对建立一元立木材积模型的两种常规方法进行了深入分析,提出了以树高—胸径模型为基础的二阶回归估计方法。利用该方法既可以提高模型切合性能,又能有效控制模型的拟合误差,并以西藏自治区的四旁树一元立木材积模型为例进行了说明。 Two kinds of routine methods of establishing one-dimensional wood volume model are deeply analyzed, and a second-order regression estimation method based on tree height-DBH model is proposed. The method can not only improve the fitting performance of the model, but also effectively control the fitting error of the model, and take the example of the quadrilateral tree timber model of Tibet Autonomous Region as an example.