鸭梨果实采后生理及其气调贮藏气体组分研究

Studyon Postharvest Physliology and O_2,CO_2 Composition for CA Storage of‘Ya’pear Fruit

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．

Respiration climacteric peak of‘Ya’ pear fruit(Pyrus bretschneideri Rehd.)occurs following increase inACC and ethylene synthesis,and marked decline in firmness happened at 20 ℃ after fruit harvest.‘Ya’,pearfruit is very sensitive to CO_2 during storage;Low-O_2 injury is observed when O_2 was 5%and CO_2 was 0%aswell. CO_2 injury appears in earlier period of storage and low-O_z injury occurs in mid -or later period of storage。The suitable O_2,CO_2 composition for CA storage of ‘Ya’pear fruit is 7%～10%O_2 and 0%CO_2, respectively.