浙江天童常绿阔叶林地被层的种类组成

本文对天童常绿阔叶林地被层的种类组成进行了初步研究。研究表明：组成地被层计有维管植物４４科７８属１１４种。蕨类植物优势度最大，里白占绝对优势。草本植物３９种，以世界分布科和地面芽植物为主，常绿种类占８４．６％，未见亚洲和北美洲间断分属的地理成分。

The Species Composition of the Evergreen Broad-leaved Forest Floor in Tiantong, Zhejiang Province

The species composition of the evergreen broad - leaved forest floor in Tiantong were studied. The results were as follows: there were 44 families, 78 genera 114 species of vascular plants in the living floor, and in which the pteridophyta were the most dominant, in particular,the Diplopterygium gleucum occupied the most dominant among the Pteridophyta. The cosmopolitan families and hemicryptophyte occupied the highest percentage of the herbs, in which,the evergreen species occupied 84. 6 %. And the geners of the Asian and North American discontinuous distribution were not discovered. The seedling of tree and shrub accounted 51 species, in which, 80% of the numbers belonged to 4~6 species. There were 24 species of liana in the living floor, in which, the herbaceous species occupied 25%, and the deciduous species occupied 42%. The seeds of the tree dominant species were consumed mostly by rodents. On the ground,between Bryophytes cover and litter exhibited mosaic distribution pattem. In late - successional communities, the living floor were shorter, less density, less coverage, higher species diversity index, higher seedling density of the tree and shrub, more Bryophytes species, higher Bryophytes coverage. There were differences between the litter of weed and litter fall in the died floor. Main components of the litter of weed were the died leaves of Diplopterygium glaucum,which remained on the plant.