High yield of direct seeding and late harvest of summer corn

In the 1960s and 1990s, the yield of wheat and maize was low, and the agricultural consumption was long. Rain Water was easy to sprout and waterlogged. Interplanting in wheat field played a positive role in promoting the increase of maize yield. Since the beginning of the new century, with the improvement of production conditions, the change of production system and the improvement of mechanization level, the yield of wheat and maize has increased greatly, the time of agricultural consumption has been shortened, drought and lack of rain, the density of interplanting corn is insufficient, the seedlings are uneven, and the diseases and insect pests are serious. it is difficult to operate in the field, so it is difficult to meet the requirements of higher yield, and the interplanting technology in wheat field formed at the middle yield level needs to be updated. It is imperative to implement high-yield cultivation techniques of maize direct seeding and late harvest in the stage of high yield and higher yield. 1. The mid-late maturity and high yield compact maize variety was selected, and the population photosynthetic high value increased continuously after anthesis, middle ear, density tolerance, lodging resistance, disease resistance, living plant maturity, growth period 100-105 days, effective accumulated temperature 1200-1500 ℃. The current representative varieties are Zhengdan 958, Nongda 108, Ludan 981, Liaoyu 18 and so on. 2. After stubble direct seeding, the row spacing is about 60 cm, sowing in trenches, making soil moisture or watering after sowing, seed coating, 2 grains per point, applying chemical fertilizer between two points, artificial soil covering 3 cm, 10 hours later, step along the ridge to ensure that the seedlings are strong. 3. Reasonable close planting to establish a reasonable population structure and ensure population uniformity is the key to high-yield cultivation. The compact variety has up-thrust leaves, large leaf orientation value, suitable for close planting, 5000 plants per mu, flat varieties, flat leaves, small leaf orientation value, suitable for sparse planting, and 3500 plants per mu. 4. Balanced fertilization of soil organic matter in high-yield fields should be more than 1%, and the amount of fertilizer should be calculated according to 3 kg of nitrogen, 1 kg of phosphorus pentoxide and 2 kg of potassium oxide for every 100 kg grain. 3000 kg of base fertilizer was applied when planting wheat. When sowing corn, urea 1015kg, phosphate fertilizer 1015kg, potassium chloride 30kg 35kg, zinc sulfate 1kg were applied between two points when the above chemical fertilizers were mixed. 50% of the total nitrogen fertilizer was applied at the big mouth stage and 20% of the nitrogen fertilizer was applied at the flowering stage. At a distance of 15 cm from the plant, apply 10 cm deep and cover the soil tightly. 5. Fine management (1) setting seedlings early: fixing seedlings at 4-leaf stage, getting weak and staying strong when fixing seedlings to ensure uniform seedlings. (2) early stubble: kill stubble before fixing seedlings to promote root growth, and spray 40% ethyl mixture or 33% dimefenalin after stubble for chemical weeding. (3) Prevention and control of diseases and insect pests: seed dressing with seed coating, control of seedling diseases, spraying omethoate after three leaves, control of sucking pests, application of phoxim poisonous sand in big mouth stage, control of corn borer, and pay attention to control aphids in the later stage. (4) cover wheat straw or wheat bran in small mouth stage: 500 kg per mu is covered in ridges, which can kill grass and fertilize the field. (5) to remove the male after heading: when the male ear is exposed, go to the other line. (6) timely late harvest: the bracts dried up, the milk line disappeared, the black layer appeared to harvest, and the grain weight was guaranteed. 6. It is suitable to popularize the Huang-Huai-Hai summer corn planting area. Click to get more corn planting techniques click to get more food crop planting techniques