Effects of Micro-environmental Atmosphere on the Quality and Volatile Components of Blueberries under Controlled Freezing Point Storage

In order to clarify the effects of different gas microenvironments on the quality and volatile components of blueberry during controlled freezing point storage (−0.5±0.3 ℃), the changes of quality and volatile components of blueberries during 0~80 days under different gas microenvironments were studied using ‘Legacy’ blueberries as samples. The results showed that during the storage period, in the three different atmosphere control steps, the O₂ variation range was 15.4%~18.2%, 13.1%~15.9% and 6.1%~13.4%, and the CO₂ variation range was 2.2%~4.5%, 4.5%~8.8% and 8.8%~14.8%. Compared with the control, the microenvironmental gas regulation could delay the decrease of nutrient substances (V_C, anthocyanins and titratable acid) and hardness of blueberry fruits, maintained a low decay rate and a high fruit frost coverage index, and could also inhibit the production of aldehydes and promote the production of terpenoids. Among them, the gas microenvironment with O₂ content maintained at 6.1%~13.4% and CO₂ content maintained at 8.8%~14.8% has the best effect on blueberry storage, which was conducive to the long-term storage of blueberry fruits.