Abstract:

Agrocybe chaxingu Huang were stored in the packages with or without silicon gum film window in different controlled atmospheres (10% O2, 10% CO2, 80% N2 or 10% O2, 15% CO2 and 75% N2) at 3 ± 1℃. Then changes of gas composition in the packages, respiration rate, ascorbic acid content, total acid content, soluble solid content, conductivity and protein content were examined. The results showed that there are significant differences in all examined parameters between the packages with and without silicon gum film window. Compared with the package without silicon gum film window, the package with silicon gum film window are highly effective for quality preservation of stored mushrooms because silicon gum film window has good gas exchange ability to keep the gas compositions in the package relatively stable and avoid the occur of anaerobic respiration. Moreover, the initial gas concentration also has some effects on quality preservation of mushrooms during storage. In conclusion, with 10% O2, 10% CO2 and 80% N2 as the initial gas concentrations, the package with silicon gum film window can keep O2 concentration above 1.5% and CO2 concentration under 12.6% during the whole storage period, which are the optimal conditions for the storage of Agrocybe chaxingu Huang.

Key words: controlled atmosphere, silicon gum film window, Agrocybe chaxingu Huang, chemical and physiological change, storage