1　专用肥的配方设计内容因土壤因作物设计配方是开发专用肥的关键 ,一个完整的专用肥配方应具备以下内容 :(1 )　提供作物需要的养分含量、比例和形态 ,考虑是否需配入中、微量元素。(2 )　若开发有特殊功效的专用肥 ,可将化肥与农药、座果剂、增效剂、除草剂等按照一定比例设 1 special fertilizer formula design content due to crop design formula for the development of fertilizer is the key to a dedicated fertilizer formula should have the following elements: (1) the crop needs nutrients, the proportion and morphology, to consider whether it needs to be allocated Medium and trace elements. (2) If special fertilizers with special effects are to be developed, chemical fertilizers and pesticides, fruit setters, synergists, herbicides and the like may be provided in a certain ratio