Current management measures of spring sowing corn
At present, spring corn is in the jointing and booting stage, which is about to enter the period of heading, flowering and filling, and the booting stage of maize is from vegetative growth to the period of both vegetative growth and reproductive growth, and the demand for water and fertilizer is relatively high. If the supply of fertilizer and water is insufficient, it will affect ear differentiation. At the same time, the lack of water will also cause "sticking neck drought", delay heading and pollination, reduce the seed setting rate and affect the yield. The management measures are as follows: 1. Strengthen the management of fertilizer and water. Heavy chase big trumpet mouth fertilizer, generally apply 25 kilograms of urea per mu, timely watering should be carried out in case of drought, but pay attention to drainage and waterlogging in continuous rain, do not let the cornfield accumulate water. 2. Timely elimination of diseases and insect pests. Focus on the prevention and control of corn leaf spot, corn borer and corn armyworm. For the control of corn leaf spot, methyl topiramate or chlorothalonil can be sprayed at the initial stage of the disease, and corn borer and corn armyworm can be controlled with methamidophos and phoxim to reduce the harm of diseases and insect pests. 3. Strengthen the weeding and control of weeds in corn field. Paraquat can be used to mix 150 grams of 150 grams per mu with 50 kg of water, directional spray, or manual weeding can be used to reduce the harm of weeds to corn.
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The importance of getting rid of weeds in summer corn field
The growth of weeds in corn field is fast and concentrated, and when the soil moisture is good, about 10 days after sowing, the emergence rate of weeds reaches a peak, and the emergence rate reaches about 90% in 15 days. In case of rainfall or watering, there is a small peak of emergence in 4 days. The seedling stage is damaged by weeds, and the plants show short, thin culms and yellow leaves, which will also aggravate the occurrence and harm of diseases and insect pests in the corn field.
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Management and Technology of Spring Maize during Summer
At present, spring maize in Qianxi area has entered the jointing stage, which coincides with the peak period of water and fertilizer demand, and it is also the key period of yield formation, so the summer management of maize should be strengthened. First, timely topdressing of corn should be based on nitrogen fertilizer, and it is best to apply it in two stages, that is, 20 kg urea per mu in the big trumpet period.
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