柑果实受内伤后，贮藏中的呼吸强度和果皮果肉ＳＯＤ活性呈上升趋势，用６ｋｇ压伤的比４５ｋｇ压伤的上升更明显。这种现象是果实受伤后产生的自我保卫反应。但伤后４０天和６５天左右呼吸强度和ＳＯＤ又迅速下降，接近或低于健康果水平。内伤果细胞膜透性增加，伤害越重，透性越大，说明内伤果实加速衰老，贮藏中其营养价值和食用品质下降更快。 Citrus fruit injury, the storage of respiratory intensity and pericarp SOD activity of the pulp upward trend, with 6kg crushed injury more than 4  5kg increased more significantly. This phenomenon is self-defending response after fruit injury. However, 40 days and 65 days after injury, respiratory intensity and SOD decreased rapidly, close to or below the level of healthy fruit. Injury cell membrane permeability increases, the more serious injury, the greater the permeability, indicating accelerated internal aging fruit injury, storage of its nutritional value and eating quality declines faster.