The per fruit mass ,the contents of solubke solid and the firmness in the canopy gradually descended from upper to lower,whereas the contents of titrable acidity increased.

• 同一树形树冠内果实单果质量、可溶性固形物含量、果实硬度等指标从树冠下部到上部逐渐增大，可滴定酸含量则逐渐减少；