| 北京专属单位区树木数量结构特征与三维绿化结构 |
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| 引用本文： | 郄光发,王成.北京专属单位区树木数量结构特征与三维绿化结构[J].东北林业大学学报,2011,39(6):68-71. |
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| 作者姓名： | 郄光发 王成 |
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| 作者单位： | 中国林业科学研究院林业研究所; |
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| 基金项目： | 国家“十一五”科技支撑专项(2006BAD03A17) |
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| 摘 要： | 在对北京建成区学校、医院、机关附属事业单位、工厂、企业等52个专属单位进行每木调查的基础上,研究了不同类型单位区树木数量结构、胸径等级分布和立木层次结构,提出了单位区绿化发展建议。结果表明,毛白杨(Ⅳ=0.465)、国槐(Ⅳ=0.311)、侧柏(Ⅳ=0.188)、泡桐(Ⅳ=0.180)、雪松(Ⅳ=0.170)、油松(Ⅳ=0.150)、银杏(Ⅳ=0.101)是单位区重要值最高的几个树种,其累计数量占到了研究区树木总株数的54.7%,相对覆盖度累计达到0.697。单位区乔木植株平均高度10.6 m,平均胸径21.4 cm,径级区间(10 cm≤DB,H<20 cm)和立木层次(5 m≤h<15 m)上分布的植株数量和树种数量最多,单位区现有树木水平径级结构与立木层次结构分布相对合理,但树木数量整体偏少,多数单位区还没有形成一个成熟的群落结构。重度修剪、立地环境差和建筑物阻挡是制约单位区树木三维绿量扩增的主要因素,建议通过补植高大乔木的措施增加单位区绿量空间,实现树冠下地面空间利用和冠层绿量空间拓展的有机结合。
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| 关 键 词： | 北京 专属单位区 树木数量结构 三维绿化结构 |
Quantitative Characteristics and Three-Dimensional Structure of Forest Communities in Beijing Enterprise and Institution Areas |
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| Qie Guangfa,Wang Cheng.Quantitative Characteristics and Three-Dimensional Structure of Forest Communities in Beijing Enterprise and Institution Areas[J].Journal of Northeast Forestry University,2011,39(6):68-71. |
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| Authors: | Qie Guangfa Wang Cheng |
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| Institution: | Qie Guangfa,Wang Cheng(Research Institute of Forestry,Chinese Academy of Forestry,Beijing 100091,P.R.China) |
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| Abstract: | The structure of tree quantity,the distribution of diameter at breast height(DBH),and the stratum structure were analyzed by investigating all trees in 52 enterprise and institution areas in Beijing.Some suggestions on afforestation of enterprise and institution areas were proposed.Results showed that Populus alba,Sophora japonica,Platycladus orientalis,Paulewnia fortunei,Cedrus deodara,Pinus tabulaeformis and Ginkgo biloba in the enterprise and institution areas had higher importance values,which were 0.46... |
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| Keywords: | Beijing Enterprise and institution areas Forest quantitative characteristics Three-dimensional structures |
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