利用常规分析方法比较了芜菁、萝卜和大头菜 3种块根类蔬菜的品质及其营养价值。结果表明 :芜菁的总糖、总酸、可溶性糖 /总糖、抗坏血酸含量明显高于萝卜和大头菜 ,可溶性糖和游离氨基酸含量高于萝卜而与大头菜相当 ,而粗纤维则明显低于萝卜和大头菜 ;芜菁中的蛋白质、胡萝卜素、核黄素、钙等含量也明显高于萝卜和大头菜。认为 3种块根类蔬菜中芜菁的品质和营养价值最佳 ,其次是大头菜、萝卜。 The quality and nutritional value of three root vegetables of turnip, radish and kohlrabi were compared by routine analysis. The results showed that the contents of total sugar, total acid, soluble sugar / total sugar, ascorbic acid in turnip were significantly higher than those in radish and rutabaga, and the contents of soluble sugar and free amino acid were higher than those in radish but the crude fiber was lower than that in radish and Rutabaga; turnip protein, carotene, riboflavin, calcium and other content is also significantly higher than radish and rutabaga. It is concluded that the quality and nutritional value of turnip in three root vegetables are the best, followed by kohlrabi and radish.