果树综合管理中，果树施肥是丰产的基础，植保工作是优质的保证。为了提高产量及品质，每年都要进行多次。在果树施肥及打药当中，因用肥用药不当，果树肥害及药害时有发生，轻者灼伤根系及叶片果实，重者绝收，甚至死亡。在生产实践中，造成果树肥害的原因大致有以下几种情况? Fruit tree integrated management, fruit tree fertilization is the basis for high yield, plant protection is a guarantee of quality. To improve production and quality, many times a year. In the fruit tree fertilizing and fighting drugs, due to improper use of fertilizer, fruit tree fat injury and injury occur from time to time, the light burns roots and leaves of fruit, heavy and absolutely no income, and even death. In production practice, resulting in fruit tree fat roughly the following reasons?