关键词: 霜期农业, 霜期农业, 气温, 地面温度, 冻土深度

Abstract: As important garden application flower materials, F. imperialis and F. persica have not only high ornamental value but also bulbs which are big, strong and easy to be cultivated. In order to select the ornamental fritillary varieties which are adapt to the climate of Beijing and could be cultured in the open, the research of introduction adaptability was conducted on 6 fritillary varieties which were introduced from the Netherlands. Some indexes of fritillaries were observed, such as the phenophase, growth indexes, morphological characteristics and flowering characteristics, etc. The result showed that the varieties of ‘Rubra Maxima’, ‘Premier’ and ‘Ivory Bell’ could be directly applied in Beijing; ‘Maxima Lutea’ and ‘Adiyaman’ needed to be further domesticated, because their cultivation characters were not stable. The ‘Aruora’ also needed to be further domesticated, although its germination rate was very high, the flowering rate was not high and it had only a vegetative growth. Maybe it had not adapted to the local climate conditions.