Urea three taboo corn
At this stage, it is a period of maize fertilization. Farmers fertilize mostly urea. However, the incorrect fertilization habits not only cause a waste of energy and labor, but also hinder the growth of corn.
After the mixture of urea and ammonium bicarbonate is applied to the soil, it must be converted into ammonium carbonate or ammonium bicarbonate before it can be absorbed by the corn. The conversion rate is much slower under alkaline conditions than under acidic conditions. Ammonium bicarbonate is alkaline after application to soil and has a pH of 8.2-8.4. The combination of ammonium bicarbonate and urea can greatly reduce the rate of conversion of urea to ammonium carbonate or ammonium bicarbonate, which can easily lead to loss of urea and volatilization losses.
In the surface application of urea must be applied to the surface of the earth. After 4-5 days of conversion at room temperature, it can be absorbed by the corn. Most of the nitrogen is volatilized during the ammoniation process, and the utilization rate is only about 30%. If it is applied to soils with high contents of alkaline soil and organic matter, the loss of nitrogen will be more, so urea cannot be applied on the surface.
Immediately after application of urea, urea is an amide nitrogen fertilizer that must be converted into ammonium nitrogen before it can be absorbed and utilized by the corn. In the conversion process, due to different conditions such as soil quality, moisture, and temperature, the time will vary, usually 2-10 days to complete. If urea is applied immediately after application or before dry rain, urea will be lost immediately.
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