Effect of composite drying methods on the quality of dried Agrocybe aegerita
Eeffects of different drying methods on the quality of Agrocybe Aegerita was studied. The fresh Agrocybe aegerita were dried sequentially using vacuum drying and freezing drying after being partly removed moisture by airflow drying. Effects on sensory quality, colour, rehydration ratio and Vc content of dried Agrocybe aegerita were analyzed and compared. The results showed that the sample of freeze drying was the best one on exterior quality, chromatic aberration and rehydration ratio, and the next one was the sample of airflow-freeze composite drying, those contraction was less than that of the airflow drying, vacuum drying and its composite drying, the browning and contraction of the vacuum-dryin samples was the most serions; On the contrary, the samples of vacuum drying and its composite dryin were better on fragrance than others, the flavor of freeze-drying sample was very light. The Vccontent o each sample of several drying methods was all so significantly difference between them, that of freezin drying was the highest, followed by the product of airflow-freezing composite drying, airflow dryin sample was the lowest.