Apply panicle fertilizer. Panicle fertilizer is the most important top-dressing in corn growth. It is applied during the big bell-mouth period of corn, and individual earlier plants can feel “smallpoxâ€. The time of application of panicle fertilizer can also be determined according to the number of days after sowing. Generally, spring sowing maize in open field is 60-65 days after sowing (late-maturing varieties), 58-60 days (mid-maturing varieties), and 50 days (premature varieties). Pan ear fertilizer. The panicle fertilizer is mainly available nitrogen fertilizer, and the application amount is 50-60% of the total nitrogen. Generally, 10-15 kg urea is applied per acre. Phosphorus and potassium fertilizers are not applied to the base fertilizer and the seedling fertilizer. Each 10 kg of potash. Pan-fertilizer can be applied between two rows of corn, and can also be applied in a hole, immediately after the application, to prevent the fertilizer from volatilizing and losing. Insufficient growth or uneven growth of the early stage of the field should be applied early, and the vigorously growing field should be delayed.
Qinggou earth. Combining the application of panicle fertilizer to clear ditch and cultivating the soil of Qinggou ditch on the base of corn is beneficial to improving the lodging resistance of maize, and it is also conducive to drought resistance and stain prevention. In earth-cultivation, it should be noted that the clay loam soil should not be used after the rain. After the rain, soil cultivation will cause soil compaction and gas shutoff. The soil air will be insufficient. In the dry land without irrigation conditions, it is not suitable to cultivate soil, otherwise it will affect the growth of corn due to drought, especially in the later period, causing excessive evaporation of soil moisture.
Artificial castration. Artificial detaches as long as the proper method can generally increase production by about 10%. It should be done when the tassels have just been removed without flowering. When removing one line, one line is removed every other line, and it is also possible to decapitate the septum, generally not more than 1/2 of the total field number. Do not emasculate at the edge of the field or at the head of the field to avoid affecting pollination. After pollination, all tassels can be trimmed to increase the population's illumination. Don't remove the leaves when you are emasculating.
Auxiliary pollination. Artificially-assisted pollination can promote good pollination and improve the seed setting rate, which is an important measure to prevent baldness. When pollen is sprayed in the morning, 2-3 male spike branches are taken and the pollen is dropped on the female flower line. Generally, it can be carried out successively 2-3 times. It can also be used at 9-10 hours in the morning. Lightly catching the spike
Remove unnecessary ears. The field with high fertility and low density is prone to a phenomenon of multiple spikes, especially fresh waxy corn and sweet corn. Except for a few plants with particularly good growth, one can leave two spikes, and one plant usually leaves one ear. Yes, to reduce nutrient consumption and increase the commodity rate of corn ear. However, it should be noted that when eliminating unnecessary ear of corn, it is not possible to damage and remove the ear leaf, otherwise it will not be worth the candle. Individual fresh sweet corn varieties, but also remove excess tillers to prevent nutrient consumption.
Prevent pests and diseases. The end of the leaf stage is a suitable period for preventing and controlling corn borer. When the planting rate of the flower leaf reaches 25% or more, the prevention and treatment should be carried out. It is better to use an agent for filling the core or applying granules to the bell mouth. It is also possible to use BT powder 800-1000 times solution. Spray control. In the early stage of disease, corn spot can be controlled by spraying with 64% antivirus WP 1000 times solution or 80% San Desheng WP 600-800 times solution, spraying once every 7-10 days, and spraying 1 -2 times.
Timely harvest. Harvesting corn can be harvested 22-25 days after pollination. Sweet corn harvest time and preservation time is short, and it requires sales, food, and processing on the day of picking the same day, and the quality of the long-term storage period will decline. Common hybrid corn harvested seeds are generally harvested 40 days after pollination.
Qinggou earth. Combining the application of panicle fertilizer to clear ditch and cultivating the soil of Qinggou ditch on the base of corn is beneficial to improving the lodging resistance of maize, and it is also conducive to drought resistance and stain prevention. In earth-cultivation, it should be noted that the clay loam soil should not be used after the rain. After the rain, soil cultivation will cause soil compaction and gas shutoff. The soil air will be insufficient. In the dry land without irrigation conditions, it is not suitable to cultivate soil, otherwise it will affect the growth of corn due to drought, especially in the later period, causing excessive evaporation of soil moisture.
Artificial castration. Artificial detaches as long as the proper method can generally increase production by about 10%. It should be done when the tassels have just been removed without flowering. When removing one line, one line is removed every other line, and it is also possible to decapitate the septum, generally not more than 1/2 of the total field number. Do not emasculate at the edge of the field or at the head of the field to avoid affecting pollination. After pollination, all tassels can be trimmed to increase the population's illumination. Don't remove the leaves when you are emasculating.
Auxiliary pollination. Artificially-assisted pollination can promote good pollination and improve the seed setting rate, which is an important measure to prevent baldness. When pollen is sprayed in the morning, 2-3 male spike branches are taken and the pollen is dropped on the female flower line. Generally, it can be carried out successively 2-3 times. It can also be used at 9-10 hours in the morning. Lightly catching the spike
Remove unnecessary ears. The field with high fertility and low density is prone to a phenomenon of multiple spikes, especially fresh waxy corn and sweet corn. Except for a few plants with particularly good growth, one can leave two spikes, and one plant usually leaves one ear. Yes, to reduce nutrient consumption and increase the commodity rate of corn ear. However, it should be noted that when eliminating unnecessary ear of corn, it is not possible to damage and remove the ear leaf, otherwise it will not be worth the candle. Individual fresh sweet corn varieties, but also remove excess tillers to prevent nutrient consumption.
Prevent pests and diseases. The end of the leaf stage is a suitable period for preventing and controlling corn borer. When the planting rate of the flower leaf reaches 25% or more, the prevention and treatment should be carried out. It is better to use an agent for filling the core or applying granules to the bell mouth. It is also possible to use BT powder 800-1000 times solution. Spray control. In the early stage of disease, corn spot can be controlled by spraying with 64% antivirus WP 1000 times solution or 80% San Desheng WP 600-800 times solution, spraying once every 7-10 days, and spraying 1 -2 times.
Timely harvest. Harvesting corn can be harvested 22-25 days after pollination. Sweet corn harvest time and preservation time is short, and it requires sales, food, and processing on the day of picking the same day, and the quality of the long-term storage period will decline. Common hybrid corn harvested seeds are generally harvested 40 days after pollination.
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