First, the fertilizer effect of ammonium bicarbonate is better than urea. Urea is an amide nitrogen fertilizer that cannot be directly absorbed by the crop after it is applied to the soil. Only under the action of urease secreted by soil microorganisms, it takes a long time to be converted into ammonium nitrogen, which is hydrolyzed into ammonium carbonate or ammonium hydrogencarbonate and absorbed by the crop. However, due to the low temperature in winter, this conversion process is very slow and generally takes more than 10 days. According to the test soil temperature at 20 ° C, it takes 4 days to 5 days to complete the conversion; when the soil temperature is 10 ° C, the conversion takes 7 days to 10 days. That is, the lower the temperature, the slower the conversion process of urea, and the slower the fertilizer effect. After the ammonium bicarbonate is applied to the soil, it does not need to be converted, and the crop can be directly absorbed and utilized.
Second, the loss of fertilizer of ammonium bicarbonate is less than that of urea. At less than 15 ° C, the ammonium carbonate volatilization loss is small. After being applied to the soil, it is quickly absorbed and utilized by crops, so the loss of fertilizer is less. On the contrary, when urea is applied to the soil, it is easily absorbed by the crop and is easily lost by the rain, resulting in loss of fat.
Therefore, when farmers are applying nitrogen fertilizer to crops in the low temperature stage, it is advisable to use ammonium bicarbonate instead of urea.
Second, the loss of fertilizer of ammonium bicarbonate is less than that of urea. At less than 15 ° C, the ammonium carbonate volatilization loss is small. After being applied to the soil, it is quickly absorbed and utilized by crops, so the loss of fertilizer is less. On the contrary, when urea is applied to the soil, it is easily absorbed by the crop and is easily lost by the rain, resulting in loss of fat.
Therefore, when farmers are applying nitrogen fertilizer to crops in the low temperature stage, it is advisable to use ammonium bicarbonate instead of urea.
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