【摘要】 研究贵阳二环林带9个主要经济树种冠幅与胸径的相关关系,选择一元一次方程对其进行拟合,根据不同树种冠幅—胸径方程,推算其在林冠郁闭度为1.0时的造林密度,并制作林分密度表,探讨二环林带合理密度及其变化规律。更多还原

【Abstract】 The correlations between the crown diameter and DBH(the diameter at breast height) in 9 main economic tree species were studied and it was stimulated by selecting a linear equation.According to the equation of the crown diameter and DBH in different tree species,their afforestation densities when the canopy closure extent was 1.0 were predicted,the stand density tables were made and the reasonable density of the second-round forest belt and change laws were discussed.更多还原