【摘要】 观察了干燥、冷却和储存阶段玉米应力裂纹的生成和发展过程。结果显示，玉米应力裂纹生成在籽粒侧面的冠部，随时间的推移向脐部发展。单一裂纹的发展趋势是星状斑点－短裂纹－长裂纹。裂纹数量的发展趋势是单裂纹－双裂纹－龟裂纹。裂纹籽粒中，侧面有裂纹的占很大比例，正面和反面裂纹较少，出现正面及反面裂纹时裂纹已发展到龟裂阶段。总裂纹中大部分是冷后短暂的储存阶段生成和发展的裂纹更多还原

【Abstract】 The formation and development of stress cracks of corn in the stages of drying,cooling and storing were observed respectively. Cracks originated on the crown of corn flank as a white asterisk spot,and then expanded to short crack, and to long crack. The numbers of cracks developed from single to double, to checked. Cracks on flanks were more than that on the front and the back respectively. When the cracks on the front and back formed,the state of cracks in kernels was in checked. Cracks that formed and developed in a short period of storing after drying were more than other stages.更多还原