5 techniques for growing potatoes in winter
1. Select high-quality varieties according to planting season, stubble and market demand. General plains, hills, and low mountains should choose early-maturing varieties such as Zhongshu No. 5, Huashu No. 1, Zaodabai, and Faurita, and high-altitude and two-alpine areas should choose E-potato 5 and 10, and E-potato 13. 14, Mila, Qingshu No. 9 and other late-maturing varieties.
2. The timely sowing date of potato winter season in plains, hills and low mountains should be from the end of December to the beginning of February of the following year (to avoid low-temperature freezing damage after emergence, try to postpone sowing as far as possible). Select sunny weather sowing. Early-maturing varieties are 5,500 per mu. Around the hole. The sowing date in high mountain areas is appropriately advanced or delayed according to the effects of snowfall. The seeding depth is 8 ~ 12 cm. It should be 15 cm deep for Feiruita and other varieties, so as to prevent the phenomenon of green skin when the seed is too shallow.
3. Applying the bottom fertilizer, the potato consumes the most potassium, followed by nitrogen, and the least phosphorus. The 3000 kg fresh potato yields 16 kg of nitrogen, 6.5 kg of phosphorus, and 32 kg of potassium. It is not easy to topdress the winter potato after covering it with plastic film. You must apply enough base fertilizer at one time. The rotten farmhouse fertilizer can be applied around 2000 kg per mu, and the general fertilizer is applied with 100 kg of special compound fertilizer (16:13:16 or 17: 6: 22). Urea 15 Kg, potassium sulfate 20 kg. Combined application of farm manure and urea for plowing and tidying, thoroughly mixing with the plow soil. Appropriate supplement of trace elements.
4. High ridge cultivation technology In areas suitable for mechanized operation, it is recommended to adopt the entire mechanized operation of cultivation, planting, tube, and harvesting. Plains, hills, low mountains and other areas can moderately develop double-membrane (arch shed + plastic mulch) or triple-membrane (large shed + small arch shed + plastic mulch) to cover potato planting, and advance the maturity period to mid-to-late April, grab high prices and gain high prices income.
5. Prevention and control of diseases, insect pests and weeds Adhere to the "prevention-oriented, comprehensive control" prevention and control strategy, focusing on the prevention and control of potato late blight. As a preventive agent, 70% mancozeb wettable powder can be used, and the dosage per acre is 175 ~ 225 grams. The therapeutic field should be selected for the diseased field. In the early stage of the disease, use 68.75% silver farrex (fluorobacillus · carbamycarb) 60 ~ 75 ml; or 76% glu (cream urea · manganese zinc) 100 g, etc. Spray prevention.
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