【摘要】 本文采用群落样方法和剖面图解法对西双版纳季节雨林水平及垂直结构做了初步讨论。依立木高度、树冠形态、各层植物叶之解剖结构划分层次;用Raunkiaer的生活型谱统计生活型、叶级、叶质、叶型组成,并对其外貌特点做了讨论,最后跟龙脑香林外貌结构做了比较。通过比较表明:本区大面积混合季节雨林种类组成表现出一些种类分布普遍,另一些种类局限,随地势、地形、土壤和局部气候差异形成多样性组合,这种组合在同一林地也明显,构成嵌镶。在自然地段森林可分七层。组成各层的结构种,幼灌层D多于其他各层,说明D层在结构关系中具较大独立性。乔木、灌木、草本层片是基干层片和构成森林结构的骨架,外貌上以单叶、革质、全缘、中型叶、滴水尖叶为主的常绿阔叶大、中高位芽组成为特征,所有这些表现出与东南亚龙脑香林相似。外貌结构上与具显著干旱季节气候的中印半岛北部更接近。更多还原

【Abstract】 This paper applied to the quadrat method of phytococnology and profile diagram of forest. The writer lias discussed the structure of horizontal and vertical on the seasonal rainforest.According to the permanent quadrat data during the 1958-1965 at the biogeocoenological station in Yunnan tropical forest and the compleniental data for field survey in 1985, the numbers of layer in forest are distinguished by the height of plants with the trees shape of crown and their anatomic structure of leaf blade each layer. A statistical and an analysis of life form, leaf size, using Raunkiaer’s classification, and to its physiognomic structure arc discussed.Lastly, works have been done in the comparative study on the features of physiognomy and structure with tropical equatorial rainforest.The discussion and comparison show that the floristic component of the forest on horizontal distribution there are some species arc the prevalence everywhere, others due to the evolution and spread of species, new species evolve, old species die out or come to occupy more restricted areas, and according as the different local geo-morphy, soil, climate are formed diversity society, from the further constituted mosaic. These society and mosaic in the same a forestland arc striking too. The vertical structure of forest consists of the seven layers in natural forest, and the species of structure each layer, D layer is more than others layer of which appears that have the major independent character interlayer relationship. The trees layer, the shrubs layer, the herbaceous layer and the grounds layes are fundamental synusia and they make up the skeleton in forest structure.The physiognomic dominating features of community are characterized by simple-leaved, leathern, entire, drip-tip and mesophyllous types of evergreen broadleaf megapharierophytes and mesophanerophytes.All above mentioned, this forest indicates that its physiognomyand structure are similar to Dipterocap forest in southeastern Asia, but it is very approach to northern rainforest with a marked seasonal drought in Indo-China peninsula.更多还原