在果树栽培中,一般认为果树黄叶是由缺肥引起的。其中所缺肥料主要是氮肥、镁肥和铁肥。但在雨水多、果树旺长的年份,树体主枝角度不开张、枝量过大,也很容易导致枝条旺长,出现综合性营养生长过旺,致使部分果树因营养缺乏而黄化。但在不缺肥时,果树叶片有时也会发黄。此时果树 In fruit tree cultivation, it is generally believed that yellow leaves of fruit trees are caused by lack of fat. The lack of fertilizer which is mainly nitrogen fertilizer, magnesium fertilizer and iron fertilizer. However, in the rainy days and the vigorous growth of fruit trees, the main branch of the tree is not open and the branches are too large. It is also very easy to cause the branches to become prosperous, resulting in the overgrowth of the comprehensive vegetative growth, resulting in yellowing of some fruit trees due to lack of nutrition. But when not lacking in fertilizer, fruit leaves sometimes yellow. Fruit tree at this time