How to manage planting corn in summer?

How to manage planting corn in summer? Please give guidance to summer corn planting can refer to the following methods for management: first, reasonable determination of planting density is the key to achieve high yield and bumper harvest of corn, according to the characteristics of varieties and the level of soil fertility and other factors to determine the appropriate density, timely interseedling and fixed seedlings to ensure planting density. Generally check the seedlings immediately after emergence, and leave two plants nearby in the same line or adjacent lines in order to replenish the seedlings as soon as possible. The seedlings were fixed during the period of 3 leaves and 5-6 visible leaves, and the weak seedlings, diseased seedlings and insect seedlings were removed, and the strong seedlings, uniform seedlings and uniform seedlings were retained to improve the population uniformity. For density-tolerant varieties and high-yield fields, the suitable seedling density is about 4500 plants per mu, and for sparse planting varieties and poor soil fertility, the suitable seedling density is about 3500 plants per mu. Second, scientific operation of fertilizer and water according to the law of corn water demand and soil moisture, grasp the best irrigation period, and supply water in time. After jointing, maize roots, stems and leaves accelerate growth and enter the stage of female and male ear differentiation, and the field soil water capacity should be kept at 65-75%. The flowering stage is the peak period of water demand in the corn life, which requires that the water content in the 1-meter soil layer is not less than 70% of the field capacity. The filling stage is the key period for yield formation. It is necessary to ensure the water demand of maize, effectively increase the number of grains per ear, prevent empty stalk and bald tip, and increase the 1000-grain weight of maize. In addition to the seedling stage, when the field capacity of each growth period is less than 60%, it should be irrigated in time. The formula balanced fertilization was carried out according to the maize yield target and soil fertility level. On the basis of the application of sufficient base fertilizer in the previous winter wheat, we should mainly apply chemical fertilizer, pay attention to increase the application of phosphorus and potassium fertilizer and micro-fertilizer, and phosphorus and potassium fertilizer should be applied at one time. The application of nitrogen fertilizer should adhere to the principles of light application of seedling fertilizer, heavy application of big trumpet fertilizer and topdressing fertilizer. At the jointing stage, nitrogen fertilizer was deeply applied along one side of the seedling, accounting for about 30% of the total nitrogen fertilizer, in order to promote root and seedling. In the big trumpet mouth stage, about 50% of the total nitrogen was applied to promote large panicles and grains, and attention should be paid to deep application and combined with topdressing for intermediate ploughing and weeding. During the grain filling stage, 20% of the total nitrogen was applied to improve the photosynthetic capacity of leaves and increase grain weight. On the basis of selecting disease-resistant varieties and seed coating, attention should be paid to the prediction, prediction and control of diseases and insect pests in the middle and later stages. We should focus on the prevention and control of major diseases and insect pests such as corn borer, aphids and rough shrinkage disease, so as to minimize the loss of corn yield. For weeds control, better soil moisture plots, you can directly spray 40% ethyl A mixture 200-250 ml per mu, or use 33% pendimethalin EC 100ml plus 72% dull EC 75ml mixed with 50 liters of water for closed spray. The plots with poor soil moisture can be sprayed with 100 ml of 4% Yunongle suspension agent with 50 liters of water per mu in the period of 3-5 leaves of corn seedlings and 2-5 leaves of weeds, or by directional spraying of 20% paraquat water agent with 50 liters of water in the 7-8 leaf stage of corn, or it can also be combined with intertillage for weeding. Fourth, chemical control and lodging prevention, especially in the middle and later stage, is an important factor affecting maize yield. On the basis of selecting varieties with high density resistance and lodging resistance, it is necessary to cultivate the soil in time and control it in time to prevent lodging. For plots with excessive density and serious lodging risk, 50% Daizhuangsu water agent 200 times can be sprayed before booting to enhance plant lodging resistance and improve population ventilation and light transmission conditions. Click to get more corn planting techniques click to get more food crop planting techniques