Studies On The Quality Characteristics And Fresh Keeping Technologies Of Post-harvest Pleurotus Nebrodensis And Agaricus Bisporus

Agaricus bisporus and Pleurotus nebrodensis are both edible mushrooms which have highly nutritious and good taste, they also have good market value and development future. This paper used electron beam irradiation and MAP(modified atmosphere package) treatment, then stored at low temperature , studied the quality of Agaricus bisporus and Pleurotus nebrodensis in order to explore the suitable storage and fresh keeping technologies.1.Fruit bodis of Agaricus bisporus were packaged by different modified atmosphere package (MAP) films, and the storage quality of different MAP from good to bad were respectively PVC12 (polyvinylchloride 12μm) film, PVC11 (polyvinylchloride 11μm) film, PE10 (Polyethylene 10μm) film,PE11 (Polyethylene 11μm) film,PMP( poly methyl acrylicventilate 13μm) film, PVC12 film were the best MAP film. The fruit body packaged by PVC12 film retained higher water-soluble vitamins, total amino acids and unsaturated fatty acid content, exhibited less water-soluble sugar content. At the same time the sense quality were better and the storage time were longer.2.Used different dosage of 1.0, 2.0, 3.0 and 4.0kGy electron beam irradiated the fruit body of Agaricus bisporus and stored them in 4℃. The results showed that the 2.0kGy dosage irradiation treatment could extend the storage period, although caused a small amount loss of vitamins, amino acids and soluble sugar, in the latter storage (4d -13d) retained the highest content of vitamin , unsaturated fatty acids and amino acids, the lowest soluble sugar and the best quality of appearance. The storage time of 4.0kGy dosage irradiation treatment was shortest. Those indicated too higher dosage level (≥4.0kGy) of irradiation could accelerate the nutrition degradation and rotting. Electron beam irradiation on Agaricus bisporus could decreased the enzymes activity, reduced the protein degrading and browning of the fruit body, and we think this is the main reason why irradiation treatment could prolong the storage time.3.Used different dosage of 1.0,1.5,3.0 and 4.5kGy electron beam irradiation irradiated the fruit body of Pleurotus nebrodensisand stored them in 4℃. The results showed that although the 3.0kGy dosage irradiation treatment caused a small amount loss of vitamins, amino acids and total sugar, in the latter storage(5-20d) retained the highest content of vitamin , total sugar and amino acids, and the best quality of appearance. the 3.0kGy dosage irradiation treatment could extend the storage period.The storage time of 4.5kGy dosage irradiation treatment was shortest. Those indicated too higher dosage level (≥4.5kGy) of irradiation could accelerate the nutrition degradation and decay. Electron beam irradiation on Pleurotus nebrodensis could decreased the enzymes activity, inhibited the metabolism of the fruit body, and we think this is the main reason why irradiation treatment could prolong the storage time.