大部分药用原料在初步加工后应迅速晒干,否则将会很快地丧失有效物质或腐败。多数植物在采收后的一定时期内仍具生活力,能进行呼吸,蒸发水分等。当细胞膜丧失了半透性和酶丧失了特性时,开始破坏糖甙、生物碱和其他活性物质,致使植物本身改变色泽,失去固有的性味。在湿润的原料中,特别是当它堆积的层次过厚而自动发热时,夹杂到里面去的微生物迅速繁殖面开始腐烂。因此,干燥的主要 Most of the raw materials should be quickly dried after initial processing, otherwise the effective substances or spoilage will soon be lost. Most plants remain viable for a certain period of time after harvesting and can breathe and evaporate water. When the cell membrane loses its translucency and the enzyme loses its properties, it begins to destroy glycosides, alkaloids and other active substances, causing the plant itself to change color and lose its natural taste. In moist raw materials, especially when it accumulates too thickly to automatically generate heat, the rapidly growing surface of the microorganisms entrained therein starts to decay. Therefore, the main drying