Effects of temperatures and PE films on the quality of fresh sweet potato leaves during storage

Fresh Sweet potato leaves as the material, which was packaged by three different fresh films ( 0.05 mm PE films, 0.03 mm PE films, Microporous plastic films) , and stored at different temperature ( 0, 5, 10 ℃ and room temperature) .Relative conductivity, weight loss, flavonoids content, chlorophyll content, nitrite content and overall quality were tested on days 1, 3, 5, 7, 9, 11 d.The results showed that fresh sweet potato leaves under 10 ℃ combined with 0.05 mm plastic packaged had the best preservation effect.It delayed degradation of chlorophyll and flavonoids, maintained a significantly lower relative conductivity and weight loss, kept good sensory quality, and extended the storage life of fresh sweet potato leaves. Therefore, sweet potato leaves during the storage were recommended that 0.05 mm PE plastic bags wrap, stored at 10 ℃.