Five high-yield techniques for potato planting in winter

1. Choose high-quality varieties

According to the planting season, stubble area and market demand, select the right varieties. In general plains, hills, and low-mountain areas, early maturing varieties such as Zhongshu No. 5, Huashu No. 1, Zaodabai, and Favorita should be selected. In high mountain and second mountain areas, E Ma Ling Shu No. 5 and 10, and E Ma potato No. 13, 14, Mila, Qingshu No. 9 and other mid- and late-maturing varieties.

Second, timely sowing

In plains, hills, and low mountain areas, the winter potato planting period should be from the end of December to early February of the following year (to avoid low temperature after emergence, postpone the planting as much as possible), choose sunny weather for planting, early-maturing varieties are about 5500 holes per mu. The sowing date in high mountain areas is appropriately advanced or delayed according to the impact of snowfall. The planting depth is 8-12 cm, and the Favorita and other varieties should be planted 15 cm deep to prevent the phenomenon of green skin when the seeding is too shallow.

3. Apply foot fertilizer

Potatoes consume the most potassium fertilizer, followed by nitrogen, and phosphorus is the least. Fresh potatoes with a yield of 3000 kilograms per mu need to absorb 16 kilograms of nitrogen, 6.5 kilograms of phosphorus, and 32 kilograms of potassium. It is not easy to topdress the winter potato after covering with plastic film. It is necessary to apply the foot fertilizer at one time. The decomposed farm manure can be applied about 2000 kg per mu, and the chemical fertilizer is generally 100 kg of special compound fertilizer (16:13:16 or 17:6:22), urea 15 Kg, 20 kg of potassium sulfate. Farmyard manure and urea are applied in combination with tillage and soil preparation, and fully mixed with the plough layer soil. Appropriate supplement of trace elements.

4. High-ridge cultivation technology In areas suitable for mechanized operations, it is recommended to adopt mechanized operations throughout the entire process of tilling, planting, managing and harvesting. Plains, hills, low mountains and other areas can be moderately developed double-film (arch shed + mulch) or triple-film (large arch shed + small arch shed + mulch) to cover the planting of potatoes, and advance the maturity period to mid-to-late April to grab high prices. income.

5. Prevention and control of diseases, pests and weeds

Adhere to the prevention and control strategy of "prevention first, comprehensive prevention", focusing on the prevention and control of potato late blight. The preventive agent can be 70% mancozeb wettable powder, with a dosage of 175 to 225 grams per mu. For the diseased fields, use the most effective agent, and use 68.75% silver faride (fluobacterium·propamocarb) 60～75ml; or 76% glu (cymoxanil·manganese) as early as possible. Zinc) 100 grams of spray control.

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