果树的正常生长需要多种营养元素的正常供应,如果某种元素供应不足,就会引起果实、叶片或其它器官发生病态,通常称为缺素症。果树上最常见的缺素症有以下几种: 小叶病新生的叶片变得很小,很窄,新梢也变短,以致小叶成簇生长。叶 The normal growth of fruit trees requires the normal supply of multiple nutrients. If insufficient supply of one element results in the morbidity of fruit, leaves or other organs, often called deficiency. The most common deficiency in fruit trees are as follows: Leaflets Newborn leaves become very small, narrow, shoots also become shorter, so that leaflet clusters grow. leaf