采用比较研究法 ,对空心块茎与健康块茎解剖结构及营养特点的研究结果表明 ,无论是空心块茎还是健康块茎都是环髓区细胞大于心髓区细胞 ,空心块茎的细胞比健康块茎的细胞大 ;空心块茎环髓区细胞壁厚度比健康块茎的厚 ,而心髓区细胞壁厚度则比健康块茎的薄 ;空心块茎的淀粉、蛋白质、氮、磷、钾、镁 ,特别是钾、镁的含量显著低于健康块茎 ,但可溶性糖和还原糖含量却高于健康块茎 The comparative study showed that the anatomical structure and nutritional characteristics of hollow tuber and healthy tuber showed that both hollow tuber and healthy tubercle were larger in medulla oblongata than in medullary region and hollow tuberous were larger than those in healthy tuber. Hollow tubers had a thicker cell wall than the healthy tubers in the medullary zone and a thinner cell wall in the medullary zone than healthy tubers. The contents of starch, protein, nitrogen, phosphorus, potassium, magnesium, especially potassium and magnesium in hollow tubers were significantly lower Healthy tubers, but soluble sugar and reducing sugar content is higher than healthy tubers