The difference between coated urea and ordinary urea BY:Cherry

1.The main difference between coated urea and ordinary urea After ordinary urea is applied to the soil, due to its fast dissolution rate, nutrients are easily lost with water, resulting in short-term fertilizer effect and difficulty for crops to fully absorb. This not only wastes fertilizer resources, but also may pollute the environment. Coated urea, on the other hand, significantly slows down the release rate of nutrients in the soil through the control of the outer coating, so that nutrients can be evenly supplied throughout the entire growth cycle of the crop. This slow-release characteristic not only improves the fertilizer efficiency, but also reduces the frequency of fertilization, simplifies the fertilization operation, and thus reduces labor costs. 

2.The coating principle of coated urea The coating principle of coated urea mainly involves the characteristics of the coating material and the diffusion process of urea molecules. The coating material is usually a special polymer with permeability and stability. It can form a uniform coating layer, delay the contact between urea and the external environment, thereby slowing down the dissolution and release rate of urea. Under the permeability of the coating material, urea molecules gradually diffuse to the surface of the coating and escape through micropores or permeation channels. This diffusion process is affected by factors such as the permeability and thickness of the coating material, as well as the ambient temperature and humidity. Therefore, coated urea can continuously release nutrients within a certain period of time to meet the long-term needs of crops. 

3.Coating materials of coated urea Coated urea mainly uses high molecular polymers as coating materials, such as polyolefins, polyesters, etc. Polyolefin materials, such as polyethylene (PE) and polypropylene (PP), have excellent water resistance, chemical resistance and processing performance, and can effectively slow down the release rate of urea. Polyester materials, such as polyethylene terephthalate (PET), have higher mechanical strength and heat resistance, and can better protect urea particles. These high molecular polymers not only have good film-forming properties, mechanical strength and chemical stability, but can also be tightly wrapped on the surface of urea particles to form a protective film, further improving the utilization rate of fertilizers.

4.Advantages of coated urea

1.Improve fertilizer efficiency: Control the nutrient release rate through coating, so that crops can evenly absorb nutrients throughout the growth period, thereby improving fertilizer utilization.

2.Reduce environmental pollution: Since the nutrient release rate is slowed down, the possibility of nutrient loss with water is reduced, and the risk of environmental pollution is reduced.

3.Simplify fertilization operation: The slow-release characteristics of coated urea make fertilization operation easier, and farmers do not need to fertilize frequently. 

4.Improve crop yield and quality: Stable nutrient supply helps crops grow healthily, thereby improving yield and quality. In summary, coated urea has many advantages over ordinary urea and is an important fertilizer choice in the development of modern agriculture. Its unique coating technology and raw material selection not only improve fertilizer efficiency, but also reduce the risk of environmental pollution, bringing significant benefits to agricultural production. 

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