曾绍校, 梁静, 郑宝东, 赵扬帆, 林鸳缘. 不同干燥工艺对莲子品质的影响[J]. 农业工程学报, 2007, 23(5): 227-231.
    引用本文: 曾绍校, 梁静, 郑宝东, 赵扬帆, 林鸳缘. 不同干燥工艺对莲子品质的影响[J]. 农业工程学报, 2007, 23(5): 227-231.
    Zeng Shaoxiao, Liang Jing, Zheng Baodong, Zhao Yangfan, Lin Yuanyuan. Effects of different drying technology on the quality of lotus-seed[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2007, 23(5): 227-231.
    Citation: Zeng Shaoxiao, Liang Jing, Zheng Baodong, Zhao Yangfan, Lin Yuanyuan. Effects of different drying technology on the quality of lotus-seed[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2007, 23(5): 227-231.

    不同干燥工艺对莲子品质的影响

    Effects of different drying technology on the quality of lotus-seed

    • 摘要: 为深入了解不同干燥工艺对莲子干燥后品质的影响,该文以干燥后莲子的收缩率、复水率、抗性淀粉(RS)含量、色泽和组织结构为考察对象,研究了自然干燥、热风干燥、真空干燥、冷冻干燥、微波干燥和微波—热风联合干燥等6种不同干燥工艺对莲子品质的影响。结果表明:微波—热风联合干燥莲子的收缩率小,复水率高,RS含量低,色泽与莲子原始指标较接近,且能够较好地保持莲子的原始组织结构;微波干燥莲子的品质仅次于微波—热风联合干燥莲子;冷冻干燥莲子的收缩率和复水率均最佳,但RS含量高,色泽较莲子原始指标差,且组织结构发生了明显的变形和皱缩;自然干燥、热风干燥、真空干燥莲子的品质均较差。综合考虑,微波—热风联合干燥后的莲子除RS含量较低外,其他品质均较优,可作为最佳干燥方法应用于生产。

       

      Abstract: Effects of different drying technology(sun drying, hot-air drying, vacuum drying, freezing drying, microwave drying and combined microwave and hot-air drying) on the shrinkage, rehydration ratio, resistant starch(RS) content, color and organization structure of lotus-seed were studied. The results show that lotus-seeds obtain less shrinkage, higher rehydration ratio, lower RS content, less distortion and better color by combined microwave and hot-air drying. Its color and organization structure is close to the fresh lotus-seed. The quality of lotus-seed by microwave drying is next to those by combined microwave and hot-air drying. Freezing drying makes lotus-seeds the lest shrinkage and the highest rehydration ratio, but higher RS content, worse color and obvious distortion and shrinkage. The quality of lotus-seeds by sun drying, hot-air drying and vacuum drying are inferior to the others. So combined microwave and hot-air drying is the optimal technology.

       

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