弱光照射及保鲜剂对芦笋冷藏品质的影响

Effect on the quality of asparagus in cold storage with weak light illumination and fresh-keeping agent

采用在普通冷藏环境下引入弱光照射和化学保鲜剂6-BA、壳聚糖处理来延长芦笋的货架期,并考察弱光照射与化学保鲜剂对芦笋冷藏效果的协同作用。弱光光源使用红色发光二极管,6-BA浓度为10 mg/L,壳聚糖浓度为1.5%,定期检测芦笋的感官、失重率、Vc含量、叶绿素含量、可溶性固形物和纤维素含量6个指标。实验结果表明将弱光照射引入到普通冷藏环境,可以较好地改善芦笋的贮藏品质,在贮藏前期还可以增加芦笋的Vc含量、阻止叶绿素的降解、推迟并延长芦笋的后熟期,减缓纤维素含量的增加,但在控制芦笋失水率方面作用不大;6-BA处理和壳聚糖涂膜对芦笋贮藏品质的改善也有积极的作用。本实验期望把弱光照射和化学保鲜剂引入普通冷藏能成为一种新的芦笋保鲜工艺。

A new approach combining cold storage with weak light illumination and chemical fresh-keeping agents of 6-BA ＆ chitosan was used to prolong shelf life of asparagus. Moreover, the low light illumination＇s cooperation with chemical fresh-keeping agent was also studied. Red light emitter diode was used as photo source with low light intensity. The concentration of 6-BA and chitosan is 10 mg/L and 1.5% separately, sample＇s sensory evaluation, weight loss rate, Vc content, chlorophyll content, soluble solid content and fiber content were tested periodically. The experimental results indicated that the cold storage with weak light illumination can improve quality of asparagus in the storage, increase the Vc content of asparagus in the earlier period of storage, prevent the chlorophyll degeneration, postpone and extend asparagus post-harvest ripening period, but have no remarkable effects on the water loss rate of asparagus. The treatment with 6-BA and chitosan has positive effect on the asparagus storage performance. It was expected that the cold storage with the weak light illumination and chemical agent treating could become a new method to keep asparagus fresh.