一假使说树干的中心存在着一条干轴的话,那么沿树干干轴纵向剖开即得树干的纵切面,而从这个纵切面则会展示出树干曲线的轮廓.树干的体积(材积)可视为树干曲线以干轴为轴的旋转体,所以树干曲线的研究吸引学者们的高度关切。由于影响树木生长的因素繁多,时空宏博,因而这条曲线也就变化莫定,导致研究上的困难,从而出现了许多干形曲线的研究报导。 If one says that there is a dry axis in the center of the tree trunk, then the longitudinal section of the tree trunk is cut longitudinally along the trunk axis and the outline of the trunk curve is shown from this longitudinal section. The volume (volume) of the trunk is visualized Therefore, the study of trunk curve attracts scholars’ great concern. Due to the variety of factors that affect the growth of trees, the time-space macro, so this curve will be uncertain, leading to research difficulties, resulting in a number of dry curve research reports.