Key points of Spring Maize cultivation

According to local conditions, Yedan 13 and Xiyu 3 were selected to popularize in plain and hilly areas, with Huayu 4, Zhongdan 32, Chenghai 1 and Expedition 808; Yedan 22 and Yedan 51 with short stalk and short growth period were selected for interplanting in cotton fields; fresh food was given priority to in the suburbs, and waxy corn such as Zhongnuo 1 could be planted (2319 mai 21.00). The scientific experiment results of applying sufficient base fertilizer and skillfully topdressing fertilizer show that the yield of corn is more than 500kg per mu, which requires about 2500 kg of farm manure, 30 kg of ammonium bicarbonate, 40 kg of superphosphate, 8 kg of potassium fertilizer and 1 kg of zinc sulfate. topdressing depends on seedling application, early topdressing seedling fertilizer, urea 4kg / mu, heavy application of small and weak seedlings to promote balanced growth When the 10-11 leaves were unfolded, they were re-topped with ammonium bicarbonate 40 kg per mu, burrowed fertilizer, and 3-4 kg urea per mu in the heading stage. Standardized cultivation and reasonable planting maize planting system include net planting and intercropping. Net corn box width 120cm, two rows of corn cultivated in the middle of the box, row spacing 40cm, plant spacing 25cm, 4400 plants per mu; interplanting with wheat and rape, compartment width 170cm, sowing (planting) two rows of corn in the middle of the reserved row, row spacing 40cm, plant spacing 20cm 23cm, 3500 plants per mu; intercropping with cotton (18530,65.00,0.35%), planting a row on the side of the box, planting about 1200 plants per mu. Sowing seedlings in the middle of March, transplanting in early April, sowing in late March covered with plastic film, popularizing nutrient bowl seedlings in areas with high scientific planting level, transplanting in the field at 3-leaf stage, and then covering with plastic film. Scientific management, the cultivation of strong seedlings is lack of seedlings to make up for planting, early breeding of prepared seedlings, found that lack of seedlings as soon as possible transplanting. The second is to control diseases and insect pests, and poison baits are used to control ground tigers and insect pests at seedling stage, such as trumpet stage, poisonous soil granules are made from Furan Dan mixed with fine soil, and applied to corn heart leaves with 3 grains per plant to control corn borer; Jinggangmycin is applied in the later stage to control sheath blight and peel off basal leaves; third, soil choking is cultivated, which is combined with topdressing 10 cm soil at jointing stage to promote aerial root growth. Fourth, clear ditches and drain stains, and corn in paddy fields should do a good job in ditching and drainage to prevent waterlogging damage. Fifth, auxiliary pollination. Intercropping corn in cotton field has low planting density and low pollination rate between plants. Artificial auxiliary pollination should be carried out in the period of male and female silking in order to increase seed setting rate and obtain high yield and bumper harvest.