plenum

1.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.

茎由原生茎和侧生茎两部分组成，其生长发育可划分为5个阶段：原生茎分化期、原生茎膨大期、侧生茎形成期、茎快速膨大期、茎充实期。