What is the difference between large-particle urea and small-particle urea? Urea is a common fertilizer, and its development has been concerned by all parties. At present, urea has large particles and small particles. Generally, the particle diameter is more than 2 mm. The above urea is called large granular urea. The difference in particle size is derived from the difference between the granulation process and the equipment after the urea is produced in the factory. The details of the large particle urea and the current use are described in detail.
Large granular urea has low content of low-grain urea dust, high compressive strength, good fluidity, can be transported in bulk, is not easy to be broken and agglomerated, and is suitable for mechanized fertilization. At the same time, the large-particle urea is slightly slower to dissolve in the soil, and can be used in paddy fields, especially in rice cultivation, to sink into deeper soils, reducing the loss of volatilization, and the low-granule urea biuret content is low, which is beneficial to crops. However, it should be noted that the application of large urea on rice may increase the risk of nitrate leaching.
At present, large granular urea as a base fertilizer and deep application of rice has significant agricultural and economic advantages, which can improve the efficiency of nitrogen fertilizer utilization. Deep application of large granular urea in rice fields can reduce greenhouse gas N2O emissions. The direct application of large granular urea is not much. The main reason is the recognition problem, the deviation of fertilization target and the misleading of fertilization methods. From the perspective of development, large granular urea in crop yield, nutrient efficiency and control agriculture The role of non-point source pollution also needs market attention.
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