许彦红. 数量化抚育间伐模型建立研究[J]. 西南林业大学学报, 2003, 23(2): 40-43. DOI: 10.11929/j.issn.2095-1914.2003.02.013
引用本文: 许彦红. 数量化抚育间伐模型建立研究[J]. 西南林业大学学报, 2003, 23(2): 40-43. DOI: 10.11929/j.issn.2095-1914.2003.02.013
Researches on Model Building for Quantificational Intermediate Cutting[J]. Journal of Southwest Forestry University, 2003, 23(2): 40-43. DOI: 10.11929/j.issn.2095-1914.2003.02.013
Citation: Researches on Model Building for Quantificational Intermediate Cutting[J]. Journal of Southwest Forestry University, 2003, 23(2): 40-43. DOI: 10.11929/j.issn.2095-1914.2003.02.013

数量化抚育间伐模型建立研究

Researches on Model Building for Quantificational Intermediate Cutting

  • 摘要: 概述了数量化回归模型Ⅰ的建模过程,并根据94块标准地调查数据,经分析筛选,确定林分平均高、每公顷株数、坡向、林分年龄4个调查因子为说明变量,建立以抚育间伐强度为基准变量的数量化抚育间伐模型,经回归效果和偏相关系数检验均极显著,表明林分平均高和每公顷株数对林分首次下层抚育间伐影响较大。精度检验表明模型系统误差较小,所建模型可以用于预估首次下层抚育间伐量。

     

    Abstract: The model building process for quantification regression model-Ⅰ was introduced.Four factors,i.e.average height of the stand,tree number per hecatare,aspect and average age of the stand were selected as explanatory variables based on investigation data of 94 sample plots in order to establish a quantification intermediate cutting model considering intermediate cutting intensity as criterion variable.Regression equation and partial correlation coefficient were tested and both were quite significant.It is found that the average height of the stand and tree number per hectare have a relative greater effect on intermediate cutting intensity.The systematic error of the model appears relatively lower through accuracy test.The newly erected quantification model can be used to predicate intermediate cutting quantity.

     

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