西北林学院学报2012，Vol.27Issue(5)：163-168,6.DOI:10.3969/j.issn.1001-7461.2012.05.31
基于空间结构优化的采伐木确定方法研究
Determination Method of Cutting Tree Based on Forest Stand Spatial Structure Optimization
摘要
Abstract
Based on the 147 trees within the sample plots of natural mixed spruce-fir forest which was located in Jingou Forestry Farm administrated by Wangqing Forestry Bureau in Jilin Province, China, this paper compared the outcomes of calculating the spatial structure indices based on Voronoi diagram (VD) and the outcomes of traditional method in which the number of the nearest neighbor trees was 4 (FT). Uniform angle index was taken as the first optimization target, mingling and neighborhood comparison were adjusted at the same time. Cutting trees were determined according to the spatial structure indices and critical distance, and the applicability of VD was evaluated. The results showed that mingling and neighborhood comparison calculated based on VD and FT were consistent, both belonged to effective data. However, mingling and neighborhood comparison calculated based on FT were lower than the outcomes of the VD, uniform angle index calculated based on VD differed significantly with those calculated based FT. Cutting trees determined according to spatial structure indices calculated based on VD and critical distance, mingling and neighborhood comparison were improved after thinning but uniform angle index was not. Spatial structure indices calculated based on FT were improved after thinning. Overall, mingling and neighborhood comparison calculated based on VD were reasonable while the error of uniform angle index was comparatively large. Therefore, when calculating the uniform angle index based on VD, other indices which were used for spatial structure distribution evaluation were needed to confirm the result.关键词
混交度/大小比数/角尺度/采伐木/Voronoi图Key words
mingling/ neighborhood comparison/ uniform angle index/ harvested wood/ Voronoi diagram分类
农业科技引用本文复制引用
郝月兰,张会儒,唐守正..基于空间结构优化的采伐木确定方法研究[J].西北林学院学报,2012,27(5):163-168,6.基金项目
林业公益性行业专项"我国典型森林类型健康经营关键技术研究"(201004002) （201004002）
"948"引进项目"森林多目标经营规划决策支持技术引进"(2008-4-60). （2008-4-60）
