Plastic film onion colonization points
Fertilizing and making onion is a kind of vegetable crop of hi and big fertilizer. The lack of any element of nitrogen, phosphorus and potash will lead to the reduction of production. In order to achieve high yield and high quality, it is necessary to do scientific fertilization and enough base fertilizer. Generally, the total content of Mushi is over 45% of low-nitrogen, high-phosphorus, and high-potassium-sulphur compound fertilizers, 50 kg, 5,000 kg of decomposed farmyard manure or 500 kg of dried chicken manure. After spreading the fertilizer, plowing and soil tillage After making a fine 100-120 cm wide cymbals.
The selection of young seedlings before transplanting requires that the age of onion be suitable for 50-55 days. At this time, the seedlings are easy to take root, and they will grow rapidly after transplanting. The diameter of the seedlings will be 5-6 mm and the seedling height will be 25 cm. 10-15 days before transplanting, spraying potassium dihydrogen phosphate foliar fertilizer on seedlings can promote early rooting of seedlings after colonization.
The cultivation of film-covered mulching film can enhance the ability of onion to resist cold in winter, increase the ability of soil to retain water and fertilizer, and greatly increase the yield of onion. Before filling the film, water should be poured to make it full. After the water in the bowl is completely infiltrated, when the soil is wet, 33% of the weeds will be sprayed in 100 ml per acre, evenly sprayed on the surface, and then covered. Prepare the mulching film and the coating tool. When the work is done, select the clear weather with no wind, and press the two sides of the film firmly with the earth, otherwise the mulch film will be damaged due to the wind and the field work will not be convenient.
Transplanting colonization of onions is generally in early November, and the mulch is covered 5 days before transplanting to increase the temperature. Before the transplanting, holes were punched on the mulch with a spacing of 20 cm and a spacing of 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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