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应用多个聚集度指标和Iwao,Taylor等的回归分析法对落叶松八齿小蠹Ips subelongatus Motschulsky坑道的垂直分布型进行了研究。结果表明:落叶松八齿小蠹坑道数量与落叶松树干不同高度变化成线性关系,拟合的直线方程为y=-10.867x+92.884;落叶松八齿小蠹坑道基本属于均匀分布;坑道的分布与落叶松立木阴面和阳面关系不大。最后确定了不同落叶松八齿小蠹坑道密度下的最适抽样数。
The vertical distribution patterns of the Ips subelongatus Motschulsky trenches were studied using multiple aggregates index and regression analysis by Iwao, Taylor et al. The results showed that there was a linear relationship between the number of larches and the height of Larix principis-rupprechtii, the linear equation of fitting was y = -10.867x + 92.884; Distribution and larch stand side of the sun and the sun is not significant. Finally, the optimal sampling number under different larch tunnel density was determined.