First, choose the appropriate variety. According to local conditions, it is appropriate to choose suitable road-optimized species. According to the thermal resources and actual production of Changzhi County, mid-late-maturing varieties with a growth period of 120-130 days should be selected.

Second, fine soil preparation. Spring maize requires deep plowing, and the sooner the autumn plowing, the better. After the harvest of the former crop, the stubble crop is promptly extirpated, which is beneficial to soil maturation, water storage and conservation, elimination of diseases, insects, and weeds. After cultivating, you must take care of it. In late autumn and early spring, we must also carry out work. In areas where the spring drought is severe, continuous operations such as pressure, concrete, and ramming are used to make the soil compact and more conducive to lifting and protecting the soil. For areas where the soil moisture content is good, direct sowing can be done. For areas with insufficient moisture, make up for sowing.

Third, seed selection and processing. It is best to choose the seed to be coated when purchasing the seed. For seeds that have not been coated, seed processing such as seed selection, sun seeding, and seed dressing for seed dressing should be done before sowing. 50% phoxim EC 50g can be used as a seed dressing. After adding 1.0 kg of water and evenly mixing, evenly spray on 20 to 30 kg of seed, boring 3 to 4 hours to spread out, and drying after sowing can effectively control underground pests; 25% triadimefon wettable powder can be seeded with 0.3%～0.5% of the seed amount, or with 12.5% ​​speedup WP according to the seed amount of 0.4%～0.5%, which can effectively prevent corn schistosomiasis and other diseases occur.

Fourth, appropriate sowing. The early sowing of spring corn can easily lead to low-temperature rotten seedlings and the emergence of seedlings is uneven, and sowing late can lead to late grain failure. When the soil surface is 5 to 10 cm deep and the temperature is above 10 to 12°C, sowing can be performed.

Fifth, apply the base fertilizer. Due to the long growing period of spring corn, the principle of using multiple substrates should be mastered when using base fertilizers. Organic fertilizers should also be used as base fertilizers, combined with one-time application of soil preparation, and generally 2000 kg organic fertilizer per acre. At the same time, with the application of chemical fertilizers, 30% of the total amount of nitrogen fertilizer can be used as the base fertilizer. Phosphorus and potassium fertilizers can be used as seed fertilizers when applied at the time of sowing. Usually, 15 kg of ammonium phosphate, 10 kg of potassium sulfate, and sulfuric acid are applied. Zinc 1 to 1.5 kg.

Sixth, reasonable dense planting. Increasing planting density is an important factor in achieving high yields of spring maize. The soil fertility of higher plots is generally more than 4,000 planting densities; the lower soil fertility plots are suitable for 3500-4000 plants per acre, and the sowing volume is 2 to 2.5 kilograms.

Seven, chemical weeding technology. We must choose safe and reliable herbicides for corn fields and master their correct methods of use. Chemical herbicides used in general spring corn fields can be treated with soil remediation agents such as et al. For a block with poor soil sealing effect, it can also be used in the 3 to 5 leaf stage of corn. When the weed grows to 2 to 4 leaf stage, 4% of Yu Nongle Suspension is used in an amount of 100 liters per mu, and the amount of water is 30 to 50 kilograms were sprayed to kill weeds.

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