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问:什么是叶面肥?叶面施肥与土壤施肥相比都有哪些优点?答:叶面肥是喷洒在茎叶(主要是叶片)的表面,其养分能直接被吸收利用的肥料。与土壤施肥相比,叶面施肥具有养分吸收快、利用率较高、不受土壤干旱、渍涝和盐碱化等不利条件限制等优点。叶面肥特别适合于缺素矫正,由于喷施浓度可严格控制,喷施微肥不会像土壤施用微肥那样,因长期、过量施用而造成土壤污染。问:把尿素溶在水里,喷到叶面上就是叶面肥吗?哪些元素或物质适合于
Q: What is foliar fertilizer? What are the advantages of foliar fertilization compared with soil fertilization? A: Foliar fertilizer is sprayed on the surface of stems and leaves (mainly leaves), and its nutrients can be directly absorbed and used. Compared with the soil fertilization, foliar fertilization has the advantages of fast nutrient uptake, high utilization rate, freedom from soil drought, waterlogging and salinization and other unfavorable conditions. Foliar fertilizer is particularly suitable for the lack of correction, spraying concentration can be strictly controlled, spraying fertilizer will not be as micronized soil fertilizers, as a result of long-term, excessive application of soil pollution. Q: The urea dissolved in water, sprayed onto the foliage is foliar fertilizer? What elements or substances suitable