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作物吸收养分可通过二条途径:一是根系吸收,二是叶面吸收。叶面施肥又称根外施(追)肥或叶面喷肥,作物除了通过根系吸收养分外,叶片也能吸收养分,称为叶部营养或根外营养,能起到调节植物生长、补充所缺元素、防早衰和增加产量的作用。1叶面肥的种类和优缺点采取根外追肥可直接迅速地供给养分,避免养分被土壤吸附固定,提高了肥料利用率,且用量少,增产效果显著。一是叶面施肥肥料利用率高,其有效率是土壤施肥的6~20倍;二是避免了养分被土壤吸附、固定、淋溶、径
Crops can absorb nutrients through two ways: First, root absorption, and second, foliar absorption. Foliar fertilization, also known as the root (fertilizer) or foliar fertilizer, crops in addition to absorption of nutrients through the roots, the leaves can absorb nutrients, known as foliar nutrition or extracorporeal nutrition, can play a role in regulating plant growth, supplementation The lack of elements, anti-premature senility and increase the role of output. 1 types and advantages and disadvantages of foliar fertilizer to take root direct top-dressing can quickly and quickly supply nutrients to avoid soil nutrient adsorption and fixation, improve fertilizer utilization, and the amount of less significant increase yield. First, the foliar fertilization fertilizer utilization rate, the effective rate of soil fertilization 6 to 20 times; the second is to avoid nutrient absorption by the soil, fixed, leaching, diameter