Modeling the edge effect in even-aged Monterrey pine (Pinus radiata D. Don) stands incorporating a competition index
Modeling the edge effect in even-aged Monterrey pine (Pinus radiata D. Don) stands incorporating a competition index
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DOI：
10.1016/j.foreco.2008.03.053
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发表时间：
2008-07
影响因子：
3.7
通讯作者：
Simón Sandoval;J. Cancino
中科院分区：
文献类型：
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作者：
Simón Sandoval;J. Cancino
将两个相邻辐射松林分的 DBH（胸径）的边缘效应建模为距林分边缘的距离和 Hegyi 竞争指数的函数。该建模应用于具有外部竞争压力的边缘和自由边缘。在两种边缘类型中，在建模中纳入 Hegyi 竞争指数显着减少了残差变化。该模型表明，种内竞争的强度因林分而异。特别是，年轻林分中的树木比老林分中的树木对竞争的影响更敏感。然而，看台边缘方面的竞争强度并没有变化。当需要从采样中获得更精确的树木和林分参数估计时，与边缘效应深度相关的研究结果可用于对林分进行分层，并可用于定义用于长期田间测定的实验单元中的缓冲带的宽度。
The edge effect on DBH (diameter at breast height) in two adjacent Pinus radiata D. Don stands was modeled as a function of both the distance from the stand edge and Hegyi's competition index. The modeling was applied to edges with external-competition pressure and on free edges. In both edge types, the incorporation of the Hegyi's competition index in the modeling significantly reduced the residual variation. This modeling showed that the intensity of the intraspecific competition varies between stands. Particularly, the trees in younger stands are more sensitive to the effects of competition than in older stands. However, the intensity of the competition does not vary between edge aspects of stands. The results of the study related to the depth of edge effect can be useful for stratifying stands when getting more precise estimates of trees and stand parameters from sampling are required, and for defining the width of the buffer strip in experimental units used for long-term field assays.