|The experiment using 2-year-old potted Fuji (Malus domestica cv.Fuji) and flourishing period apple trees in the field as main materials was carried out in Shandong Agricultural university and Chaoquan apple orchard of Feicheng from 2007 to 2010. It mainly studied the effects of different zinc levels on growth development of apple trees and the rhythm of zinc and other micronutrients absorption and distribution in different organs, exploring the key factors and sensitive developmental period of zinc...