It is better to apply ammonium bicarbonate as top dressing in winter crops
One is fast fertilizer efficiency. Ammonium bicarbonate belongs to ammonium nitrogen fertilizer, which can be directly absorbed and utilized by crops after being applied to the soil. Under normal circumstances, if urea is applied to the soil, it needs to be completely converted into ammonium nitrogen. It takes 7-10 days when the ground temperature is 10℃, 4~5 days when 20℃, and 2~3 when 30℃ day. It can be seen that the topdressing of crops in winter or early spring, the application of ammonium bicarbonate is better than urea.
Second, ammonium bicarbonate with high utilization rate rarely volatilizes when the temperature is lower than 20°C. After being applied to the soil, ammonium ions can be quickly adsorbed by soil colloids, and its adsorption capacity is 8 times that of urea. Therefore, it is not easy to lose with water. After urea is applied to the soil, it exists in a molecular state before it is converted into ammonium nitrogen, which is difficult to be adsorbed by soil colloids and is easy to lose. '
The third is the ****** test shows that topdressing ammonium bicarbonate in winter wheat fields, the effect is 1 to 1.5 times higher than that in high temperature seasons.
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