山药属薯蓣科,多年生草质藤本植物,以肥大的茎为主要食用器官,营养丰富、菜药兼用,食用价高、用途广、效益好。沛县是江苏省山药主要生产地,每年种植面积6万亩以上。沛县出产的山药畅江苏及鲁、豫、皖等周边地区,远销上海、北京、南等大中城市,出口日、韩等国家,深受国内外消费 Yam is a yam family, perennial grass liana, with hypertrophy stems as the main edible organs, nutrient-rich, both vegetable and medicine, high consumption, wide use, good efficiency. Peixian is the main producing area of ​​yam in Jiangsu Province, planting more than 60,000 mu each year. Pei County yam Jiangsu and Jiangsu, Henan, Anhui and other peripheral areas exported to Shanghai, Beijing, South and other cities, exports Japan, South Korea and other countries, by domestic and foreign consumption