减少苜蓿茎和叶干燥速率差异的实验研究

Experimental research on decreasing the drying rate differences between stems and leaves of the alfalfa

在给出压扁率定义的基础上,利用自制的压扁实验台对不同压扁率和压强时苜蓿茎的水分损失和干燥特性进行了实验研究.分析了苜蓿茎上附着的叶片数对其干燥速率的影响,并与单叶和单茎的干燥速率进行了对比.对干燥前后茎、叶的收缩率进行了对比实验.结果表明:干燥温度对直径较大的茎和压扁率较小的茎的干燥速率影响较大;干燥温度为100℃和80℃,压扁率为0·2457时苜蓿茎的干燥速率与叶的干燥速率接近;干燥温度为100℃时,长度50mm的茎与六片叶相连时茎叶的干燥速率接近单叶的干燥速率;叶短轴的收缩率最大.

Based on the definition of crushing ratio, the moisture loss and drying characteristic of crushed stems of the alfalfa at different crushing ratios and pressures were studied. The influence of leaf numbers attached on an alfalfa stem on the drying rate was analyzed and compared with that of a single leaf and a single stem. The shrinkages of stems and leaves before and after drying were comparatively investigated. The results show that drying temperature has significant influence on alfalfa stems with bigger diameters and less crushing ratios. At drying temperatures of 100℃ and 80 ℃, the drying rate of the alfalfa stem with a crushing ratio of 0.245 7 is close to that of an alfalfa leaf. At a drying temperature of 100 ℃, the drying rate of the stem of 50 millimeter long with shrinkage of an alfalfa leaf is the largest in the short six leaves attached is close to that of a single leaf. The axis direction.