Study On The Preservation Of Special Vegetables And Fruits With Modified Atmosphere Packaging

According to the analysis of and research of MAP on fruits and vegetables, we studied the preservation mechanism of the fresh-cut bamboo shoots and effects of Chinese Bayberry and peach using modified atmosphere packaging, which would supply the theoretical and practical gist for the industrialization of MAP on fruits and vegetables.The best conditions to preserve the fresh-cut bamboo shoots were founded as 0.04mmPE films, 2% O2, 5% CO2 when simple model estimate and orthogonal tests were used. MAP could inhibit the browning and retard the decomposition of total sugar, reducing sugar, and protein, which maintained the fresh-cut bamboo shoots' quality and prolonged their shelf-life at least 6 days. MAP also inhibited the MDA contents and POD, PAL activities, however it had no effect on polyphenol contents and PPO activity. MAP also maintained PG, cellulase activity and pectin contents, and retarded composition of cellulose and lignin which promoting lignification of bamboo shoots.The best conditions to preserve the Chinese Bayberry were founded as 0.04mmPE films, 10% O2, 10% CO2 when one factor and orthogonal tests were used. Though MAP could not inhibit the growth of moulds, it could reduce the rot loss of Chinese Bayberry. It retarded decomposing of total sugar, total acid, Vc and anthocyanin, and extended the shelf life to 20 days.MAP could significantly inhibit weight loss, and retard browning and softening of peach. The effect of 5% O2+5% C02 was better than spontaneity MAP. The results also showed that the effect of 5% O2+5% CO2 was better than 1% O2+ 10%CO2, and the effect of 0.03mm PE films was better than 0.04mm and 0.05m PE films.