Plastic film covering spring potato has the effect of warming and moisturizing, neat emergence, early enlargement, and increase production and income, especially for the early harvest of potato in the area below 400 meters above sea level. The technical points are: Site preparation requires soil looseness and fertility, early plowing, and fine soil preparation. It is advisable to use wide ridge double-row mulching to cover ridge width 0.7-0.8 meters and ridge height 0.15-0.22 meters. The selected varieties were selected as early-ripening, high-yield, and good-quality virus-free seed potatoes, yamzao 1, zhongshu 3, chuanxiong 4, and ferurich. Use healthy seed potatoes without insect damage, no spots, no damage, and no malformation. About 150 kilograms are used for the mu. Large potatoes can be cut and sowed. Each seed potato weighs about 30 grams and buds 1-2. Timely early sowing in general areas below 400 meters above sea level in the middle and late December, that is, the average daily temperature of 5 degrees before the planting, the density of 4000-5000 nests / acre, after sowing cover film, the four sides of the film embedded in the trench with fine soil pressure Yan . Replanting basal fertiliser by applying phosphorus and potash fertilizer to open ditch before sowing, once enough basal fertilization, generally apply 2500-4000 kg high-quality farmyard fertilizer per acre, 25-30 kg superphosphate, 100-150 kg plant ash (also available 20-25 Potassium sulphate instead of potassium), 45% compound fertilizer 50-75 kg + decomposed farmyard fertilizer 1500-2000 kg. For weeding and severely damaged grassland, chemical weeding should be carried out before cover filming after re-cultivation, so as to prevent weeding. Can use 50% acetochlor 75-100 ml whole field spray, the application requires soil moisture, flat surface, in order to improve the weeding effect. When the film is covered, the land is required to be moist, the mud surface is flat, and the plastic film is flat on the ridge surface. The film edge is pressed with wet soil to increase the warming effect and prevent the wind from blowing the film. Breaking the membrane when the potato sprouts emerged and the top film of the shoots was timely broken on the membrane to induce the seedlings out of the membrane. The membrane could not be broken too late to prevent the high temperature from burning seedlings. The membrane hole should not be too large, otherwise it would affect the insulation effect and cause miscellaneous Grass breeds. If the final frost is over at this time, use fine soil to seal the seedlings. Field management When the seedling height is 20-25 cm, timely application of 100 kg of monopotassium phosphate and 50 kg of water per acre for foliar dressing can increase plant resistance, reduce disease, early maturation and increase yield. When the central disease of the late blight occurs in the field, it should be sprayed and sprayed with 600% Kelu 600 times as soon as possible. Controlling aphids can be controlled by spraying 1000 times 10% imidacloprid. Timely harvested mulching can be cultivated in the morning for about 10 days. Harvested on a sunny day to ensure that the appearance of the potato block is smooth, increase commodity quality, grab a gap in market sales, and increase economic efficiency.
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Plastic film covering potato cultivation
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