关键词: 细叶百合, 传粉, 访花者, 花蜜, 环境

Abstract: Pollination ecology of cultivated Lilium pumilumu was studied preliminarily. Results showed that the flowers of L. pumilum is come into blossom at 2:30~3:30 a.m. and in full-blown at 5:30~7:00 p.m. The florescence of individual flower and population flowers are 3~4 d and 12 d, respectively. Nectar secrets in the first day of florescence and reaches maximum at 9:00~11:00 a.m. The peak of nectar secretion is consistent with the peak of insects visiting flowers. The main constitutes of nectar volatile are glucose, arabinose, β-D fructopyranose, palmic acid, methylpalmitate, myristic acid, lauric acid and tridecane. L. pumilum propagates mainly by cross-pollination, partly by self-copulation. Flower-visiting insects concern the species of Nymphalidae, Apoidea and Syrphidae. Pollinating insects involve Argynnis paphia, Venessa indica, Aporia crataegi, Megachile willoughbiella and Lasioglossum denticolle. Among them Lasioglossum denticolle is the most active insect. During sunny day, the frequency for visiting flowers of Lasioglossum denticolle is positive correlation extremely and remarkably with the daily change of light intensity and temperature, respectively and is negative correlation evidently with humidity. But during cloudy day, the frequency for visiting flowers of this insect is correlated extremely with air temperature and correlated notably with air humidity.

Key words: Lilium pumilum, pollinator, floral visitor, nectar, environment