Simple cultivation techniques of "Zheng onion No. 1" in spring

Variety introduction "Zheng onion No. 1" is tall, thick and long, fast-growing, high-yield, strong stress resistance, delicious taste and can be sown in spring and autumn.

Second, sowing soil preparation and sowing from March to May in spring, using the method of trenching and direct seeding. The base fertilizer should be fully applied, with 3 to 5 cubic meters of farm manure and 40 to 50 kilograms of ammonium bicarbonate per mu. After ploughing, directly put the line to open the ditch, the ditch distance is 70 cm, the ditch width is 20 cm, the depth is 20 cm, one ditch has two rows. Sprinkle compound fertilizer in the ditch before sowing, and then hoe again to make the soil fertilizer uniform. Two small ditches were opened side by side on both sides of the ditch, and the green onion seeds were sown in the trench. After sowing, the covered soil was 1.5 cm thick, and the sowing amount per mu was 0.8 kg.

Third, management after sowing, watering immediately after sowing, and then spraying herbicides to seal off under water. The temperature is low in spring and the emergence of seedlings is slow. The ground should be kept moist 20 days after sowing, but do not flood. After emergence, pay attention to timely watering or flushing dilute dung water to lift seedlings, and pay attention to loosening the soil after watering. When the seedlings entered the rapid growth period, the seedlings were carried out between 1 and 2 times, the seedlings and weak seedlings were removed, and the seedlings were replenished in time, leaving 36000 ~ 38000 seedlings per mu. Combined with watering, quick-acting nitrogen fertilizer or N-P-K ternary compound fertilizer was applied 2-3 times, 10-15 kg per mu each time to promote the rapid growth of seedlings.

Fourth, summer management high temperature and rainy summer, first, to prevent weeds from eating seedlings. Second, prevent water stains.

Fifth, after Autumn Management enters August, the weather is getting cooler, the temperature difference between day and night increases, green onions begin to grow, and topdressing should begin to apply 20 kg of nitrogen, phosphorus and potassium ternary compound fertilizer per mu, then sprinkle 15 kg of urea, shallow hoe, and then watering to promote growth. From late August to early September, the climate is suitable, it is the green green growth period, continue to fertilize, and carry out soil cultivation, the height of soil cultivation is not buried in the heart of the leaves, so that the back of the original ridge into a ridge, soil cultivation and watering. The yield of green onion increased significantly in late September, and it was also the peak period of fertilizer production and demand, so soil cultivation should be carried out again. After soil cultivation, 20 kg urea and 20 kg N-P-K ternary compound fertilizer were applied, and then watered thoroughly. After entering October, no longer apply fertilizer, the ground can be kept moist.