农业机械学报2025，Vol.56Issue(11)：177-183,7.DOI:10.6041/j.issn.1000-1298.2025.11.016
不同预处理与干燥方式下苜蓿干燥特性研究
Study on Drying Characteristics of Alfalfa under Different Pretreatments and Drying Methods
摘要
Abstract
Due to the high initial moisture content of alfalfa and the unreasonable drying process,the problems of high drying energy consumption and poor quality of alfalfa was caused.The effects of different pretreatment methods(fracturing,sun dried,and crushing dehydration)and drying methods(infrared drying 60℃,hot air drying 60℃)on the drying characteristics and quality of alfalfa were investigated.The drying model for alfalfa was established,and the optimal energy-saving drying process was determined.The experimental results showed that the infrared drying time under different pretreatment conditions was shortened by 21.6％～45.3％compared with that by the hot air drying method.Under the same drying method,the drying time of the sun dried pretreatment group was the shortest due to the low initial moisture content of alfalfa,which was reduced by more than 70％compared with the untreated group.The drying time of the crushing dehydration pre-treatment group was the second shortest.Under different drying methods,the red-green value of alfalfa was lower,and the yellow and blue value of alfalfa was higher in the untreated and fracturing pretreatment groups,which indicating the least color loss.The color loss of sun dried pretreatment group was relatively larger than that of others pretreatments,where the brightness value and the yellow and blue value were increased due to the loss of chlorophyll caused by long-term drying.The crude protein content of alfalfa after sun dried pretreatment was the highest.The relative feed value(RFV)of alfalfa in the sun dried pretreatment group was the highest,with a RFV value greater than 150,which was 11.37～12.95 higher than that of the untreated group.The crude protein content and RFV value of the crushing dehydration pretreatment group were the lowest,which was due to that the alfalfa juice squeezed out and the structure of the leaves and stems significantly damaged.The optimal drying process for alfalfa was the sun dried pretreatment and 60℃infrared drying group.关键词
苜蓿/预处理/红外干燥/热风干燥Key words
alfalfa/pretreatment/infrared drying/hot air drying分类
农业科技引用本文复制引用
孙庆运,韩梦龙,于贤龙,赵峰,贾振超,武文璇,张宗超..不同预处理与干燥方式下苜蓿干燥特性研究[J].农业机械学报,2025,56(11):177-183,7.基金项目
国家自然科学基金青年科学基金项目(32201691)和山东省农业科学院国际(地区)科技合作专项(CXGC2025H35) （32201691）
