The grow progress of bulb is divided to 5 stages: probulb idiophase, probulb enlargement stage, primarybulb idiophase, bulb weight fast gain stage and bulb plenum stage.

地茎由茎和侧茎两部组成，其长发育可划为5个阶：茎化期、茎膨大期、侧茎形成期、茎快速膨大期、茎充实期。