广西植被类型及其分类系统

摘要

[Objective]Vegetation is the most sensitive factor of the local natural biogeography on the Earth,and play an important role in maintaining human being sustainable development and mitigating climate change.The obj ective of this paper was to introtduce systematically the types of vegetation in Guangxi and its classified system and to provide basic data for protection, research and uses of the vegetation.[Methods]Based on the classification principle,unit and sys-tem of China vegetation,the data that included both publications recording the types of Guan-gxi vegetations and authors'vegetation investigation in Guangxi since 1950 were gathered and sorted out.And then two classification systems were drawn up for natural and artificial vegeta-tions of Guangxi.[Results]The natural vegetation in Guangxi could be divided into 4 classes of vegetation type,26 groups of vegetation type,and 722 formations.The artificial vegetation in Guangxi could be divided into 5 vegetation types, 20 vegetation subtypes, and 298 formations.Among 722 formations of natural vegetation,the type numbers of forest,bamboo forest,shrub,herb and hydrovegetation account for 63%,4%,10%,6% and 17%,respectively. Among 2 9 8 formations of artificial vegetation, the type numbers of timber forest,economic frult and tree forest,urban forest vegetation,crop vegetation and artificial paludal and hydric vegetation account for 28%,20%,29%,17% and 6%,respectively.[Conclusion]Guangxi is one of the most rich regions of vegetation types in China with 1020 formations,and has an impor-tant position in the protection,research and uses of vegetation in China.%【目的】植被是地球上最为敏感的自然地理环境要素,在减缓气候变化和实现人类可持续发展中具有无法替代的作用。本文全面、系统地介绍广西植被类型及其分类系统,为植被保护、研究和利用提供基础资料。【方法】通过对已发表记载有广西植被类型以及作者近60年来对广西植被的调查研究资料的收集和整理,并按照《中国植被》一书的植被类型的划分原则、单位和系统,编制成广西天然植被类型分类系统和广西人工植被类型分类系统。【结果】广西天然植被可分为4个植被型纲,26个植被型组,722个群系；广西人工植被分为5个植被型,20个植被亚型,298个群系(组合)。在722个天然植被类型中,森林植被类型占63%,竹林4%,灌丛10%,草丛6%,水生植被17%；在298个人工植被类型中,用材林占28%,经济果木林20%,城市园林植被29%,农作物植被17%,人工沼泽和水生植被6%。【结论】广西植被共有1020个类型(群系),是我国植被类型最丰富的省区,在全国植被保护、研究和利用中具有重要地位。