How to increase corn yield with corn cultivation technology

Today I will introduce to you the cultivation technology of corn. It is easy to understand. Please take a look:

1. Reasonable rotation of corn

1 Land preparation: For bean stubble fields, autumn plowing and deep tillage are adopted; for straw return fields, shallow plowing and deep tillage or flat plowing and deep tillage are adopted (shallow plowing is 12-15cm, flat plowing is 18-20cm, and deep tillage has a depth of 25-35cm).

2. Implement corn-bean-mixed crops or corn-bean rotation. The land should be flat and well-drained. Harrow the land in time after turning over, and the raking depth should reach more than 15cm.

In autumn, ridges are made, and deep loosening and deep fertilization are carried out at the bottom of the ridges. The deep loosening is 30-35cm, and the fertilization depth is more than 15cm.

Corn cultivation technology

2. Corn seed selection and seed treatment

1 Selected high-quality seeds must be purchased from formal departments, and the variety introduction must be obtained in order to check the production date, variety quality, purity, cleanliness and test the germination rate.

2 Seed treatment: Use coated seeds as much as possible. If the seeds are not coated, the seeds should be selected before sowing and then exposed to the sun for 1-2 days to improve the germination and emergence rate of the seeds.

3. Scientific fertilization of corn

Apply 3-4m3 of farmyard manure for every 667m2 of base fertilizer. Regardless of intercropping or direct seeding, the base fertilizer should be applied at one time.

4. Corn Planting

1. Early sowing at the right time: When the ground temperature in the 5cm soil layer stably exceeds 7-8 degrees, it is the beginning of corn sowing. The best sowing period is generally from May 1st to May 10th. Determine the sowing depth according to the soil moisture and spring temperature conditions, 3-5cm is appropriate: if the soil moisture is poor, the depth is about 5cm; if the soil moisture is good and the temperature is low, it can be sown shallowly, 3-4cm is appropriate.

2. Use an air-suction precision seeder to sow seeds on the ridges. Generally, sowing and fertilizing are completed at one time. The distance between seeds and fertilizers should be kept at 5 cm on the side and 3 cm deep.

5. Reasonable density of corn planting

Reasonable close planting can make the leaf area index develop dynamically and reasonably, reduce light reflection, increase the interception and absorption of light, and make the group receive good light. When the rod clover is under strong light conditions, the light intensity around the base leaves is still above the light compensation point. All leaves carry out more photosynthesis than the field, produce more dry matter, and can improve the utilization rate of light energy. In addition, the planting method is the configuration method of plants in the field. Under the same density or leaf area index, different planting methods will result in different light distribution in the group. The appropriate row and plant spacing should be determined based on the comprehensive balance of variety characteristics, density, production conditions and natural conditions. In production, a wide and narrow row planting method of 0.7-0.8m wide and 0.4-0.5m narrow is generally adopted, or a row spacing of 0.6-0.7m is adopted, and the plant spacing is 0.25-0.3m. The seedling density per 667m2 is 4000-4500 plants, and the principle of dense planting for fertile land and sparse planting for lean land is mastered.

6. Corn Field Management

1. Check the seedlings and replant. During the seedling planting process, if there are missing seedlings or broken ridges, you can germinate and replant in time or transplant the seedlings after a slow period, or leave two plants in the adjacent place. When replanting, you must soak the seeds and germinate them 3 days in advance, and check the emergence of the seedlings at the replanting site 3-5 days after replanting. After the emergence of the seedlings, apply an appropriate amount of quick-acting fertilizer to promote rapid growth; replanting should be carried out in the 2-3 leaf stage of the seedlings combined with field and seedling determination, select the seedlings that grow healthily in the dense seedlings for transplanting, and give the seeds an appropriate amount of topdressing after the slow seedling period.

2. Thin out the seedlings at the right time and remove them thoroughly. When the seedlings are 3-4 leaves, determine the appropriate time for thinning and thinning according to the seedling vigor in the field. If the seedlings are strong and the field is strong, it is appropriate to thin out and thin them early, while if the seedlings are weak, it can be thinned in the evening or late. When thinning the seedlings, it is necessary to ensure that strong and large seedlings are selected in each hole, and small and weak seedlings are removed. The temperature and soil water and fertilizer conditions of plastic film corn in early spring are good, which is very beneficial to the growth of seedlings. After jointing, tillers are easy to grow from the base of the stem, affecting the growth and development of the main stem. It must be checked at any time to find and remove them early.

3. Reasonable fertilization: Corn fertilization generally requires sufficient base fertilizer, early seedling fertilizer, heavy ear fertilizer, and supplementary grain fertilizer. The base fertilizer is 20-25 dan of water manure or 2000 kg of high-quality farmyard manure per mu, and topdressing should be done by furrow strip application or dark application.

4 Chemical control to prevent lodging. When the seedling density is greater than 4,500 plants/mu, chemical control agents such as Jindele and Yuhuangjin must be sprayed when 6-9 leaves are visible (before the jointing stage) to shorten the length of the base internodes, enhance the toughness of the base nodes, promote root growth, and prevent corn from lodging.

7. Corn Harvest

After the corn reaches full maturity, it can be harvested when the moisture content of the grain drops to 28-30%. Harvesting methods: 1. Manual cob removal and threshing with a thresher. 2. Mechanical cob removal and threshing with a thresher, and shredding the straw and returning it to the field; 3. After freezing, combine harvesting and threshing directly, and shredding the straw and returning it to the field. Regardless of the harvesting method used, it is necessary to consider whether it is conducive to grain dehydration, straw processing and autumn tillage, and storage. The method to be chosen should be determined flexibly according to local conditions and your own conditions.