通过测定红富士苹果运输损伤后的生理生化变化，发现机械损伤不仅使果实表面出现褐色斑块，果实呼吸强度迅速增加，而且细胞内促进活性氧产生的脂氧合酶的活性增加，果皮增加的幅度高于果肉；具有消除自由基作用的SOD和CAT的活性在损伤后也突然升高，但在损伤后第2～6天活性逐渐下降，同时，损伤后POD活性、MDA含量以及膜透性都有显著的增加，说明机械损伤破坏了膜的完整性、促进了脂质过氧化的产生，导致衰老性状的提前出现。本试验从理论上进一步证明减少运输中的机械损伤对延长贮藏寿命、提高果品品质具有重要的意义。 By measuring the physiological and biochemical changes of Red Fuji apple after transport injury, it was found that the mechanical damage not only caused the brown patches on the surface of the fruit, but also rapidly increased the respiration intensity of the fruit and increased the activity of the lipoxygenase produced by reactive oxygen species in the cells. The activity of SOD and CAT with the function of eliminating free radicals also increased suddenly after injury, but decreased gradually from the 2nd to 6th day after injury, while the activities of POD, the content of MDA and the permeability of membrane after injury All showed a significant increase, indicating that mechanical damage destroyed the integrity of the membrane, promoting the production of lipid peroxidation, resulting in the advance of aging traits. This experiment further theoretically proves that reducing the mechanical damage in transportation is of great significance to prolong the storage life and improve the quality of fruit.