Ammonium bicarbonate (NH4HCO3), abbreviated as ammonium bicarbonate, and ammonium carbonate were also weighed, and the nitrogen (N) content was about 17%. Pure product is a white powder crystal, industrial products are slightly gray, and ammonia smell. Ammonium bicarbonate generally has a water content of 5% to 6%, is easily deliquescent, and is easy to agglomerate. Below 20°C, the temperature is still relatively stable. If the temperature is slightly higher or the moisture in the product exceeds a certain standard, ammonium bicarbonate will be decomposed into ammonia gas and carbon dioxide. The gas will dissipate in the air, causing a loss of nitrogen fertilizer efficiency. The solubility of ammonium bicarbonate is smaller than that of other solid ammonia fertilizers, but it is more soluble in water, and it is a physiologically neutral quick-acting nitrogen fertilizer. It is the lowest nitrogen content in solid nitrogen fertilizer. Ammonium bicarbonate is suitable for all kinds of crops and all kinds of soils. It can be used as base fertilizer or top dressing. When ammonium bicarbonate is used as a basal fertilizer, it can be applied or applied. If it can be combined with intensive cultivation, its effect will be better. However, it should be noted that the depth of application should be greater than 6 cm (the sandy soil can be deeper), and immediately after the application, the soil should be covered. Only in this way can the loss of nitrogen be reduced. When ammonium bicarbonate is used as topdressing, the dry field can be combined with cultivator, and the depth should be less than 2 inches, and immediately cover the soil. Water must be supplied in a timely manner. Paddy field should maintain a shallow water layer of about 1 inch, but not too shallow, otherwise it is easy to injure the root, and it should be carried out in time after application. The purpose of this is to make the fertilizer well absorbed by the soil. When you use ammonium bicarbonate as a top dressing, remember not to spread it just after it has rained or before the dew has dried up. Ammonium bicarbonate should not be used as base fertilizer or topdressing fertilizer and should not be applied on the surface of the soil to prevent the nitrogen from evaporating and causing loss of nitrogen or injuring crops. The use of ammonium bicarbonate to master the basic principle of "one can not leave the earth, two not leave the water" to prevent running nitrogen and injury. Ammonium bicarbonate should pay attention to the following issues:
(1) Ammonium bicarbonate cannot be mixed with alkaline fertilizers to prevent the volatilization of ammonia and cause loss of nitrogen.
(2) To achieve "five indecisions": that is, if the soil is not mixed, if there is no dew, if it does not rain, there is no water in the field, and there is no water in the sun. If the fertilization time is sufficient, it is best to use ammonium bicarbonate as a ball or granular fertilizer. In addition, when transporting and storing ammonium bicarbonate, it must be lightly loaded and unloaded, packed tightly, stored in a cool and dry place, and must not be mixed with alkaline fertilizers, human waste, etc. to avoid loss of effective fertilizer.
(3) Do not touch the seeds, roots, stems or leaves of the crop during application so as not to burn the plants.
(4) Do not grow fertilizer, otherwise it may affect seed germination.
(5) Avoid mixing with fungus fertilizer: Ammonium will release ammonia gas after application, and contact with fungus fertilizer will make the live bacteria in the fungus fatal, so that the fungus will lose its effect.
(6) Avoid foliar spray: When the ammonium ammonium carbonate is sprayed on the leaves, it is easy to burn the leaf surface and affect the photosynthesis of the crop leaves.
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