针阔混交异龄林林分优势高的确定方法

Stand Dominant Height Estimation of Uneven-aged Mixed Coniferous and Broad-leaved Stands

基于广东省59块针阔混交异龄林一类固定样地实测数据,采用7种方法计算林分优势高,对7种计算方法获取的林分优势高进行相关性分析和差异分析,并建立了林分优势高和林分平均高的线性模型。结果表明,针阔混交异龄林的7种林分优势高间的相关系数均超过0.9;根据差异性分析结果和调查、计算简单的原则,确定不分树种取最大3株优势高的算术平均作为针阔混交异龄林的林分优势高;林分优势高与林分平均高之间的关系方程为Y=0.948 9X+4.133 7,决定系数R^2为0.656 3,具有良好的线性关系。

With 59 field plots data of uneven-aged mixed coniferous and broad-leaved forests in Guangdong Province,seven computational methods were used to obtain stand dominant height in the article,meanwhile the correlation analysis and pair-T test among seven calculated stand dominant height was carried out.Moreover,the relationship between stand dominant height and stand mean height was analyzed by a linear model.The results showed that the correlation coefficients between different stand dominant height estimates were higher than 0.9,on the basis of difference test conclusions and principle of convenient investigation and calculation,average height of the three max dominant trees heights was defined as stand dominant height of uneven-aged mixed coniferous and broad-leaved forests.The fitting equation between stand dominant height and stand mean height was Y=0.948 9X+4.133 7,and the coefficient of determination R2 was 0.656 3.That mean that there was a good positive linear relationship between the stand dominant height and the stand mean height.