纸袋透气度对石榴质量及其安全性的影响

The Effect of the Permeability of Paperbag on the Quality and Safety of Pomegranate

关键词:  石榴  纸袋  质量  安全性

Key Words:pomegranate  paperbag  quality  safety

摘要:以陕西临潼石榴为研究对象，选择3种具有代表性的纸袋,研究了纸袋质量对石榴质量及其安全性的影响。结果表明，纸袋的透气度对石榴质量有显著影响。透气度越大，石榴果实的单果越重，裂果率越小；果汁中还原糖的含量越高，而可滴定酸的含量越低。但纸袋透气度越大，果汁重金属（Pb、As、Hg）的含量、农药残留（氯氰菊酯）量越高，安全性越差。纸袋的透气度过大，纸袋抗张指数、耐破度、撕裂指数下降，达不到套袋的目的，故选择适当透气度的石榴纸袋，是实施石榴套袋栽培技术的关键。

Abstract:Three kinds of representational paperbags were used to study the effect of permeability of paperbag on the quality and safety of the pomegranates which are growing in Lintong city, Shaanxi province. The results showed that permeability of paperbag effects the quality and safety of pomegranate remarkably. The permeability of paperbag is greater, the weight of pomegranate fruit is heavier, the cracking rate of pomegranate is lower. The reducing sugar in pomegranate juice is lower, and the titratable acid content is higher. The safety of pomegranate is worser, if the content of heavy metal (Pb, As, Hg) and residual pesticides (Cypermethrin) are higher. However, if the permeability of paperbag is too high, the tensile index, bursting and tear index of paperbag decrease, which can not reach the purpose of bagging. So choosing appropriate permeability of paperbag is the key in the pomegranate bagging cultivation.