次生林林木分级指数及其应用.pdfVIP

- 森林与环境学报　 2017,37(1):81 87 第37卷 第 1期 Journal of Forest and Environment 2017年1月 DOI:10.13324/ ki.jfcf.2017.01.013 次生林林木分级指数及其应用 钱升平,胡　 晟, 吕飞舟,朱光玉, 吕　 勇 (中南林业科技大学林学院,湖南长沙410004) 摘要:为了更加科学、准确的评价林木在林分中的位置优劣状况,为林木分级提供新方法。以芦头国有林场青冈栎次生林 为例,提出林木分级指数概念,筛选得到大小比数、健康指数、空间密度指数、混交度、交角竞争指数5个指标来构建林 = - + + - 木分级指数计量模型,基于层次分析法,得到林木分级指数的计量模型为TCI 0.3683(1 U) 0.279 2H 0.147 9(1 UCI) + - + 0.1364(1 D) 0.068 2M。采用等间距法得到每个林木等级的林木分级指数值分别为:优势木(0.75~1],亚优势木 (0.5~0.75],中庸木(0.25~0.5],被压木(0~0.25]。运用指数计量模型计算得到芦头国有林场2个样地的林木分级指数 均值分别为0.602 1和0.5834,表明2个样地优势木和亚优势木均较多,林木总体生长状况较好。 关键词:次生林;林木分级指数;大小比数;芦头国有林场 - - - 中图分类号:S757 文献标识码:A 文章编号:2096 0018(2017)01 0081 07 Tree classification index of secondary forest and its application QIAN Shengping,HU Sheng,LÜ Feizhou,ZHU Guangyu,LÜ Yong (Academy of forestry of Central South University of Forestry and Technology,Changsha,Hunan410004,China) Abstract:In order to evaluatethe strengths and weaknesses situation of trees in the forest stand more scientificly and accurately,a new methodfor trees classificationwasprovided. It took the Cyclobalanopsis glauca (Thunb.) Oerst. secondary forest in Lutou forest farm as an example,put forward tree classification index concept,screened out neighborhood comparison,healthy index,spatial density index,mingling index,angle competitionindextobuildtreeclassificationindex measuringmodel basedonAHP.Asaresult, = - + + - + - + thetree classification index measuring model was TCI 0.368 3(1 U) 0.279 2H