苹果梨果实中矿质元素含量随季节的推移而呈现出一定的规律性变化 .N、P、K、Ca、Mg含量幼果期最高 ,随果实膨大而递减 ,果实成熟采收时降至最低 ;Fe、B含量随果实发育起伏变化较大 ,幼果期含量较高 ,7月末降至最低 ,以后随果实的发育又呈上升趋势 ;Zn、Mn含量变化较平稳 ,呈递减趋势 ,果实生长后期略有上升 .果实与叶片间在季节变化中Ca、Mn呈显著负相关 ,而P、K呈显著正相关 The content of mineral elements in apple and pear fruits showed some regular changes with the seasons.The content of N, P, K, Ca and Mg was the highest in young fruit and decreased with fruit enlargement, The contents of Fe and B changed greatly with the fluctuation of fruit development. The content of Fe and B was higher in young fruit and reached the lowest in late July, and then increased with the development of fruit. The content of Zn and Mn changed more smoothly and showed a decreasing trend. Slightly increased.The Ca and Mn in fruits and leaves were significantly negatively correlated with seasonal changes, while P and K were significantly and positively correlated