在保证质量的前提下,为了加快对集体林的森林资源调查工作,我们于1984年5～7月,根据中央林业部颁发的《森林资源调查主要技术规定》及各种测树调查项目要求,在留坝火烧店林区,结合二类森林资源调查和编制马尾松生长量图表工作,利用按径阶抽取的48株树的胸径、中央直径和树高调查因子,编制了马尾松天然林形高表及形高蓄积速成表,并用回归方差分析和实地调查 In order to expedite the investigation of forest resources of collective forests on the premise of guaranteeing quality, in accordance with the “Main Technical Requirements for Forest Resources Surveys” issued by the Central Forestry Department and the requirements of various tree survey projects from May to July 1984, Combining with the investigation of the second type of forest resources and the compilation of the plot of growth volume of Pinus massoniana in the forest area of ​​fireworks in the retention dam, the natural forest height of Pinus massoniana was established by using the DBH, Table and form high-speed accumulation table, and use of regression analysis of variance and field surveys