First, the effect of ammonium bicarbonate is faster than that of urea: due to the low temperature in winter and spring, urea can not be directly absorbed and utilized by the crop after it is applied to the soil, but must pass through the urea enzyme in the soil before being absorbed by the crop. The conversion process usually takes 10 to 12 days), which is not conducive to the early growth of winter and spring crops; while ammonium bicarbonate does not need to be directly absorbed through this transformation process, so the fertilizer effect is of course fast. Therefore, whether the winter and spring crops are used as base fertilizer or top dressing, the effect of ammonium bicarbonate is much faster than that of urea.
Second, the ammonium bicarbonate fertilizer efficiency loss is smaller than urea. Ammonium bicarbonate is generally stable when the temperature is lower than 15 ° C, and the volatilization loss is less. After applying soil in winter and spring, ammonium ions and ammonium hydrogencarbonate ions are decomposed. Because the ammonium ion is positively charged, it can be directly adsorbed by the soil colloid (negatively charged), and then slowly released, which can be absorbed and utilized by the crop in time, so the loss of fat is not lost. However, urea is not. When winter and spring are applied to the soil, urea is dissolved in the soil solution in a molecular state and cannot be adsorbed by the soil colloid. This will easily cause loss of fertilizer.
To this end, it is recommended that farmers friends, in the winter and spring vegetable cultivation, in order to make vegetables early market, to seize the time difference benefits and reduce cultivation costs, please choose ammonium bicarbonate.
Author: Xue Yuhua Source: Daan Yongso town agricultural service station integrated group
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