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缓释肥料又称长效肥料,它具有缓溶解、缓释放,不挥发,难淋溶,利用率高的特点。同时由于减少了肥分的流失,可避免或减少对水体的污染,减缓水体的富营养化过程,具环境效益和社会效益。 随测土配方施肥技术的推广应用,对优化肥料结构,促进增产增收起较大作用,目前由于生产厂普遍采用干粉混合造粒工艺,总养分含量低。若以尿素为N源,由于尿素粉碎后的强烈吸湿性,使产品的物理性状恶化,控制尿素的量,总养分也低于30％,若通过化学合成和物理混合的方式,也可制得高浓肥。
Slow-release fertilizer, also known as long-acting fertilizer, it has a slow dissolving, slow release, non-volatile, difficult to leaching, high utilization rate. At the same time, due to the reduction of the loss of fertilizer, the pollution to the water body can be avoided or reduced, and the eutrophication process of the water body can be slowed down with environmental and social benefits. With the popularization and application of the technology of soil testing and formula fertilization, it plays a significant role in optimizing the structure of fertilizers and promoting the increase of production and income. At present, due to the dry powder mixing granulation process commonly used in the production plants, the total nutrient content is low. If urea is N source, due to the strong hygroscopicity after urea crushing, the physical properties of the product are deteriorated, the amount of urea is controlled and the total nutrient is less than 30%. If the chemical synthesis and physical mixing are adopted, High concentrated fertilizer.