The main characteristics of urea

Urea is the largest variety of nitrogen fertilizer. Its main advantages and disadvantages are:

1. With high nitrogen content, urea nitrogen content is between 44% and 46%, which is the highest nitrogen fertilizer in solid nitrogen fertilizer. The nitrogen per kilogram of urea is equivalent to 2.4 kg of ammonium sulfate or 2.7 kg of ammonium bicarbonate. Due to the high nitrogen content of urea, it is more efficient in transportation, storage, packaging and application than other nitrogen fertilizers. Therefore, urea is a favorite nitrogen fertilizer for farmers, but it is precisely because of the high nitrogen content of urea, so it is necessary to control the amount of fertilizer. If the control is not strict, the utilization rate will be low. In serious cases, burning the seedlings will pollute the environment.

2. It is easily soluble in water, and its physical and chemical properties are relatively stable before it is applied to the soil, and its hygroscopicity is relatively small. It is a readily available nitrogen fertilizer with a relatively stable shape.

3. Urea is a neutral fertilizer, widely suitable for all kinds of soil and a variety of crops, long-term application will not make the soil worse, when the nitrogen is absorbed, the remaining carbonate can still promote other elements that are not easily soluble in water Dissolve and become an effective ingredient.

4. Compared with ammonium nitrogen fertilizer, fertilizer efficiency is relatively slow, so urea for top dressing should be applied in advance.

5. After the urea is applied to the soil, the conversion products are ammonium carbonate and ammonium bicarbonate. Therefore, the agricultural chemical properties of urea are similar to those of ammonium bicarbonate, and it also causes ammonia volatilization loss.

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