Applying ammonium bicarbonate as a nitrogen fertilizer in winter and spring
In the winter and spring cold seasons when applying nitrogen fertilizer to crops, ammonium bicarbonate is the best choice. After the ammonium bicarbonate is applied to the farmland, it can be directly absorbed and utilized by crops without conversion. Nitrogen can be supplied in time and the effect of increasing production is good. Urea should be used in the high temperature season. Experiments have shown that when the temperature is 5°C, 10°C and 20°C, the conversion of urea takes 15 days, 7-10 days and 4-5 days, respectively, and only 2 days when the temperature is 30°C. Due to the low temperature and weak microbial activity in winter and spring, the conversion rate of urea is very slow and can not supply crop nitrogen nutrition in time. Ammonium carbonate is just the longest in this respect. On the other hand, ammonium bicarbonate has less input than urea. Urea is applied to the farmland. Before it is converted, it is mostly present in the soil in the molecular state. It is easily wetted or sinks into the depth of the soil with rainwater, causing loss and reducing fertilizer efficiency. The soil colloids have a strong adsorption capacity for ammonium bicarbonate, which is 9.09--12.5 times higher than that of urea. Under low temperature conditions, the loss of volatilization is small, and the rate of moisture penetration is also small, only about 1/3 of urea.