Urea as foliar fertilizer utilization rate doubled the use process should be cautious

Some people ask: can the effect of urea as foliar fertilizer be doubled? I don't know what the doubling here refers to. Is it fertilizer efficiency or utilization rate? Whether the fertilizer efficiency can really double the effect of scientific development of agriculture is not guaranteed, but there is no problem in doubling the utilization rate of fertilizer, and it is certain that science can promote agriculture in this respect.

Before answering this question, it is necessary to explain the utilization process of urea! Everyone should know that urea is a kind of quick-acting fertilizer, which is generally fertilized through trenching! The root system is further absorbed and utilized so as to promote plant growth. But specifically, what the plant root absorbs is not urea, but ammonium!

First of all, after urea is fertilized into the soil, urea is decomposed into ammonium carbonate in the soil by urease catalysis; then it can be further hydrolyzed and transformed into bicarbonate and ammonium root, both of which are easily absorbed and utilized by root systems, so plants actually use ammonium root after applying urea.

The overall completion of this utilization step will take three or four days, and the premise is that the soil water content is relatively sufficient, which is also the reason why we watering the soil in time after using urea.

However, if foliar spraying is used, the situation of plant utilization of urea will change somewhat. After urea atomization, the stomata of the plant will absorb the atomized urea and enter the plant directly. The further degradation of urea in the plant will be converted into ammonium nitrogen that can be absorbed and utilized.

From the efficiency of absorption and transformation, there is no doubt that the effect of foliar spraying will be faster, and if ditching fertilization is used, urea is also easy to volatilize, thus reducing the utilization rate of fertilizer. Therefore, this is the reason why the scientific development of agriculture is certain that the fertilizer use efficiency can be doubled.

However, we are not sure about the scientific development of agriculture in terms of fertilizer efficiency, because urea, as a high nitrogen fertilizer, is very easy to cause seedling burning! If the same amount of urea is used, one uses ditching fertilization and the other uses foliar spraying, it is basically certain that foliar spraying will produce burning seedlings! Therefore, this is also an uncertain point in terms of fertilizer efficiency.

For urea foliar spraying scheme is not bad, if there is indeed a lack of nitrogen fertilizer in the field, can also be appropriate low concentration spray, the recommended concentration must be less than 0.8%, otherwise it may cause the risk of burning seedlings.

Now, in the era of the popularity of compound fertilizer, scientific development of agriculture is more recommended to choose compound fertilizer to be sprayed, and because the risk of urea is really too high, few people choose urea as foliar fertilizer in production. however, potassium dihydrogen phosphate or special low-nitrogen compound fertilizer is generally more popular.

Although urea is good, foliar fertilization should be careful!

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