First, topdressing
The earing stage is the period when the corn needs the most fertilizer and the maximum fertilizer intensity. The absorption of nitrogen, phosphorus and potassium accounts for 50-55%, 52-60% and 75-85% of the total absorption of corn. Among them, the big bell mouth period, the highest absorption intensity before and after, the yield of 400 kg of land, 75 kg of ammonium per acre or 25 kg of urea, can be applied before the big bell mouth. More than 700 kg of output, 150 kg of ammonium bicarbonate per mu or 50 kg of urea, applied in 3 times, combined with irrigation to improve fertilizer efficiency.
Second, irrigation
At the ear of corn, the water consumption is the largest, accounting for 30-35% of the total water consumption in the whole life. The water consumption intensity during the tasseling period is the largest, which is the critical period of corn water demand. Drought and water shortage will cause different degrees of production reduction or even harvest, which will seriously affect Yield, so the ear of corn should be drought-resistant and preserved. For example, from late July to early August of 2004, Ganzhou City has been dry and rainless, and summer corn is dry and yellow. At this time, it is necessary to irrigate in time. Otherwise, the loss is immeasurable.
Third, strengthen cultivating and cultivating soil
Interplanting can improve soil permeability and fertilizer supply, promote root development, and remove weeds. Soil cultivation is conducive to the development of aerial roots and effectively prevents lodging. Years with heavy rainfall can be diverted through cultivating.
Fourth, pest control
The corn trumpet period should be controlled against corn borer, and it is also the third generation of cotton bollworm. Control method: use 3% carbofuran 0.5-1 kg per acre to make toxic soil and sprinkle it into the heart leaf to reduce the pests to a minimum.
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