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如何鉴定茯苓的好坏
更新时间: 2020-09-16 00:00:00  

干燥根茎为不规则块状,略呈扁圆柱形而弯曲不直,多分歧,有结节状隆起,长约5至 15厘米,直径约2至5厘米;表面土棕色或棕色,粗糙,常有刀伤切口及侧根残余部分,上端具茎痕;质坚硬,不易折断,断面粗糙,有粉性,淡棕色;气微,味甘淡。

土茯苓片为长形薄片,大小不等,厚约1至3毫米,边缘不整齐,淡棕色或淡黄色;表面光滑(薄片)或稍粗糙(厚片)。中间略具维管束点,仔细观察时可见砂砾样的光亮。纵切片常见花纹。导管不规则,富粉质,微有弹性,用水润湿后,手摸之有光滑感。以淡棕色、粉性足、纤维少者为佳。

关键词: 如何 鉴定 茯苓 好坏

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