بررسی تاثیر دما، نوع بسته بندی و اتمسفر اصلاح شده بر خصوصیات کیفی گوجه فرنگی

Freshness of vegetables and fruits in the short term and long term is one of the important challenges of postharvest process. In this research, the effects of packaging type, modified atmosphere and temperature on the post harvest quality of tomato were investigated during storage. The treatments were considered as modified atmosphere packaging (passive and active) with two gas combinations (4%O₂+8%CO₂+88%N₂ and 8%O₂+4%CO₂+88%N₂), two types of package (polypropylene and polyethylene films) and two storage temperatures (4±1) and (20±2)ºC. The effects of above mentioned treatments were investigated using Completely Randomized Design with three replicates on the weight loss, firmness, soluble solids, titratable acidity and pH of tomato during 20 days storage. Analysis of variance results indicated that the effects of all treatments on the measured factors were significant (p<0.01). Tomatoes stored in polypropylene due to less thickness and more O₂ permeability preserved the quality of tomatoes better than those of polyethylene film.Also,storage temperature of(4±1)ºC maintained the quality of tomato much better than (20±2)ºCdue to slow down metabolic activities. The first gas combination (4%O₂+8%CO₂+88%N₂) was suitable due to higher CO₂ and respiration reduction. Tomatoes stored in polypropylene film and first gas combination at (4±1)ºC had the best quality after 20 days storage. In general, storage of products in the packages with modified atmosphere resulted in preserving quality and shelf life.