青藏高原10种百合科植物幼苗建植与种子大小的关系及其对光照的响应

Ten common Liliaceae species from the eastern Qinghai-Tibetan Plateau was used in this article. the effects of light gradients (100%, 67%, 35% and 4% full natural sunlight) and seeds size on their seeding emergence rate, seeding survival probability and seeding establishment rate. was investigated as well. The results showed that: light intensity had a significant impact on seed germination and seedling establishment, which was not significant on seeding survival probability; Different light gradients was not significant on the seeding emergence rate and the seeding establishment rate of Aletris glandulifera , Allium przewalskisnum , Allium chrysocephalum and Lilium duchartreif, but the light conditions of L100 can promote the emergence of Allium mongolicum and Allium polyrhizum, and suppress of the emergence of Allium rude and Allium sikkimens , Lilium pumilum has the lowest rate of emergence in the L35 light conditions and the highest rate of emergence in the L67 light conditions .seed size also played an important role in seedling establishment process, which may work on the responses of seed germination, seedling survival and seedling establishment to light intensity. Because of the important roles of seeding emergence, survival probability and establishment in community assembly, considering of the seed size of different species and local lighting conditions was critical to effective natural grassland restoration and artificial grassland reconstruction. And in the different light conditions , seeding emergence rate and seeding establishment rate were different of seed size, the smallest difference was in the light conditions of L100 and the biggest difference was in the light conditions of L4.