鸭梨果实采后在２０±１℃时，随着其后熟进程，ＡＣＣ含量和乙烯释放量急剧增加，分别于采后第１５天和第２１天达到峰值，同时伴随出现呼吸跃变．采后果实的果心组织不仅对ＣＯ＿２极为敏感，而且还对低氧敏感．两者导致组织伤害的症状相同，但集中表现的时间不同．ＣＯ＿２伤害多出现在贮藏前期，而低氧伤害则主要在贮藏中、后期出现．鸭梨果实气调贮藏的适宜气体组分为７％～１０％Ｏ＿２和０％Ｃ０＿２． At 20 ± 1 ℃ postharvest, the contents of ACC and ethylene increased sharply after harvesting, reaching the peak on the 15th and 21st days of postharvest, accompanied by the respiration. Fruiting tissue of postharvest fruit is not only sensitive to CO_2, but also to hypoxia. Symptoms that cause both tissue damage are the same, but the timing of concentration is different. CO_2 injury occurred in the early storage, and hypoxia injury mainly in the storage, the late appear. The suitable gas components of Yali pear were 7% -10% O2 and 0% C0_2.