复合肥是指同时含有氮磷钾三要素中的两种以上成分的肥料。“复合”两字来自英文compound,它的词义为复合的、化合的、混合的。因此复合肥应包括化学合成和机械混合的两类。 近十年来,世界上工业发达国家生产和施用高浓复(混)合肥料迅速发展,约占化 Compound fertilizer is a fertilizer that contains two or more of the three elements of NPK. The word “compound” comes from the English compound. Its meaning is compound, compound and mixed. Therefore compound fertilizer should include two types of chemical synthesis and mechanical mixing. Over the past decade, the world’s industrialized countries, the production and application of high concentrations of complex (mixed) Hefei material rapid development, accounting for about