温度和保鲜膜对红薯叶贮藏品质的影响

以红薯叶为试材,在不同贮藏温度(0、5、10℃、室温)和不同PE保鲜膜(0.05、0.03 mm、微孔)下,测定1,3,5,7,9,11 d的相对电导率、失重率、黄酮含量、叶绿素含量、亚硝酸盐含量,并结合红薯叶感官品质的变化研究了温度和保鲜膜对红薯叶保鲜效果的影响。结果表明:10℃下贮藏结合0.05 mm保鲜膜包装对采后红薯叶起到较好的保鲜效果,可以减缓红薯叶的叶绿素和黄酮的分解,抑制相对电导率和失重率的升高,保持红薯叶较好的感官品质,有效延长货架期。因此建议红薯叶贮藏过程中用0.05 mm PE保鲜膜包装,贮藏于10℃。 

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 ℃.