秦冠和红富士苹果对机械损伤的敏感性分析

Sensitivity Analysis of Mechanical Damage on Qinguan and Red Fuji Apple

为加深对苹果机械损伤的认识,更好地解决苹果采后机械损伤难题,通过人工模拟试验方法,比较60 cm高度跌落碰撞后秦冠和红富士苹果的损伤程度,以及机械损伤对两种苹果贮藏品质和生理反应的影响。试验结果表明:在同一碰撞条件下,红富士比秦冠苹果更容易产生机械伤,贮藏过程中,伤口面积和深度不断增加,红富士苹果伤口增幅大于秦冠;红富士和秦冠机械伤果在贮藏过程中呼吸强度均增大,红富士果实呼吸峰提前,秦冠的呼吸峰没有提前,而红富士果实的硬度、可滴定酸含量、失重率降幅均小于秦冠,两者可溶性固形物含量变化几乎没有差异。红富士比秦冠苹果对机械损伤更为敏感,而相同的机械损伤对秦冠苹果的生理反应和贮藏品质影响较红富士更大。

In order to deepen the understanding of mechanical damage of apples and better resolve the mechamcal injury problems of postharvest apples, the artificial simulation test method were used to research 60 cm height drop colli-sion. The injury degree of Qinguan and Red Fuji apple were compared, the influence of physiological responses and storage quality of Red Fuji apple and Qinguan apple were studied. The results showed that： at the same collision condi-tion, Red Fuji apple was easier to produce mechanical injury than Qinguan apple. The wound area and depth were in-creasing during storage. The wound increased of Red Fuji apple was bigger than Qinguan. The respiration intensity of this two variety were all increased during storage. The respiration peak of Red Fuji apple was approch, there was no advance the breathing Qinguan peak, but the Red Fuji firmness, titratable acid content, the weight loss rate of decline was less than Qinguan and both soluble changes in the solids content was almost no difference. Therefore, the Red Fuji apple was more sensitive to mechanical damage than Qinguan apple, but at the same condition, Qinguan had more mechanical damage of the physiological responses and storage quality.