Effect of different package methods on quality changes of Qula during storage

This research was conducted to explore the optimal package methods for Qula and reduce the economic losses caused by Qula quality deterioration during storage. Qula was stored in four types of packages, such as dark storages with or without vacuum and non- dark storages with or without vacuum.The samples were stored for6 months, then the sensory quality, titratable acidity, POV, TBARS were measured in every month during the storage.The results showed that POV of Qula in non- dark storage without vacuum package significantly increased than dark storage with vacuum, dark storage without vacuum and non- dark storage with vacuum for 0.54, 0.28, 0.11 g /100g ( p < 0.01) , and sensory quality of Qula in non- dark storage without vacuum package significantly lower than other ways after stored for 6 months. The study showed that dark storage with vacuum, dark storage without vacuum and non- dark storage with vacuum could effectively delay the quality deteriorated of Qula, furthermore there was no significance between packages of dark storage without vacuum and non- dark storage with vacuum.Considering of the limited condition in pastoral and the economic factors, package of dark storage without vacuum is more suitable for the application in the pastoral areas.