Select high-quality, high-yield and multi-resistance new varieties such as Daiyu 16, Pioneer 335, Dunyu No. 2, Holographic Ludan 987, and Lin'ao No. 1. Seed quality must meet the international second-level standards, and the seed bud rate should be above 95%. According to tests, the yield of corn per 1% decline in the purity of a primary maize hybrid (98% purity) will decrease by 0.87%. In addition, sowing and fine selection should be carried out before sowing, removing mold, insects and other grains. Seed coating technology Seed coating can play two roles: drying and seed dressing. It has many functions such as sterilization, insecticidal, and promoting seedling growth, which is beneficial to seedlings and seedlings, and has obvious effect on yield increase. Optional Yufeng harvest special coating agent, dosage 50 ml package seed 5 ~ 7 kg. Harvest time early sowing technology The early stage of wheat sowing is better. The early sowing time is the key technology for the high yield of wheat and corn in summer. According to the trial, from June 8 to June 20, each day before sowing, the yield will increase by about 1% per mu. After June 20th, it will be sown every night. The yield per mu is about 1.2%. The planting density of reasonable dense planting technology is mainly determined by the characteristics of the species, such as the fertility conditions and climatic conditions. Seedling density, vertical leaf corn should be dense, flat leaf type should be thin. For example, the Pioneer 335 hybrid corn is generally 4000- 4500 strains per acre, generally more than 650 kg per mu, and the holographic Ludan 981, Great Wall 218, Zhongbei Heng-6 and other large ear varieties range from 2800 to 3300 per acre. Chemical Weeding Techniques Weeds are more harmful to corn. Corn before sowing can be used before the bud 40% of A mixture 200 ml watered 40 to 50 kg or 50% acetochlor emulsion 100 ml watered 40 to 50 kg uniform spraying between the surface, can also be used 40% of mu Astragalus water 150~200 ml watered 50 kg sprayed ground. Balanced fertilization techniques Summer maize is mainly based on fertilization, supplemented by topdressing, mainly farmyard manure, and supplemented by chemical fertilizers. Mainly nitrogen fertilizer, supplemented by phosphate fertilizer. The panicle fertilizer is mainly supplemented by granular fertilizer. Generally 4,000 kg per acre Shi farmer, urea 3 ~ 5 kg must be deep, to prevent the loss of nitrogen volatile, per acre DAP 10 ~ 15 kg, potassium chloride 10 ~ 12 kg, 1 kg of zinc sulfate. Water-saving irrigation techniques In order to ensure sufficient planting, water must be filled with wheat yellow water for 15 to 20 days before harvest. The appropriate amount of water per mu is 20 to 25 cubic meters. Seedlings of maize seedlings are thermophilic, drought-tolerant, and susceptible to drought. Proper droughts are conducive to root-enhancing seedlings. The frequency of watering at the seedling stage can be controlled by pouring 1 or 2 times in special drought years, avoiding flooding, and the relative soil moisture content is 60 % is more appropriate. The amount of irrigation water is about 60 cubic meters per mu, and the water is drained. More water is needed at the heading stage, and the headwater must be re-poured. The relative water content of the soil is kept at 65%~75%. After the jointing of maize, the use of crushed wheat straw or wheat bran 200-300 kg per mu to cover the soil surface in the field can increase the rainfall infiltration, improve the water storage capacity, and at the same time inhibit the growth of weeds and break the soil consolidation. , fertilization and other advantages. Integrated pest control techniques mainly prevent and control pests such as small tigers, aphids, armyworms, thrips, and planthoppers. The control ground tiger can use 90% crystal trichlorfon 100 grams per mu, add 2 kilograms of water with warm water, evenly mix and stir in the fragrant cottonseed cake, boring 3~4 hours after spreading on both sides of seedlings, prevent The effect can reach more than 95%. The control of armyworm, aphids, thrips and Laodelphax striatellus can be controlled with 40% omethoate 1200 times spray. Earling corn stubble can be used in large bell-mouth period with 3% phoxim granules 1.5~2 kg and fine sand 5~6 kg to lose corn kernel leaves, and 40% omethoate 1500 times spray Control locusts.
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