This study aimed to investigate the drying effects on the retention of cannabidiol and terpenes in the industrial hemp (Cannabis sativa L.). Hemp inflorescence and leaves from Pipeline, Maverick and Queen-Dream-CBD varieties were dried with hot air (40, 50, 60, 70, 90 °C), and sequential infrared and hot air drying (infrared preheating for 1 and 2 min, then hot air drying at 40 and 60 °C). Ambient air drying and freeze drying were conducted as control groups. As the drying temperature increased from ambient to 90 °C, drying time reduced from 1800 to 210 min, cannabidiolic-acid conversion increased from 0.2%–14.1%, and total terpene retention decreased from 82.1%–29.9%. The total cannabidiol retention (ranging from 83.8%–98.6%) was affected by the drying methods and conditions. The findings suggested that drying conditions should be tailored to the requirements of the final products, which provides important information to the industry for improving the postharvest drying, downstream processing and product development.

本研究旨在研究干燥对工业大麻（Cannabis sativa L.) 来自 Pipeline、Maverick 和 Queen-Dream-CBD 品种的大麻花序和叶子用热空气（40、50、60、70、90°C）和连续红外和热风干燥（红外预热 1 和 2 分钟，然后在 40°C 和 60°C 下热风干燥）。常温干燥和冷冻干燥作为对照组。随着干燥温度从环境温度升高到 90 °C，干燥时间从 1800 分钟减少到 210 分钟，大麻二酸转化率从 0.2% 增加到 14.1%，总萜烯保留率从 82.1% 到 29.9% 下降。总大麻二酚保留（范围为 83.8%–98.6%）受干燥方法和条件的影响。研究结果表明，干燥条件应根据最终产品的要求量身定制，这为行业改进收获后干燥提供了重要信息，