乳源木莲与红花木莲苗期动态生命表

乳源木莲 (Manglietiayuyuanensis)和红花木莲 (Manglietiainsignis)均为木兰科 (Magnoliaceae)木莲属 (Man glietia)常绿阔叶乔木树种 ,生长迅速 ,树干通直 ,其木材纹理通直 ,结构细密 ,有光泽、香味 ,心材耐腐 ,不翘不裂 ,加工容易 ,是优良的装饰用材和胶合板材树种 ,也是世界上现有被子植物中原始类群的孑遗植物 (张维珍 ,1989;邱以祥 ,1991;1994 ) ,是我国北纬 34°以南 ,经济价值很高的珍稀濒危树种之一 ,对古植物学和植物系统发生学有重要的科研价值 (张维珍 ,1989)。其根、叶、花、果均为优等药材 (张维珍 ,1989;邱以祥 ,1991;1994…

The Dynamic Life Table at Seedling Stages for Manglietia yuyuanensis and M.insignis

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.