Key points of Seedling cultivation of Spring Maize

At present, we are about to enter the sowing season of spring corn, so we should do a good job of seedling raising and transplanting in production to promote the early development and stable growth of maize and achieve high and stable yield. The fertilizer nursery bed is planted in a nutrition bowl, and a seedbed with a width of 1.5 meters and a length of 20 meters per mu is prepared in the field. 250 kg of rotten organic fertilizer, 2.5 kg of compound fertilizer and 2.5 kg of urea are applied in the bed, and the pot is mashed evenly and covered with film in an arch shed in time. The seedlings were transplanted with milk seedlings in plastic trays, with a seedling bed of 1.5 meters wide and 2.2 meters long and 12 rice seedling trays with 561 holes per mu. Fertilize and prepare the field in time after sowing, and cover the transplanting line with 65-80 cm wide plastic film to ensure timely transplanting. At present, there are many Rain Water, so it is appropriate to popularize and apply the transplanting method of plastic film of nursing seedlings in order to resist natural disasters. The amount of seed used in the field of seed treatment and transplanting was 1.5 kg per mu and that of direct seeding was 2.5 kg per mu. Sunny days were selected for 2-3 days before sowing to enhance seed activity and germination rate. Sowing at different levels to improve the emergence rate and uniformity. The sowing time of timely sowing and planting spring corn varies with different sowing and transplanting methods. The suitable sowing date is March 15-20, the seedling age is 15 days, the transplanting leaf age is from 1 leaf, 1 heart to 2 leaf stage, the suitable sowing time is March 20-25, the seedling age is 30 days, and the transplanting leaf age is 3 leaves and 1 heart stage. Direct seeding corn is generally sown at the end of March and the beginning of April, using shallow ditch point sowing method. Edible green corn cobs can be sowed in batches with an interval of 10 to 15 days to prolong the time on the market. In general, 1250 kg of mature organic fertilizer, 25 kg of ternary compound fertilizer and 25 kg of ammonium bicarbonate were applied per mu of field 10 days before transplanting. The density of spring maize is suitable for intercropping and interplanting, and the transplanting density is different between fields. In the multi-cropping system, such as watermelon interplanting corn, it is appropriate to plant 2 rows of corn on each side of the furrow, with a plant spacing of 23 cm and about 1500 plants per mu; for other intercropping corn, it is appropriate to keep a small row spacing of 50 cm, a large row spacing of 67 cm, a plant spacing of 17 cm and a plant spacing of about 5000 plants per mu. Empty stubble transplanting corn, make 2.3m wide border, ditch width 27cm, each border planting 4 rows, plant spacing 23 cm, about 5000 plants per mu. Control pests on early spring corn are mainly ground tigers and aphids. The control of land tigers can be trapped and killed at the corn seedling stage with poison bait (0.5 kg of 90% crystal trichlorfon and 2.5 kg of water sprayed on 50 kg of fried rapeseed cake or cottonseed cake). The number of poison baits depends on the area; you can also spray or splash the ground with 48% chlorpyrifos EC 100 ml plus water 50 kg per mu. Imidacloprid and water spray can be used to control aphids.