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为了逐步提高我区油松人工林的经营水平,开展定量间伐,我们根据林分内立木密度与胸径、树高、材积(蓄积)生长量及树冠面积的相互关系,以立木胸径和树冠面积为基础,编制了我区油松人工林经营密度管理表。一、基础数据的调查整理 1979年秋,我们以地区调查队和林场技术员为骨干,组成150人的调查队伍,共测设标准地87块,伐取标准木49株,标准地为正方形,面积0.5亩。标准地的测设采用罗盘仪定向,测绳丈量,闭合差不超过总边长的1/200。在样地内逐株实测胸径、树高、
In order to gradually improve the management level of Pinus tabulaeformis plantation in our district and carry out quantitative thinning, based on the relationship between the stand density and DBH, tree height, volume growth (volume) and canopy area, Basis, compiled my area pine plantation management density management table. First, the basic data survey In the autumn of 1979, with the regional investigation team and forest farm technicians as the backbone, a survey team consisting of 150 persons was set up, measuring a total of 87 standards and cutting standard wood 49 with a standard square and an area of 0.5 mu. The standard test set using compass orientation, measuring rope, closed less than the total length of less than 1/200. In the plots measured by the DBH, tree height,