Shallots are rich in aromas and rich in nutrients that stimulate appetite. The demand for chives has become more and more robust in the market, so the cultivation area is growing. In order to increase the production of chives, the following technical links should be grasped.
Suitable sowing
Scallions like cool climate, cold resistance and heat resistance are strong. Chives can germinate at the temperature of 4-5°C. The optimum germination temperature is 13-20°C. The suitable temperature for growth is 10-25°C, and the optimum temperature is 15-20°C. The suitable temperature for the growth of stems and leaves is 18-23°C, the suitable temperature for root growth is 14-18°C, and the growth rate is slow at temperatures above 28°C. The open field is planted in spring and autumn; the protected area can be planted throughout the year except summer; shade nets can be planted in summer. In winter, it can be covered with a film or planted in a small shed, which can increase the temperature and promote the whole seedlings. The germination rate of the seeds used should be more than 75%. Less than 50% of the seeds are not suitable for seed application. Varieties should use strong varieties of purple flowers, the current season with small onions and Fujian chives performed better. General sowing 60-80 days after harvest, 30 days after transplanting can be gradually harvested.
Fine site preparation
Chives are suitable for loamy, fertile, drained and watered loamy soils and heavy lands. They are not suitable for planting in sandy lands. They require a balanced supply of nitrogen, phosphorus, potassium, and trace elements. They cannot use nitrogen fertilizers alone. Avoid binding. Survive in the soil. Before planting chives, the land must be fully sun-dried to minimize the number of pests. Generally, organic fertilizer is used as base fertilizer, and 2000-2500 kg of organic fertilizer is completely decomposed at every 667°C. For lands that are susceptible to pests, promote the use of refined organic fertilizers that can prevent barrow-thickness problems. Each mu of refined organic fertilizer 50-100 kg.
Dense planting
Drilling or sowing method is used. Drilling distance is 10 cm, and cover soil is 1.5-2 cm thick. Use 2-4 kg per acre. Onion noodles should not be too wide and too long, generally 1.-1.5 meters wide and appropriate, the length of 15-20 meters is appropriate. Excessive width is not conducive to management, and too long is not conducive to drainage. Summer and low-lying plots are to be made of sorghum 15-20 cm above the ground with drainage around them. The depth of shallots should not be too deep, and the density should not be thin. The transplanting depth is 6-7 cm and the density is about 200 per square meter.
Such as nursery transplanting, 40-50 days after sowing can be transplanted, every 8-10 a hole, spacing 12-20 cm, 8-10 cm hole distance, should not be deep shallow, 4-6 cm is appropriate, Plant water in a timely manner.
Fertilizer pipe
Due to the shallow distribution of chives roots, the water requirement is less than that of onion, but it is not tolerant to drought. The suitable soil moisture is 70%-80%, and the suitable air humidity is 60%-70%. Under strong light conditions, the tissue tends to age, fibers increase, and the quality deteriorates. After planting, shallow water should be used for irrigation. It should not be affected by drought or stains. Before and after emergence and survival after transplanting, the soil should not be arid, should be well-watered, control the watering of seedlings at the 1-3 leaf stage and after transplanting, and loosen the soil 1-2 times to promote root growth. Pour water once a day. Dilute manure is applied at a concentration of 10%-20%, and urea is applied at a concentration of 0.20%. Roots should be soiled 1-2 times in the later period. In summer, the temperature is high and the light is strong.
Prevent pests
The diseases of chives include downy mildew and soft rot. The pests mainly include green onion, red spider, and leaf miner. In order to reduce pollution, it is advisable to use 2% of Suave or 1.50% Sudan to kill insects with high-potency and low-toxicity pesticides. Spray 50kg per mu for 50kg of water. For the disease, 1:500 times of 25% metalaxyl or 1:500 times of 70% mancozebite can be sprayed.
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