Urea contains 46% nitrogen, which is the most commonly used high-quality nitrogen fertilizer in production. However, the utilization rate of urea in soil is usually only 45% to 50%. So, how to increase the utilization of urea?
One, deep urea
Whether as a base fertilizer or as a top-dressing fertilizer, the soil should be deeply applied and the depth of fertilizer application should be 10-12 cm. The deep application of urea can significantly increase the utilization rate. According to the test, urea meter applied or shallow application 2-3 cm, utilization rate is only 30%; fertilization depth 5 cm, utilization rate is 45%; deep application 10-20 cm, utilization rate can reach 65%.
Second, early application of urea
Ammonium-based nitrogen fertilizer can not be directly absorbed and utilized by crops after being applied to the soil, and it needs to be converted into ammonium nitrogen under the action of urease in the soil in order to be absorbed by the root system. Late application is not only unfavorable to the exertion of fertilizer effect, but also may cause late-maturing crops.
Third, spray urea
The small size of the molecule, which is easily absorbed by the leaves, is the best fertilizer for foliar sprays. Foliage spray is highly targeted, fast in absorption rate, free from influence of soil environmental factors, high nutrient utilization rate, low fertilization, and significant yield increase effect, especially in poor soil environment, excessive water or drought, soil over-acid or over When alkali causes the absorption of roots to be impeded and crops urgently need nitrogen nutrients and the root activity of crops declines during the later period of growth, the foliar spraying can make up for the lack of root absorption.
Fourth, mixed urea
Urea combined with organic manure, phosphorus and potash fertilizers and trace element fertilizers can maintain soil nutrient balance, maximize nutrient utilization and play a role in fertilizer production.
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