| 摘要: |
| 【目的】调查研究陕南野生乔木树种资源，为该区野生植物资源的合理开发利用提供依据。【方法】采用样线和样地调查相结合的方法，对陕南乔木树种的种类组成、地理分布区类型和观赏特点等进行研究。【结果】1）陕南地区乔木树种共计57科139属344种，其中槭树科、蔷薇科、壳斗科和桦木科为优势科，槭树属、李属、栎属和鹅耳枥属为优势属；常绿乔木83种，落叶乔木261种；单子叶植物7种，双子叶植物337种。2）该区乔木树种属于11个地理分布区类型，其中世界分布类型居首位，占28.06%。3）该区乔木树种按观赏特点可分为5大类，以观叶类最多，占28.49%；其次为观花类和观冠类，分别占25.58%和21.51%；观干类较少，占13.95%；观果类最少，仅占10.47%。【结论】陕南乔木树种资源丰富，开发利用潜力巨大，加强对野生乔木树种的合理引种，可以丰富城镇园林植物的多样性。 |
| 关键词: 乔木树种 区系成分 观赏特点 陕南地区 |
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| Diversity of arbor trees in Southern Shaanxi |
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YANG Jian-hu,ZHEN Xue-yuan,LEI Wei-bin,et al
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| Abstract: |
| 【Objective】This study investigated wild arbor tree resources in Southern Shaanxi to support the proper exploitation and utilization of wild plants in this area.【Method】Sample plot method and line intercept method were adopted to study the families/genera,floristic elements,and ornamental characteristics of arbor trees in Southern Shaanxi.【Result】(1) A total of 344 species belonging to 57 families and 139 genera were found in Southern Shaanxi,including 83 evergreen arbor trees and 261 deciduous arbor trees (7 monocotyledons and 337 dicotyledons).Among all the wild plants,dominant families consisted of Aceraceae,Rosaceae,Fagaceae and Betulaceae,and the dominant genera were Acer,Prunus,Quercus and Carpinus.(2) Arbor trees genera in this area could be divided into 11 regional types.The cosmopolitan floristic elements were the highest,accounting for 28.06% of the total.(3) There were five arbor trees ornamental types.Leaf ornamentals,flower ornamentals,crown ornamentals,trunk ornamentals,and fruit ornamentals accounted for 28.49%,25.58%,21.51%,13.95%,and 10.47%,respectively.【Conclusion】Wild arbor tree resources in Southern Shaanxi were rich with great potential for exploitation. They could be scientifically introduced to landscape field to enrich the diversity of urban landscape plants. |
| Key words: arbor trees floristic elements ornamental value Southern Shaanxi |
