Summer maize production proposal

1, timely topdressing nitrogen fertilizer. The application of nitrogenous fertilizer at the big bellmouth stage can effectively increase the fruitfulness, reduce the baldness, and prevent premature aging. First, the high-yield plots, especially the defertilizer and nitrogen-supply plots, topped up with 20 kg of urea per acre. The second is that topdressing urea fertilizers should be applied to deep ditch and cover soil to increase fertilizer utilization and promote nutrient absorption. Should be avoided as far as possible to directly surface append; Third, when planting has been enough (30 ~ 40 kg) base fertilizer plots, topdressing nitrogen fertilizer should be in the big bell mouth period or close to the big bell period, should not be applied too early to avoid Caused lodging and loss of nutrients. To ensure the demand for nitrogen in the middle and later stages of corn, to achieve large spikes, multiple grains, and grain weight.

2, cultivator, chemical control and lodging. For planting density, plant stems are high, and plots prone to lodging are found in later stages. For example, if no dwarf regulator was sprayed in the early stage, 1% to 3% of the plants may have seen tassels (5 to 7 days before tasselling). ), 40% of Maize with 30 ml per mu watered 40 kg, evenly sprayed on the upper leaves of corn plants, if heavy rain within 4 hours after spraying, should be reduced by half spray. Pay attention not to re-spray, no leakage, improve plant resistance to lodging.

3. Artificially assisted pollination. In the case of a corn flowering season where there are more than 2 days of cloudy days, heavy rain, and high temperatures, artificial pollination may be carried out. Pollination should be carried out at the corn flowering stage and on sunny days after morning dew (9 to 11 o'clock). It is advisable to use a long rope along the cage and swing the rope at both ends of the cage to shake the plants below the ear to promote pollination.

4, scientifically control pests and diseases. For corn borers, aphids, cotton bollworms and other insect pests, the best control period is the initial stage of the large bell mouths of corn. The simplest and most effective method is insecticide filling. Available 5% chlorpyrifos 1 to 1.5 kg per mu, add 5 kg of fine sand mixed, each plant 3 to 4 grams of irrigation; brown spot and other diseases prevention and treatment, when the field disease leaf rate 20%, began to spray . Optional bactericidal agents are: 50% carbendazim WP, 50% amifensin wettable powder or 90% mancozeb, etc., watered 500 times, 30-50 kg per mu, separated by 7 Sprayed once every 10 days for a total of 2 to 3 times.

5, reasonable irrigation, prevention and control of damage. The big bell-mouth period and silking period are the peak periods of corn growth and water demand. In case of drought during this period, the production will be severely reduced. In case of drought this time, water should be promptly filled to ensure the demand for water. At the same time, it should be noted that when there is continuous precipitation of water in the field, it should be eliminated in time to avoid damage.

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