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在森林经营和森林调查工作中,林分年龄是关键性的因子。为了查定年龄往往要伐树,既浪费木材又浪费人力。本文探讨查定年龄的简易方法,所用材料为大兴安岭落叶松天然林Ⅲ地位级456株标准木。标准木年龄40—193年,胸高直径6—49厘米,树高9.6—29.2米。一、年龄和胸高直径的关系把456株标准木,按每10年进行归类,求出平均年龄、平均胸径和最大最小直径如
Stand age is a key factor in forest management and forest surveys. In order to determine the age tend to cut trees, both waste wood and waste of manpower. In this paper, the simple method of determining the age is discussed. The materials used are Grade III 456 standard woods of Larix gmelinii natural forest in Daxing’anling. Standard wood age 40-193 years, chest diameter 6-49 cm, height 9.6-29.2 meters. First, the relationship between age and thoracic diameter 456 standard wood, according to every 10 years to be classified, to find the average age, the average diameter at breast height and minimum diameter