In this study, varieties of carrots were used as experimental material, including NIGEL, NEVIS, NANDRIN, CASCADE and XIN HEITIAN WUCHUN. The research was focused on the analysis of carotenoids in carrot by high performance liquid chromatography(HPLC). The content of lycopene, a-carotene and p-carotene during growing and the content of carotenes in different parts of different varieties were measured, in order to study the difference of the development of the content of carotenes among varieties,...