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山药别名怀山药，为薯蓣科薯蓣属植物。山药是药食兼优的植物，以块根和珠芽供药用，具有健脾、固精、补肺、益肾的功能；其块根肉质细腻，营养丰富，是味美可口的佳肴。1形态特征及生长习性1.1形态特征多年生缠绕草质藤本植物。块根肉质肥厚，呈圆柱形，长50～90cm，直径3～8c
Yam alias yam yam, for Dioscorea Dioscoreaceae. Yam is a good medicine and food plants, with roots and pearl bud for medicinal purposes, with spleen, solid essence, lungs, kidney function; fine tuberous roots, nutrient-rich, is a delicious delicacy. 1 Morphological characteristics and growth habit 1.1 Morphological characteristics Perennial winding grass liana. Root tuber meat hypertrophy, cylindrical, length 50 ~ 90cm, diameter 3 ~ 8c