Good effect of winter and spring ammonium
2018-11-02 14:01:30
At present, farmers' friends generally have a "preferred" preference for urea. Even in the winter or early spring, it is often used as a base fertilizer or top dressing. In fact, this practice is not appropriate. Although ammonium bicarbonate is easily volatilized under high temperature conditions, the application of ammonium bicarbonate in winter and spring is better than urea.
First, the effect of ammonium bicarbonate is faster than that of urea. After urea is applied to the soil, it can be absorbed and utilized by the amide nitrogen to ammonium. The conversion rate is proportional to the temperature and the conversion is slow under low temperature conditions. According to the test, urea conversion takes 10 days at 10 degrees Celsius, and ammonium carbonate can decompose even at 5 degrees Celsius.
Second, the loss of urea is greater than that of ammonium bicarbonate. When the temperature is lower than 20 degrees Celsius, the ammonium carbonate is rarely volatilized. Immediately after being applied to the soil, the ammonium ion and the carbonate ion are strongly absorbed by the soil colloid, and then slowly released for use by the crop. Its adsorption capacity is about 8 times that of urea, and its volatilization loss is only one third of urea at low temperature. After urea is applied to the low-temperature soil, it is dissolved in the soil solution due to difficulty in conversion, and cannot be adsorbed by the soil colloid, and is easily leached by irrigation water or rainwater to cause loss of nitrogen nutrients.
Therefore, it is recommended to apply ammonium bicarbonate to crops in winter and spring, and to leave urea in the hot season. It must be pointed out that the application of ammonium bicarbonate under low temperature conditions, whether as base fertilizer or top dressing, is preferably applied at a depth of 10 cm, and the fertilizer utilization rate is high, and the yield increase effect is remarkable.
Author: Jiang Hongtao
First, the effect of ammonium bicarbonate is faster than that of urea. After urea is applied to the soil, it can be absorbed and utilized by the amide nitrogen to ammonium. The conversion rate is proportional to the temperature and the conversion is slow under low temperature conditions. According to the test, urea conversion takes 10 days at 10 degrees Celsius, and ammonium carbonate can decompose even at 5 degrees Celsius.
Second, the loss of urea is greater than that of ammonium bicarbonate. When the temperature is lower than 20 degrees Celsius, the ammonium carbonate is rarely volatilized. Immediately after being applied to the soil, the ammonium ion and the carbonate ion are strongly absorbed by the soil colloid, and then slowly released for use by the crop. Its adsorption capacity is about 8 times that of urea, and its volatilization loss is only one third of urea at low temperature. After urea is applied to the low-temperature soil, it is dissolved in the soil solution due to difficulty in conversion, and cannot be adsorbed by the soil colloid, and is easily leached by irrigation water or rainwater to cause loss of nitrogen nutrients.
Therefore, it is recommended to apply ammonium bicarbonate to crops in winter and spring, and to leave urea in the hot season. It must be pointed out that the application of ammonium bicarbonate under low temperature conditions, whether as base fertilizer or top dressing, is preferably applied at a depth of 10 cm, and the fertilizer utilization rate is high, and the yield increase effect is remarkable.
Author: Jiang Hongtao
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