Brief introduction of urea formaldehyde fertilizer
Urea formaldehyde is a product formed by the reaction of urea and high purity formaldehyde under specific conditions, which is filtered and dried. It is characterized by high nitrogen content, high viscosity, prolonged nitrogen supply period, reduced leaching and volatilization, and improved utilization. 2 the nitrogen in urea formaldehyde has the function of slow release, the perfect combination of quick effect and long effect, the fertilizer effect is long-lasting, the number of use can be reduced, the utilization rate of nitrogen can reach 50%, and the cost is saved. Urea-formaldehyde compound fertilizer features: high particle strength, not easy to break, round and shiny particles, reduce agglomeration, no dust, pressure resistance, easy storage and transportation, conducive to mechanical fertilization.
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Irrigation of farmland, pay attention to four kinds of fertilizers, do not flush them.
The application method of flushing fertilizer with water is also called "flushing fertilization". Generally, it is a kind of topdressing to provide supplementary nutrition during the period of rapid crop growth. since it is supplementary fertilization, it can not replace the main fertilization methods such as base fertilizer. But because this method is both convenient and quick, it is used in vegetable fields and planting cash crops and special foods.
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Potassium chloride is suitable for use with alkaline fertilizers
Potassium oxide is a physiological acid fertilizer, long-term application in the soil should pay attention to lime and other alkaline fertilizers to prevent soil acidification, the most suitable in calcareous, alkaline soil application. Potassium chloride can not be applied to saline soil, which will aggravate salt damage. Potassium chloride contains chlorine, which is related to crop quality. Currently...
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