Fresh-keeping Effect of Complex Antistaling Agent Consisted of Chitosan and Extraction from Ginger and Garlic on Red Citrus

ObjectiveThe study was constructed to empolder new ways for storage and preservation of red citrus.MethodsWith red citrus as materials,the fresh-keeping effect of compound paint film liquid of chitosan and extraction from ginger and garlic with different matching on fruits at room temperature was studied by using 8 kinds of paint film liquids included chitosan at 0.5 %~2 % with or without extraction from ginger and garlic.Result Rot rate after 50 days in treatment 3(1.5% chitosan with extraction from ginger and garlic) was lowest,being 5.9 %.The depression effects on fruit weight loss rate during storage by T3 and T4(1.5 % and 2 % chitosan with extraction from ginger and garlic),and T7 and T8(1.5 % and 2 % chitosan without extraction from ginger and garlic) were more obvious,with the fruit weight loss rate being 11.1 %,11.3 %,12 % and 10.9 % resp.T3 had littlest effect on fruit total acid content and Vc content.Conclusion Painting fruits with T3 compound paint film liquid had best fresh-keeping effect.It restrained increment of fruits rot rate and weight loss rate significantly,delayed decrement of fruit total acid and Vc contents and its effect was obviously better than that with other treatments.