The best-fit regression equation was set up for seedlings height , stem diameter and root growth of Pinus nigra through the method of stepwise regression .
苗高生长量与侧根鲜重关系最密切，地径生长量受根系鲜重影响最大。应用逐步回归法建立了苗高、地径生长量与根系生长关系的最优回归方程。
Pinus nigra