idiophase

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.

地下由原和两部分组，其长发育可划分为5个阶：原分化期、原膨大期、期、快速膨大期、充实期。