Allometric model of the maximum size–density relationship between stem surface area and stand density
Allometric model of the maximum size–density relationship between stem surface area and stand density
复制标题
茎表面积与林分密度之间最大尺寸-密度关系的异速生长模型
DOI：
10.1007/s10310-009-0128-6
复制
发表时间：
2009
影响因子：
1.5
通讯作者：
Akio Inoue
中科院分区：
文献类型：
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作者：
Akio Inoue
提出了平均茎表面积和林分密度之间的最大尺寸-密度关系的异速生长模型，并拟合了日本雪松（Cryptomeria japonicaD. Don）和日本柏树（Chamaecyparis obtusaEndl.）等龄纯林的数据。为了推导该模型，生物量密度被定义为假想柱的平均茎表面积与侧面积的比率，其半径和高度分别等于树木所占的平均面积的半径和平均树高。根据该模型，对数坐标上最大尺寸-密度关系的斜率可以根据平均树高和生物量密度与平均茎表面积的异速生长关系来估计。雪松的所得斜率是 -1.089，柏树的斜率是 -0.974。估计的最大尺寸-密度关系与过度拥挤的雪松和柏树林分的平均茎表面积和林分密度的组合相符。与柏树相比，雪松的坡度更陡是因为为高度生长分配了更多的资源。雪松的最大茎总表面积约为 1.483 公顷/公顷，柏树的最大总茎表面积约为 0.949 公顷/公顷。两个物种之间最大总茎表面积的差异是由与树高和填充已占据空间的茎生物量相关的特征产生的。
An allometric model of the maximum size–density relationship between mean stem surface area and stand density is proposed, and is fitted to data for even-aged pure stands of Japanese cedar (Cryptomeria japonicaD. Don) and Japanese cypress (Chamaecyparis obtusaEndl.). To derive the model, the biomass density was defined as the ratio of the mean stem surface area to the side area of an imaginary column, of which radius and height were equal to the radius of the mean area occupied by a tree and mean tree height, respectively. According to the model, the slope of the maximum size–density relationship on logarithmic coordinates can be estimated from the allometric power relationships of mean tree height and biomass density to mean stem surface area. The resulting slope was −1.089 for the cedar and −0.974 for the cypress. The estimated maximum size–density relationship corresponded well with the combinations of mean stem surface area and stand density for the overcrowded stands of cedar and cypress. The steeper slope for cedar was attributed to the allocation of more resources to height growth compared to cypress. The maximum total stem surface area was approximated to be 1.483 ha/ha for cedar and 0.949 ha/ha for cypress stands. The difference in the maximum total stem surface area between the two species was produced by the characteristics related to tree height and stem biomass packing into space already occupied.