在营养元素失调导致的落叶果树叶片失绿病中,以缺铁引起最为常见,苹果树则是发生最普遍,最严重的树种之一。我国华北、西北、黄河故道以及渤海湾等苹果主产区都有病因存在。罹病树轻者,树势衰弱、果品产量和质量下降;严重者,不仅绝产,甚至整株死亡。因此,围绕失绿病的苹果铁素? Among the chlorosis diseases of deciduous fruit leaves caused by the imbalance of nutrient elements, iron deficiency is the most common cause, and apple trees are one of the most common and serious tree species. China’s North China, Northwest China, the Yellow River and other major producing areas such as Apple have the main producing areas exist. Sick trees, trees weak, fruit production and quality decline; in severe cases, not only the absolute death, or even whole plant died. Therefore, around the chlorosis of apple ferrite?