Abstract
From 2005 to 2006, we investigated the effects of dominant tree species in canopy, the present and the past forest floor management, and light environment on bolting population and flowering of Lilium auratum Lindley at the forest on the ridge in Musashi-Kyuryo National Government Park in Saitama prefecture, Japan. The results show:1) more than 9 year duration of mowing increases obviously bolting population, flower-bearing population and the number of flowers per individual, whereas 2 year duration of mowing is not enough to increase them; 2) among 2, 1 and 0.4 times a year mowing, the more frequency of mowing is conducted, the more bolting population, flower-bearing population and the number of flowers per individual increase; 3) the growth of L. auratum is suppressed where deciduous broad leaf trees such as Quercus serrata Thunb. are dominant in canopy compared with where Pinus desiflora Sieb. is dominant because less light reaches the forest floor.
