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目前,叶面肥的品种很多,但养分含量各有不同。根据作物的生理特点,选用适当的叶面肥,既能满足作物某个生长阶段对养分的需要,又能提高肥料利用率,从而达到增产、增质、增效的目的。一、根茎类作物巧施叶面肥的方法以块根块茎为主食对象的作物即为根茎类作物,如马铃薯、大蒜、甘薯、胡萝卜等。其生理特点是:全生育期对磷钾肥的需求多于氮肥,尤其是中后期对钾的需求更为敏感。因此这类作物,除基肥和苗期施氮肥外,应在中后期多施钾、磷肥,以满足作物根茎对养分的需求。喷施叶面肥可用1%～2%的过磷酸钙浸出液、0.1%～0.3%磷酸二氢钾水溶液、5%～10%草木灰浸泡过滤液或1%～2%氯化钾(硫酸钾)水溶液。如在后期
At present, many varieties of foliar fertilizer, but different nutrient content. According to the physiological characteristics of crops, the selection of appropriate foliar fertilizer, not only to meet the needs of a certain crop growth stage of nutrients, but also improve fertilizer utilization, so as to achieve the purpose of increasing production, increasing quality and increasing efficiency. First, the method of clever crop foliar fertilizer Take tuber root tuber as staple food crops is rhizome crop, such as potato, garlic, sweet potato, carrot and so on. Its physiological characteristics are: the whole growth period of phosphorus and potassium fertilizer demand more than nitrogen, especially in the late demand for potassium is more sensitive. Therefore, this type of crop, in addition to base fertilizer and seedling nitrogen fertilizer, should be more in the late potassium, phosphate fertilizer to meet crop roots and nutrients to the needs. Spraying foliar fertilizer available 1% to 2% of superphosphate leaching solution, 0.1% to 0.3% potassium dihydrogen phosphate solution, 5% to 10% soaking ash or 1% to 2% potassium chloride (potassium sulfate) Aqueous solution. As in the later