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Urea Is Well Received By Farmers

Tianjin BRG Products Co.,Ltd | Updated: Aug 31, 2017

Urea nitrogen content between 44% to 46%, is the highest nitrogen content of solid nitrogen fertilizer, physical and chemical properties are relatively stable, pure white or slightly yellow crystal or small particles, plus moisture, moisture Small, soluble in water, neutral nitrogen. Urea nutrient content is higher, suitable for a variety of soil and a variety of crops, the most suitable for top dressing, Urea root top dressing effect is also very good. Urea into the soil, only in the conversion to ammonium bicarbonate can be a lot of crop absorption. Due to the existence of the conversion process, so the fertilizer effect is slow. Generally 4 to 6 days in advance to apply. At the same time also requires deep casing, after the application should not immediately irrigation, Urea to prevent nitrogen leaching to deep, reduce fertilizer efficiency.

Urea is a high concentration of fast nitrogen fertilizer containing 46% pure nitrogen. With high nitrogen efficiency characteristics, so by the farmers favorite. Top dressing is in the rapid growth stage of crop growth period, that is, vegetative growth and reproductive growth at the same time into a large number of growth and development period, to crop a certain amount of quick-acting nitrogen or nitrogen and potassium fertilizers to meet the needs of high yield crops. At this time it is the crop nutrient demand, the root absorption efficiency is high, Urea the topdressing with nitrogen fertilizer utilization rate of up to 50% or more, the nutrients in the fertilizer can be a lot of rapid flowering fruit is the result of absorption and utilization, and timely into Yield. Therefore, for the fertilizer fertilizer varieties must have easy to dissolve and quick effect characteristics, and urea is often the preferred fertilizer for farmers as fertilizer, that it has a high nitrogen content and quick effect.

At present, most people directly engaged in agricultural production for urea "quick" understanding, often not comprehensive. Although urea is an organic small molecule nitrogen fertilizer, Urea dissolved quickly after the application of soil, but the crop can not directly absorb a lot of it. Because the urea into the soil after the urease involved in the decomposition of the role of conversion to ammonium nitrogen after the crop roots can be quickly and heavily absorbed. This also shows why the use of ammonium sulfate, Urea ammonium chloride and ammonium bicarbonate to do the fertilizer fertilizer is certainly faster than urea, they do not need to be directly converted to the use of conversion, is in line with the purpose and role of top dressing.

Since urea needs a transformation process can be a large number of crops can be absorbed, then the conversion takes a long time? The speed of conversion by what factors the impact of the use of urea for topdressing than other ammonium nitrogen fertilizer a few days ahead of scientific experiments have long proved In the general farmland, Urea when the soil moisture and pH were basically adapted to the normal growth of the crop, the soil temperature was the main influencing factor of the urea conversion rate, and the soil temperature was the most important factor The For example, in the early spring of winter wheat season, the temperature of 10 ℃, urea nitrogen into ammonium nitrogen need 7 to 10 days; local temperature rose to 20 ℃, spring corn cough bell top dressing, cotton Topdressing, wheat booting stage topdressing, Urea urea conversion to ammonium nitrogen about 5 days, while the local temperature rose to 25 ℃ after only 3 days.

As for the specific few days ahead of time, due to local conditions. The same is the spring and summer of the season, in the northeastern region of the soil temperature is very slow to take a few days, while the South China soil temperature is high, the application of urea corresponding 1 to 2 days in advance can be; the same area, Urea Lower than dry land, but also different treatment. In addition, in the summer with urea for topdressing, but also pay attention to timely casing or irrigation, to prevent a large number of ammonia volatiles will burn the leaves.