In recent years, Daehong City has promoted the cultivation of red onion has the advantages of high yield and stability, high quality, wide adaptability, strong resistance, etc., generally a single diameter of 8 to 12 cm, the bulb is flat and round, the outer skin is dark red, Bright color, meat powder white, spicy and sweet, low early bolting rate, weight of about 350 grams per plant, more than 5000 kg per mu.
Cultivating strong seedlings in order to avoid excessive growth before winter, prematurely through the vernalization stage and early convulsions, generally from September 25 to October 5 when the temperature of 18 to 20 °C sowing. The ratio of the seedbed to the field is 1:8. The soil with loose soil and fertility and strong water retention capacity is selected as the seedbed, and the width of the rice plant is 2 meters wide, shallow ploughing and shallow flooding, and 45% of compound fertilizer per hectare is 50 kg. Seeds with 2 kg per acre seedlings, sowing depth of 2 cm. After sowing, 48% germinate EC 250 ml water and 25 kg spray per acre is used for soil sealing treatment, and then covered with wheat stubble or shade net to prevent rain erosion. After the sowing, keep the bed soil moist, and properly replenish the water as needed, and pay attention to the drainage. Seedlings have 2 true leaves when seedlings make up the fat, prevent pests and diseases.
Rationally cultivating onion requires a large amount of fertilizer and should be planted with loose and fertile soil rich in organic matter, deep topsoil, and strong water retention and fertility. The organic fertilizer applied per mu is 2000-3000 kg, superphosphate 100 kg, and potassium sulfate 50 kg. Make 2 meters wide and make sure the ditch is clear. In mid-November, about 45 days of seedling age, 4 to 6 leaves of seedlings were transplanted. Before transplanting, the fleas can be removed. For each mu, use 48% trifluralin EC 150 ml or 48% SD Lin EC 250 ml plus 50% acetochlor EC 150 ml water 25 kg spray. Use trifluralin to prevent soil photolysis in time. After the stamped plastic film can be planted. Planting spacing 20 to 25 cm, spacing 15 to 20 cm, 18,000 to 20,000 per acre, planting depth of 3 cm or so, compact practical, to prevent down seedlings and winter freeze injury. When planting, it is necessary to remove excessive seedlings of pseudo-stems and prevent premature convulsions.
After field planting, planting and replenishing water are timely according to the seedling condition and soil moisture. In the middle of March of the next year, the depth of urea is 50 kg per mu, and 45% of compound fertilizer is 75 kg for bulb expansion. During bulb expansion, the soil is kept moist. Good control of downy mildew, gray mold and aphid, whitefly control, applicable drugs such as zinc methacrylate, pyrimethanil, pymetrozine and so on.
Timely harvesting began when the onion leaves were yellow, pseudo-stems were thicker, and bulbs were harvested and marketed. If you need to store it, do not go to the stems, and then collect them in a cool, dry and ventilated place after harvesting. In order to prevent convulsions of onion during storage, 2500 mg/liter of qingxin solution may be sprayed when the onion leaves are not yet yellow.
Cultivating strong seedlings in order to avoid excessive growth before winter, prematurely through the vernalization stage and early convulsions, generally from September 25 to October 5 when the temperature of 18 to 20 °C sowing. The ratio of the seedbed to the field is 1:8. The soil with loose soil and fertility and strong water retention capacity is selected as the seedbed, and the width of the rice plant is 2 meters wide, shallow ploughing and shallow flooding, and 45% of compound fertilizer per hectare is 50 kg. Seeds with 2 kg per acre seedlings, sowing depth of 2 cm. After sowing, 48% germinate EC 250 ml water and 25 kg spray per acre is used for soil sealing treatment, and then covered with wheat stubble or shade net to prevent rain erosion. After the sowing, keep the bed soil moist, and properly replenish the water as needed, and pay attention to the drainage. Seedlings have 2 true leaves when seedlings make up the fat, prevent pests and diseases.
Rationally cultivating onion requires a large amount of fertilizer and should be planted with loose and fertile soil rich in organic matter, deep topsoil, and strong water retention and fertility. The organic fertilizer applied per mu is 2000-3000 kg, superphosphate 100 kg, and potassium sulfate 50 kg. Make 2 meters wide and make sure the ditch is clear. In mid-November, about 45 days of seedling age, 4 to 6 leaves of seedlings were transplanted. Before transplanting, the fleas can be removed. For each mu, use 48% trifluralin EC 150 ml or 48% SD Lin EC 250 ml plus 50% acetochlor EC 150 ml water 25 kg spray. Use trifluralin to prevent soil photolysis in time. After the stamped plastic film can be planted. Planting spacing 20 to 25 cm, spacing 15 to 20 cm, 18,000 to 20,000 per acre, planting depth of 3 cm or so, compact practical, to prevent down seedlings and winter freeze injury. When planting, it is necessary to remove excessive seedlings of pseudo-stems and prevent premature convulsions.
After field planting, planting and replenishing water are timely according to the seedling condition and soil moisture. In the middle of March of the next year, the depth of urea is 50 kg per mu, and 45% of compound fertilizer is 75 kg for bulb expansion. During bulb expansion, the soil is kept moist. Good control of downy mildew, gray mold and aphid, whitefly control, applicable drugs such as zinc methacrylate, pyrimethanil, pymetrozine and so on.
Timely harvesting began when the onion leaves were yellow, pseudo-stems were thicker, and bulbs were harvested and marketed. If you need to store it, do not go to the stems, and then collect them in a cool, dry and ventilated place after harvesting. In order to prevent convulsions of onion during storage, 2500 mg/liter of qingxin solution may be sprayed when the onion leaves are not yet yellow.
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