【摘要】 为明确徐州山地现有侧柏人工林下层木本植物的自然更新状况,依据40个20m×20m样地群落的调查数据,分析了林下自然更新的木本植物的组成及其相似性。结果表明,侧柏人工林下层自然更新的木本植物中单科种、单属种优势明显,林下木本植物区系组成复杂,出现的12种区系地理成分中,温带成分占主体,热带成分占较大比例。侧柏人工林下层出现的木本植物种类较多,但不同生境下群落的物种丰富度和多样性不高、组成树种的相似性极高,尤其是乔木树种的相似性明显高于灌木树种。林下木本植物的种类组成受立地条件和种子传播方式的显著影响,建议改善立地条件以提高林下木本植物的丰富度和多样性,同时控制外来树种的侵入以促进人工林的地带性演替。更多还原

【Abstract】 In order to explore the natural regeneration condition of understory woody species in Platycladus orientalis plantation in Xuzhou mountainous region,40 plots of 20 m×20 m were set up and surveyed,and composition and similarity of the communities were analyzed.The result showed that the single-species family,the single-species genera were the main part of natural regeneration woody plants in understory of Platycladus orientalis plantation,the composition of understory woody species was complex.There were 12 geographic elements of the flora,and the temperate elements were the main part of the woody flora and the tropic element hold a great proportion.Although the richness and diversity of understory woody species was lower,the similarities of understory woody species between plots were very high,especially,the similarities of tree species were significant higher than the shrubs.Composition of understory woody species was influenced by the habitat and the seed dispersal;Therefore,the habitats of understory should be improved to raise the richness and diversity of understory woody species,and the invasion of alien species should be controlled to prompt succession of zonal vegetation in Platycladus orientalis plantations.更多还原