Key Techniques for High Yield Cultivation of Summer Maize
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2. Seeding requirements Appropriate sowing date of maize is mainly determined according to the corn planting system, temperature, lyrics, and varieties. Early sowing is the key to increasing the yield of summer corn. Sowing density should be comprehensively determined according to factors such as variety, plant type, and environmental conditions. Early-maturing varieties should be denser, and late-maturing varieties should be thinner. Appropriate sowing depth is based on soil quality, soil moisture content and seed size, generally 3 ~ 5cm is appropriate. If the texture of the soil is heavy, the sensation is better, and it can be shallower; the soil texture is loose, and the sandy soil that is easy to dry can be properly deepened; the large seeds can be appropriately deepened.
3, early set seedlings three-leaf seedlings, five leaves Dingmiao to prevent seedling shortage. When the seedlings are removed, the weak plants will be removed and the two plants will be left in the absence of seedlings and the weak plants will be gradually removed during the management.
4. Moisture management In the case of planting enough seeds, the water is usually not watered before the small bellmouth. The purpose is to control and promote it. In case of drought, irrigation must be performed. After entering the big bellmouth period, it is not possible to have water shortage. To reach the ground surface, we must not see wetness. We must meet the demand for water in jointing, large bell mouth, tasselling, flowering and grouting of corn. We must pay special attention to pouring yellow water, and do not stop prematurely. Water to ensure the maturity of live stalks and increase grain weight.
5. The main producing areas of reasonable top-dressing summer corn are mostly double cropping system. Because the sowing time is in the busy farming season, there are many places where the seedlings are not killed and no basal fertilizer is used. In addition, the summer corn has a short growing period, and the previous period requires a large amount of fertilizer. The seedlings need to absorb a large amount of nutrients from the soil and grow early. Therefore, the summer maize should be topdressed immediately after setting the seedlings. Generally, the “zinc power†high-nitrogen compound fertilizer is applied to 20-30 kg per mu, which accounts for about 40% of the total fertilizer; 10-15 days before tasseling, the topdressing is 10-15 days per mu. "Zinc-powered" high-nitrogen compound fertilizer 30 to 40 kilograms, accounting for about 60% of the total topdressing fertilizer, top dressing method to apply or acupuncture appropriate.
6. Appropriate late harvest of summer maize Under the premise of striving for early sowing, proper late harvest is an effective measure to increase grain weight and increase production. Therefore, the corn should be harvested as late as possible without affecting the normal seeding. Our harvesting criteria are as follows: the temporal lobe is white and the grain milk line disappears completely.