由于果树长期生长在同一个土壤容积里,再加上果园多数建立在山地、丘陵地、河滩地、轻盐土地上,上质较差。因此,与大田作物相比,果树更易出现各种生理障碍症,如常见的缺铁黄叶病、缺锌小叶病、缺硼缩果病、缺钙苦痘病等。树体的正常生长发育需要16种 Due to the long-term growth of fruit trees in the same soil volume, coupled with the majority of orchards based on mountains, hills, beaches, light salt land, poor quality. Therefore, compared with field crops, fruit trees are more prone to a variety of physiological disorders, such as common iron deficiency leaf disease, zinc deficiency leaf disease, boron deficiency disease, calcium deficiency bitter pox disease. The normal growth and development of the tree need 16 species