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利用果树叶片对营养元素的吸收特性,采用叶面施肥,可及时满足果树对养分的需求,矫治缺素病状,改善树体营养,提高产量。近年来,由于能源危机及肥料生产成本的上涨,迫切需要最大限度地减少肥料施用而不减少其生产率。由于叶面施肥可克服矿质元素在土壤中淋溶、流失及固定等弊病,肥料利用率高,因而叶面施肥作为根外追肥的施用方式在国内外的应用越来越广泛。
The use of fruit tree leaves on the absorption of nutrients, the use of foliar fertilizer, fruit trees can meet the timely nutrient needs, correct deficiency disease, improve tree nutrition and increase production. In recent years there has been an urgent need to minimize the use of fertilizers without reducing their productivity due to the energy crisis and rising costs of fertilizer production. Because foliar fertilization can overcome the drawbacks of leaching, losing and fixing mineral elements in soil, the utilization rate of fertilizer is high, so the application of foliar fertilization as top dressing is more and more widely at home and abroad.