果树在生长发育过程中,铁是不可缺少的微量元素,它对叶绿素的合成具有重要的作用。果树缺铁,会影响叶绿素的合成而表现出“失绿症”。其主要症状是:初期叶色发黄,叶脉保持绿色,在新梢生长初期不太明显,后期幼叶黄化,严重时,枝叶自顶端向下逐级枯死,直接影响产量和果树的寿命。因而,对缺铁果树进行防治是非常必要的。 During the growth and development of fruit trees, iron is an indispensable trace element, which plays an important role in the synthesis of chlorophyll. Iron deficiency in fruit trees can affect chlorophyll synthesis and show “chlorosis”. The main symptoms are: the initial leaf color yellow, veins remain green, the early shoot growth is not obvious, the late young leaves yellowing, serious, the branches from the top down step by step, directly affect the yield and fruit life. Therefore, the prevention and treatment of iron deficiency fruit trees is very necessary.