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.

地下鳞由原生鳞和侧生鳞两部组成，其生长发育可划为5个阶段：原生鳞化期、原生鳞膨大期、侧生鳞形成期、鳞膨大期、鳞充实期。