The stiffness factor negatively correlated with SSC and the correlation coefficients were -0.903, -0.922 and -0.920 for Dangshan, Shuijing and Xue pears, respectively.

• 无损硬度系数与梨的可溶性固形物也有较好的负相关性，酥梨、水晶梨、雪梨的相关系数分别为-0.；903、-0