Abstract:

This paper reports the germination rate,survival rate and adaptability index of Manglietia yuyuanensis and Manglietia insignis and compiles a dynamic life table based on the investigation data during the seedling stage.The result showed that the adaptability index of Manglietia yuyuanensis was 0.187 5 and Manglietia insignis was 0.138 5 Much difference exist between them. The adaptability of the former was 35 38% higher than that of the latter. Their emergence percentages were 28.0% and 22.5% respectively, only arriving at the seeds vitality samara rates of 34.1% and 29.6% respectively. After a growing season, their survival rates became 66.96% and 61.56% respectively. There were extremely significant differences between them. The death danger period of the two species appeared from the 5^th April to the 5^th May and from the 20^th May to the 5^th July. It's necessary to increase the seedling management lever in order to enhance the survival rate in the seedling raising process,especially at these critical stages.

Key words: Manglietia yuyuanensis, Manglietia insignis, Seedling period, Life table