白苏种子的冻干萌发特性研究  

Study on Germination Characteristics of Freeze-Dried Perilla Seeds

作　　者：张青[1] 魏燕[1] 姜若文 庞永琳 Zhang Qing;Wei Yan;Jiang Ruowen;Pang Yonglin(School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《黑龙江科学》2021年第24期62-64,68,共4页Heilongjiang Science

摘　　要：为探究冷冻干燥是否适用于白苏种子的保存,测量了白苏种子的外部形态数据、百粒重、含水量、吸水率等参数;利用DSC技术测得白苏种子共晶共熔点分别为-17.4℃和-0.2℃,从而确定预冻温度为-25℃和升华干燥温度为0℃。设置对照组,测定热风干燥和冷冻干燥处理后种子的含水量和复水率,每天记录种子的萌发状况,发现热风干燥处理后的种子复水率较低,但是发芽状况良好,与对照组相近;冷冻干燥后的种子复水性很好,但萌发状况并不理想。In order to explore whether freeze-drying is suitable for the preservation of common perilla seeds,the external morphological data,grain weight,water content and water absorption rate were measured firstly.The eutectic point and congruent melting point of perilla seeds were measured by DSC technology,which were-17.4℃and-0.2℃,so as to determine that the prefreezing temperature was-25℃,and the sublimation drying temperature was 0℃.By setting up a control group,the moisture content and rehydration rate of seeds after hot air drying and freeze-drying treatment were determined,and the seed germination status every day was recorded.It was concluded that the rehydration rate of the seeds after hot air drying treatment was lower,but the germination was good,which was similar to the control group,while the rehydration rate of the seeds after freeze-drying treatment was good,but the germination was not ideal.

关 键 词：白苏种子 冷冻干燥 热风干燥 差示扫描量热法 发芽率 

分 类 号：S482.2[农业科学—农药学]