitable for sowing in mid-January, and the double-film potato is Sowing in early December is appropriate.
3. Implement ridge work. Ridge cultivation can not only improve the ground temperature, but also improve the permeability of the soil.
4. Properly broadcast. In order to prevent the impact of the cold current on the potato, it can be properly sowed (12 to 15 cm in depth is appropriate) to prevent the occurrence of dream raw potatoes.
5. Cover farmyard fertilizers. After sowing of the buds, the farmyard fertilizers are first applied to the ditch to cover the buds, and then covered with soil.
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