【摘要】 通过对黑龙江省东南部人工落叶松林分直径结构的研究认为,随着落叶松人工林林分平均胸径的逐渐增加,其直径正态分布曲线偏度、峰度、最大相对胸径值、相对平均胸径值在各径阶株数累积分布曲线上的位置均呈现出减小的趋势,而最小相对胸径值呈现出增大的趋势。更多还原

【Abstract】 From the analysis and normal distribution function simulated study on the diameter distribution of larch plantations in mudanjiang.The results show that the skewness、kurtosis、comparative average diameter 、comparative maximum diameter presented an increasing tendency,and the comparative minimal diameter presented a decreasing tendency with increased stand ages.更多还原