Ammonium bicarbonate and urea are common fertilizers in crop planting process. They have good effects and can effectively help crops grow. However, many growers do not know the difference between the use of ammonium bicarbonate and urea. The following is a detailed analysis of carbon analysis. The difference between ammonium and urea and the method of use.
    First, the common point of ammonium bicarbonate and urea
Ammonium bicarbonate and urea are nitrogen fertilizers, which can be used as top dressing. Because both of them have strong water solubility and volatility, they all need to be covered with soil and can not be used on the surface. In addition, the two are easy to volatilize ammonia during the decomposition process, and are easy to burn when used as a seed fertilizer. If used on crop leaves, it is easy to burn the leaves.
    Second, the difference between the use of ammonium bicarbonate and urea
    1. Different fertilizer efficiency speeds
Ammonium bicarbonate is a quick-acting fertilizer, and urea is a medium-speed fertilizer. The fertilizer efficiency of ammonium bicarbonate is faster than that of urea. The conversion rate in the ground is short, and it can have an immediate effect on crops with weak growth, while urea The conversion rate in the soil is slower than that of the fertilizer. It takes about 7 days to use the fertilizer to be absorbed and utilized by the crop. Therefore, in the top dressing, if you want to achieve faster fertilizer efficiency, it is best to use ammonium bicarbonate.
    2. Whether the crop can be directly absorbed and utilized
After the ammonium bicarbonate is used in the soil, it is present in the soil in the form of ammonium nitrogen, which can be directly absorbed and utilized by the crop roots. After the urea is used in the soil, it needs to pass through a transformation period of 5-10 days, first through the soil urease. After the fertilizer is converted into ammonium carbonate, it can be absorbed and utilized by the crop roots. If it is intended to apply nitrogen fertilizer to the crop, it should be used 5-7 days before the fertilizer requirement.
    3, the difference in temperature and efficiency of different temperatures
The decomposition rate of ammonium bicarbonate has a direct relationship with temperature. The higher the temperature, the faster the decomposition rate and the greater the loss of fertilizer efficiency. When the temperature is lower than 20 degrees, the volatilization loss of ammonium bicarbonate is very small. In addition, because ammonium bicarbonate has a high solubility, even if it is used under a temperature of 5 degrees or less, it can be directly absorbed and utilized by crop roots.
Urea generally requires a conversion time of 7-10 days in a soil temperature environment of about 10 degrees, and the lower the temperature, the longer the conversion time required.
Therefore, if nitrogen fertilizer is used in winter and early spring, the effect of using ammonium bicarbonate is faster and better than that of urea. The effect of using ammonium bicarbonate at low temperature is 1-1.5 times that of urea.
    4, the loss rate in the soil is different
After applying ammonium bicarbonate to the soil, the ammonium nitrogen in the fertilizer can be adsorbed by the soil particles very stably, and the fertilizer efficiency is not easily lost with water, and the nutrient retention rate is higher than that of urea.
When urea is applied to the soil, it will dissolve in the soil solution in a molecular state. Not only is it not easily adsorbed by the soil particles, but it is easy to lose weight with water, so the nutrient stability and retention rate are not comparable to those of ammonium bicarbonate.
    5. The nitrogen content and fertilizer efficiency of the two are different.
Compared with ammonium bicarbonate, urea has a higher nitrogen content and a longer duration of fertilizer efficiency. At the same time, because urea is easier to store than ammonium bicarbonate. For example, the same is topdressing, adding 10 kg of urea to an acre of land, if you use ammonium bicarbonate, you need 25 kg .
    6, different methods of use
In terms of fertilizer efficiency, the decomposition and volatilization loss of ammonium bicarbonate is larger than that of urea. Therefore, the best fertilizer effect can be obtained by deep application of ammonium bicarbonate. The optimum fertilization depth is generally about 8 cm. Moreover, ammonium bicarbonate cannot be used in dry soil. Only a certain amount of moisture in the soil can be completely dissolved. Therefore, it is necessary to pour water after the fertilizer is used in the drought. At this point, the urea with slow fertilizer efficiency does not have such a large use limit. Sex.
Although ammonium bicarbonate and urea are all chemical fertilizers, they have different effects on crop growth, and the methods of use are different. The above are the characteristics and methods of use of small-sized ammonium bicarbonate and urea. You can learn from it.
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