EFFECT OF PRESSURE PRE-COOLING , OUTER PACKING AND COLD STORING ON QUALITY OF BROCCOLI

摘要

The effects of pressure pre-cooling（PC）and outer packing with the expanded polystyrene cases (EPS) and the corrugated paper boxes (CPB) on the quality of broccoli during 10 days storage at 0°C were studied. The results showed that the quality of broccoli that was pre-cooled by pressure pre-cooling equipment and then packed with expanded polystyrene case was better than that with corrugated paper box. During cold storage, the weight losses of broccoli increased gradually; the color of broccoli was almost unchanged; the total soluble solid and vitamin C contents decreased gradually; the chlorophyll content decreased in the earlier stage and then accumulated. The freshness was kept best with PC+EPS, not only in reducing the weight losses of broccoli, but also in reducing the losses of the total soluble solid and vitamin C contents.