How to prevent potatoes from producing dream potatoes

Affected by the low temperature after the potato sprouts, the small potatoes formed by the expansion of the buds are called Mengsheng potato, commonly known as "holding eggs". In production, this phenomenon is mistaken by farmers as the performance of excellent, early-maturing and high-yield potato varieties. In fact, Mengsheng potato no longer sprouts. Generally, the shortage of seedlings is about 10%, which seriously affects the yield and benefit.

I. the cause of occurrence

Potato can only germinate when the soil temperature is not lower than 4 ℃, and sprout can only grow when the soil temperature is 5-7 ℃. Generally, the temperature of potato pieces treated before sowing has reached about 6 ℃. If the ground temperature of sowing early is lower than that of bud block, the bud will stop growing after sowing; if the ground temperature can meet the needs of bud growth after sowing, but the bud will stop growing due to a sudden low temperature, and the nutrition in the bud block will continue to be supplied, so the nutrition is stored to make the bud expand and grow into a small potato block, that is, Mengsheng potato.

II. Preventive measures

1. Covered with plastic film. The cultivation with plastic film mulching or double plastic film mulching can not only increase the ground temperature, prevent the occurrence of dream potato, but also go on the market earlier.

two。 Sow seeds at the right time. According to the requirement that the temperature of 10 cm soil layer stably passes through 5 ℃ during sowing and does not suffer frost damage after emergence, it is suitable for open field potato in Hanzhong basin to sow in late February, plastic film potato in the middle of January and double film potato in early December.

3. Ridge farming is carried out. Ridge cropping can not only increase the soil temperature, but also improve the soil permeability.

4. Sow it properly. In order to prevent the impact of cold snap on potatoes, you can sow them deeply (12-15 cm deep) to prevent the occurrence of Mengsheng potatoes.

5. Cover farm manure. After the bud block was sown, the farm manure was first concentrated on the ridge and furrow to cover the bud block, and then covered with soil.