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根据1977年底的情况对树林年代学进行详细观察,简述树木年代学的发生发展情况、强调树林年代学中所需利用的资料——生长季节性、生长的一个或若干个环境因子的制约性.历年各因子的变化和生长量的变化的独特性、同样生态学特征的树种上和广大地区范围内各环境因子呈现的相同性.讨论了关于资料采集技术和方法,测定方法和材料整理、树木年代学指标计算、资料呈报形式等问题.除年轮宽度外,还要经常测定早晚材之间的比值,年轮范围内木材密度的变异性.对树木年代学的资料来说,必要的条件是按一株树的两个半径测
According to the situation at the end of 1977, the author has made a detailed observation of the tree chronology, briefly described the occurrence and development of the tree chronology, and emphasized the data needed for the use of the tree chronology - the restriction of one or several environmental factors of growing seasonality and growth The uniqueness of the change of all factors and the change of growth in the past years, the similarities of the environmental factors in the species with the same ecologic characteristics and in the vast area, discussed the methods and methods of data collection, Tree chronology index calculation, data reporting and other issues.In addition to the annual ring width, but also often determine the ratio between morning and evening wood, woody ring within the range of variability of the data.For the chronological data, the necessary The condition is measured by two radii of a tree