山药是薯蓣科薯蓣属草本蔓生性植物。紫山药是山药的一个独特品种类型,其薯块富含花青素色素,在浙江又被称为莳药。它具有适应能力强、营养价值高、用途广等特点,既可以作佳肴,又可以作保健药材。随着紫山药市场需求量的增大,其种植面积也有所扩大。紫山药不像棒状山药那样,其形状不规则,表面不光滑,影响其销售,这在一定程度 Yam is Dioscorea dioscoreaceae herbaceous plant. Purple Yam is a unique species of yam type, its tubers are rich in anthocyanin pigment, also known in Zhejiang as dill. It has strong adaptability, high nutritional value, versatility and other characteristics, both for food, but also for health herbs. With the purple yam drug market demand increases, its acreage has also been expanded. Purple yam unlike sticky yam, as its irregular shape, the surface is not smooth, affecting its sales, which to some extent