Potato autumn seed retention technology
1. The fine soil preparation autumn potato should choose the land with high topography, convenient drainage and irrigation, and fertile soil. 2. Germination of Seed Potatoes In mid-August, the harvested spring potatoes were picked to pick up diseased potatoes, cracked potatoes, and irregular potatoes. Each piece of seed potato was cut into 4-6 pieces, and 0.1 g of gibberellin was used to mix 100 kilograms of water. The potato pieces were soaked for 10-20 minutes. After they were taken out and allowed to dry, they were pretreated by lamination with wet sand. Generally do not spray water during germination, germination temperature is maintained above 30 °C. Under low temperature, aeration, and moist conditions, when the shoot length is about 3 cm in 6-8 days, the potato pieces are removed from the sand, and the seedlings are allowed to stand for 1 day under the shade of the trees for hardening. 3. Potatoes planted in appropriate period and sufficient base fertilizer for fall seeding should be kept away from sowing in the hot season to ensure the successful emergence of the potato and avoid the high temperature season during the period of potato so as to reduce the degradation of the seed potato and maintain seed quality. Sowing when the temperature drops in late August. When sowing, 3000 kg of high-quality farmyard fertilizer, 15 kg of urea, and 20 kg of potassium sulfate are applied to the sowing ditch every 667 square meters, and then seed potatoes are planted. 4. Appropriate density planting of autumn sowing potato should increase the density more than that of spring sowing potato. When sowing, the spacing is 50 centimeters and the spacing is 20 centimeters. Shallow kerf is used. The seed amount is about 120 kilograms per 667 square meters and 7000 seeds are planted. After planting, the cover soil is 10 cm thick, forming a natural ridge. 5. Field Management In early September, seedlings should be enhanced with water and fertilizer management to ensure that the potato seedlings have sufficient fertilizer and water. Autumn sowing potato seedling temperature is higher, pay attention to drought relief. Watering in case of drought, keeping the surface moist and ridges dry, so that the potato seedlings grow quickly and long enough to form enough photosynthetic area to promote the formation of tubers. After each watering, soil should be soiled according to the situation. Potatoes usually grow soil 2-3 times. 6. Prevention of Diseases and Insect Pests Potatoes in late autumn are prone to late blight and autumn aphids. Found late blight strains should be unplugged in time and brought out of the field burned. Can be used 65% mancozeb 100 grams per 667 square meters or 40% aluminum alfa 150 grams, 30 kg of water evenly spray control, spray once every 7-10 days, and even spray 2-3 times. Available 40% omethoate 100 grams per 667 square meters or 25% carbendazim 50 grams, 50 kg of water evenly spray control aphids. 7. Timely harvest At the end of October, when the potato has grown 60 days after emergence, the lower middle leaves of the plants begin to yellow, and they can be harvested.
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