摘要
本文对３０年生９０株人工长白落叶松树干解析生长变异及早期预测进行了研究，结果表明，树高、胸径、材积的变异随着年龄增大而减小，１４～１８龄是生长变异由剧烈分化到趋向稳定的转折年龄，此时树高、胸径、材积等的幼龄至成熟龄相关达极显著水平，选择效率也处在较高水平，确定长白落叶松早期选择年龄为１４年。
In this article, 90 trees of artifical Lalix olgensis growth for 30 years are studied in growth variation of stem analysis and calculation in early period. The study result shows that the height, breast diameter and timber volume from young growth to mature forest correlation have reached extremely remarkable level, as well as the selection efficiency is at the higher level and the selective age of Larix olgensis in early period is defined for 14 years.
出处
《林业科技》
北大核心
1996年第4期15-17,共3页
Forestry Science & Technology
关键词
长白落叶松
生长变异
选择年龄
选择效率
Larix olgensis
Growth variation
Young to mature forest
Correlation best Selection age
selective efficiency
