中文摘要：

以＂辽核2号＂鲜食核桃为试材,采用Thn-PE11（11μm）、PE30（30μm）、PE50（50μm）和Thk-PE90（90μm）4种MA包装后于（0±0.5）℃下贮藏,定期转入7℃货架期贮藏7d,以6μm的普通薄膜包装为CK,监测各包装袋内气体成分、核仁品质及内源激素含量的变化。结果表明：各MA包装处理均具有提高CO2浓度和降低O2浓度的气调能力;4种包装下鲜核仁的酸价、过氧化值和羰基价均极显著低于CK,其中以PE30和PE50包装最低;PE30和PE50包装核桃的粗蛋白和脂肪含量较高;同时,4种MA包装降低了鲜食核桃脱落酸（abscisic acid,ABA）的含量,显著维持了其贮藏后期较高的赤霉酸（gibberellic acid,GA）与玉米素核苷（zeatin riboside,ZR）的含量。综合考虑各指标变化及成本因素,确定PE30为脱青皮鲜食核桃适宜的MA包装。

英文摘要：

Taking‘Liaohe 2＇fresh walnuts as test materials,the changes of gas concentrations,kernel quality and the endogenous hormones concentrations of‘Liaohe 2＇fresh walnuts were regularly monitored after storing at（0±0.5）℃and a further 7days at 7℃.These fresh walnuts were packed in Thn-PE11（11μm）,PE30（30μm）,PE50（50μm）and Thk-PE90（90μm）packages（6μm plastic films as control）.The results showed that all MA packages reduced the concentration of O2 and increased that of CO2.Acidfi value,peroxide value and carbonyl value were lower in walnuts packed by MA packages than that of the control significantly（P0.01）,especially obvious in PE30 and PE50packages,in which relatively high contents of crude protein and fat were detected.All MA packages reduced abscisic acid（ABA）content and maintained significantly（P0.05）higher contents of gibberellic acid（GA）and zeatin riboside（ZR）in the late storage of fresh walnuts than control.Considered the changes of all indicators and the cost,PE30 could be selected as the suitable MA package of fresh walnuts for better shelf quality after cold storage.