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给农作物施肥,不是随随便便把各种肥料施到土里,而应根据作物的需肥规律进行合理施肥,才能达到节省肥料、降低成本、增加产量之目的。 1.不同作物需肥特性不同 植物生长过程中需要10多种营养元素,其中需要量最大的是氮、磷、钾。不同植物对各种养分的需要量是不同的,如薯类作物需要钾肥较多,需要氮肥磷肥却较少。红薯吸收氮、磷、钾的比例是1:0.5:1.7,
Fertilization of crops, not casually put a variety of fertilizers applied to the soil, but should be based on crop fertilization rules of rational fertilization in order to achieve the purpose of saving fertilizer, reduce costs and increase production. 1. Different crops need fertilizer characteristics Different plants need more than 10 kinds of nutrients during growth, of which the greatest need is nitrogen, phosphorus and potassium. Different plants need different amounts of nutrients, such as potato crops need more potassium, nitrogen fertilizer need less. Sweet potato to absorb nitrogen, phosphorus and potassium ratio is 1: 0.5: 1.7,