Abstract: In order to evaluate the fresh-keeping effect of microvacuum storage on  Laiyang  pear, atmospheric storage was used as control to investigate physiological and biochemical changes of   Laiyang Chili   pear during microvacuum storage. The results showed that microvacuum storage significantly lowered the respiration intensity of   Laiyang Chili  pear and inhibited the occurrence of the respiration peak, reduced the loss of water, resulted in a weight loss rate of smaller than 3%, and alleviated the decrease of soluble solid and titratable acid (TA) contents (P ＜ 0.05) but did not significantly inhibit the decrease of vitamin C content (P＞ 0.05). It could therefore be concluded that microvacuum storage notably attenuates the metabolic intensity of   Laiyang   pear, thus erecting satisfactory fresh-keeping effect.

Key words:  Laiyang , pear, micro-vacuum storage, physiologic and biochemical changes