We sprayed on the13-year-old ‘Gala’ and ‘Fuji’ grafted Malus hupehensis with zincsulfate and sugar alcohol zinc at four developmental stages (before bud break, at three weeksafter bloom, at the termination of spring shoots, during the fruit expansion). The appleorchard (116°50’E,36°14’N) was located in Chaoquan Town, Shandong Province. Theeffects of zinc sprays before bud break on the growth and development of flowers and leaveswas studied. We also determined the leaf and fruit zinc and net photosynthetic r...