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通过对大、小兴安岭6块天然兴安落叶松(Lirix gmelinii)林18株解析木的研究表明:兴安落叶松不同地点、之间在生长性状上有差异.兴安落叶松天然林树高、胸径和材积的变异随年龄的增大而减小,25a(大兴安岭)和12a(小兴安岭).是生长变异曲剧烈分化到稳定的转折年龄,此时树高和胸径与晚期材积的相关性达到极显著水平、选择效率也达最高,所以25a(大兴安岭)和12a(小兴安岭)是兴安落叶松早期选择的最佳年龄.早期选择应以树高为主要指标、胸径为辅助指标.可用25a(大兴安岭)和12a(小兴安岭)时的树高和胸径预测36年生时的材积.
Based on the analysis of 18 wood species from 6 natural Lirix gmelinii forests in the Greater and Xiaoxing’an Mountains, the results showed that there was a difference in growth traits between different locations of Larix gmelinii forest. The variation of tree height, DBH and volume of natural Larix gmelinii forest, 25a (Daxinganling) and 12a (Xiaoxing’anling) were the age at which violent differentiation of growth curve shifted to a stable turning point. At this time, the correlation between tree height and DBH reached a very significant level, and the selection efficiency 25a (Daxinganling) and 12a (Xiaoxing’anling) are the best ages for the early selection of Larix gmelinii.The early selection should be based on the tree height as the main index, When the tree height and DBH predict 36-year-old volume.