Onions are a type of high-yield and high-efficiency vegetable crops grown in vegetable production areas. Such vegetables have the characteristics of small investment, simple field management, high yield, and good efficiency. At the same time, it can also be interplanted with peanuts and other economic crops. It is a good crop for farmers to adjust planting structure, increase the index of multiple cropping, and increase income. After the autumn harvest, it was the best time for planting film onions. Now, we will introduce the technical points for the cultivation of plastic film onions in autumn.
First, fertilization to do wolfberry onion is a kind of vegetable crop of hi-fertilizer. The lack of any element in nitrogen, phosphorus, and potassium fertilizer will lead to a reduction in production. In order to achieve high yield and quality, scientific fertilization must be applied and basic fertilizer must be applied. In general, mu is applied to diammonium 30 kg, potassium sulfate 15 kg, and 5000 kg of mature farmyard fertilizer, and then 1 kg of zinc fertilizer is applied. After spreading the fertilizer, it is plowed and the soil is ploughed to make it 100-120 cm wide. plot.
Second, select the age seedlings before transplanting requirements onion seedlings age 50-55 days, because at this time seedlings easy to root, after transplanting to restore fast growth, seedling diameter of 6-8 mm, seedling height 25 cm, single seedlings Weigh about 4-6 grams. Before 10-15 days of transplanting, spraying potassium dihydrogen phosphate foliar fertilizer on the seedbed can promote the early rooting of the seedlings after colonization.
Third, film-covered plastic film can increase the ability of onion to resist cold in winter, increase soil water retention and fertility, and greatly increase onion production. Before the film is covered, it must be irrigated with water to make it wet. After the water in the bowl is completely infiltrated, spray 33% of the weeds through the soil when the soil is wet. Apply 100 ml per acre, evenly spray on the surface of the bowl, and then cover the film. Prepare a plastic film. The tools include large iron pots, shovels and other materials used for laundry, and farm implements. Three people are required for the operation. First the plastic film is laid flat on the surface of the bowl, covering the side first. At the same time. The person in front of it tightens the membrane to keep it close to the edge of the heel. In the middle, one person controls the iron basin and makes it upright, so that the edge of the iron basin presses the mulch into the soil in the rolling process. During the rolling process, slight pressure is applied and the force is uniform. Not too fast, the last person will use iron shovels or feet to flatten the rolling mulching film. In the case of mulch film, windless weather should be selected, otherwise the mulch film will be damaged due to the wind, and it will not be convenient for field operations.
Fourth, transplanting planting vegetable production areas in central Hebei Province, onion transplanting time is usually in early November, five days before transplanting covered with plastic film to increase in temperature. Before the transplanting, holes were punched in the mulch, and the spacing was maintained at 20 cm and the spacing between the plants was 15 cm. After transplanting, they should be transplanted immediately. When transplanting, roots should not be exposed on the surface, but they should not be too deep. Planting depth should be 2-3 cm.
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