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林业科学 ›› 2011, Vol. 47 ›› Issue (8): 1-6.doi: 10.11707/j.1001-7488.20110801

• 论文 •    下一篇

天目山近自然毛竹林空间结构与生物量的关系

汤孟平1,2, 徐文兵1,2, 陈永刚1,2, 邓英英1, 赵明水3   

  1. 1. 浙江农林大学环境与资源学院 临安 311300;2. 浙江省森林生态系统碳循环与固碳减排重点实验室 临安 311300;3. 天目山国家级自然保护区管理局 临安 311300
  • 收稿日期:2011-01-11 修回日期:2011-05-02 出版日期:2011-08-25 发布日期:2011-08-25

Relationship between Spatial Structure and Biomass of a Close-to-Nature Phyllostachys edulis Stand in Tianmu Mountain

Tang Mengping1,2, Xu Wenbing1,2, Chen Yonggang1,2, Deng Yingying1, Zhao Mingshui3   

  1. 1. School of Environmental and Resource, Zhejiang A & F University Lin'an 311300;2. Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration Lin'an 311300;3. Authority in National Nature Reserve of Tianmu Mountain Lin'an 311300
  • Received:2011-01-11 Revised:2011-05-02 Online:2011-08-25 Published:2011-08-25

摘要:

在浙江省天目山国家级自然保护区内的近自然毛竹林内设置1块100 m×100 m的固定标准地,用相邻网格调查法划分100个调查单元,用全站仪对每株毛竹进行精确定位调查,基于GIS的Voronoi图空间分析功能,确定空间结构单元,选择聚集指数、年龄隔离度、竞争指数和目标竹最近邻竹株数4个空间结构指数,运用主成分分析法,分析近自然毛竹林空间结构与生物量的关系。结果表明: 各空间结构因子的重要性表现为聚集指数>年龄隔离度>最近邻竹株数>竞争指数; 聚集指数与单位面积生物量的负相关关系最明显,较高聚集程度是提高单位面积生物量的前提条件; 年龄隔离度的增加有助于提高毛竹林单位面积生物量,高产毛竹林的年龄隔离度≥0.5; 单位面积生物量随最近邻竹株数增加而降低,当目标竹有4株最近邻竹时,最有可能获得高产; 随竞争指数增加,毛竹林单位面积生物量有下降趋势,但不明显。

关键词: 近自然毛竹林, 空间结构, 生物量, 主成分分析, Voronoi图

Abstract:

In a fixed plot of 100 m×100 m in a close-to-nature Phyllostachys edulis stand, which was divided into 100 units by adjacent grid inventory in Tianmu Mountain National Nature Reserve, Zhejiang Province, a whole station was used to measure coordinates of each bamboo tree. Spatial structure unit was established with Voronoi diagram spatial analysis function of GIS. Four spatial structure indices, including aggregation index, age mingling, competition index and the nearest bamboo number, were selected and principal component analysis was conducted to analyze the relationship between spatial structure and biomass of the P. edulis stand. The results showed that the ranking of spatial structure indices in their importance was: aggregation index>age mingling>the nearest bamboo number>competition index.Aggregation index was significantly negatively correlated with bamboo biomass per unit area, and high aggregation was a basic precondition for improving bamboo biomass per unit area. Increase in age mingling played a role in promoting bamboo biomass per unit area, and age mingling of great bamboo biomass was more than 0.5. Bamboo biomass per unit area decreased with increasing its nearest culm number. When the nearest culm number of target bamboo was four, the target bamboo most likely obtained high production. Bamboo biomass per unit area of target bamboo slightly declined with competition index.

Key words: close-to-nature Phyllostachys edulis stand, spatial structure, biomass, principal component analysis, Voronoi diagram

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