作物施用复合肥料,已被广大群众接受,而且在逐步受到欢迎,但在施用过程中,应该做到“三要”。一、要合理选择只有根据不同的作物选用适宜的复合肥,才能充分发挥其肥效。稻、麦及玉米等禾谷类作物需要的氮肥较多,可选用氮磷复合肥;豆科作物能固定空 The application of compound fertilizers to crops has been accepted by the general public and is gradually gaining popularity. However, during the application process, “three musts” should be achieved. First, we must make a reasonable choice Only according to different crops to choose appropriate fertilizer, in order to give full play to its fertilizer effect. Rice, wheat and corn and other cereal crops need more nitrogen, nitrogen and phosphorus fertilizer can be used; leguminous crops can be fixed empty