果树肥害,一般是指因施肥不当而使树体某些部位发生灼伤或损害,影响正常生长的现象。一、发生肥害的原因 1.是施肥方法不当,施肥区域过于集中或肥料直接接触根系,造成树根灼伤;叶面喷肥,肥液浓度过高,或喷布时间不当,如炎热天气中午喷布,致使叶片焦灼干枯。2.是施肥量过大,集中施入碳酸氢氨、氨水等氮素化 Fruit tree fat, generally refers to improper fertilization and some parts of the tree burns or damage, affecting the normal growth of the phenomenon. First, the reasons for the occurrence of fatal fertilizer 1 is improper fertilization, fertilization area is too concentrated or fertilizer in direct contact with the roots, resulting in root burns; foliar spray, fertilizer concentration is too high, or improper spraying time, such as hot weather at noon Spray, causing the leaves anxious dry. 2 is the amount of fertilizer is too large, concentrated into the bicarbonate ammonia, ammonia and other nitrogen