苣荬菜生物学特性研究

STUDIES ON BIOLOGICAL PROPERTIES OF PERENNIAL SOWTHISTLE

系统研究了苣荬菜的形态、发生规律、生育特性和繁殖规律．苣荬菜再生苗的发生数量及发生时间受播深和根长的影响很大，播深和根长与发生数量显著负相关；播深与发生时期显著负相关，但根长与发生时间显著正相关，实生苗比再生苗发生时间晚１０～２０天，实生苗当年即能开花结实，并且也能够与再生苗一样形成当年就具有再生能力的营养繁殖体．

The morphology growing,developing and reproducing properties of perennial sowthistle(Sonchus brachyotus DC.),were studied systematically. It was shown that the number of regrowth sprouts was negatively correlated with planting depth and root length,and the emergence time of regrowth was correlated negatively with planting depth also,but positively with root length. The seedlings from the seeds, which would emerge 10 to 20 days later than regrowth ones, could flower and set seeds in the current year,and produce vegetative propagation which had the potential of regrowth in the same year as the regrowth sprouts.