Experimental research on decreasing the drying rate differences between stems and leaves of the alfalfa
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摘要: 在給出壓扁率定義的基礎上,利用自制的壓扁實驗臺對不同壓扁率和壓強時苜蓿莖的水分損失和干燥特性進行了實驗研究.分析了苜蓿莖上附著的葉片數對其干燥速率的影響,并與單葉和單莖的干燥速率進行了對比.對干燥前后莖、葉的收縮率進行了對比實驗.結果表明:干燥溫度對直徑較大的莖和壓扁率較小的莖的干燥速率影響較大;干燥溫度為100℃和80℃,壓扁率為0·2457時苜蓿莖的干燥速率與葉的干燥速率接近;干燥溫度為100℃時,長度50mm的莖與六片葉相連時莖葉的干燥速率接近單葉的干燥速率;葉短軸的收縮率最大.Abstract: 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.
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Key words:
- alfalfa /
- dehydration /
- drying rate /
- crushing ratio
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