四季豆贮藏保鲜技术的研究

研究四季豆在低温及PVC袋包装条件下的贮藏效果,测定其在贮藏过程中呼吸强度、水分含量、维生素C、还原糖、叶绿素含量的变化以及PPO、POD活性的变化,并且分析锈斑生成原因。结果显示,四季豆为呼吸跃变型蔬菜,9℃为四季豆适宜贮藏温度,随着贮藏时间的延长,水分、VC、还原糖、叶绿素的含量下降,PPO、POD活性上升;锈斑的形成与CO2有关;在35天之内,四季豆商品率可保持在92%左右。

Study on Storage Technology of Freshness Protection of Green Bean

It was devoted to study the effect of the storage under the condition of low temperature and packed by PVC bag .This paper determines the respiratory rate ,the moisture content,the vitamin C,the chlorophyll content, reduction Sugar and the activity of PPO and POD, and analyzes the reason of rusty. The results showed that 9~C is the appropriate temperature for storage of Green Bean. Bean is the respiration climacteric vegetable. As time goes on, the contents of moisture, the vitamin C, reduction Sugar and chlorophyll were descented, the activity of PPO and POD were increased, the format of rusty have relation with carbon dioxide. The commodity rate of green bean may keep at 92%within 35 days.