摘要
对长白山地区水曲柳天然林和人工林平均优势木的树干解析材料进行了测定。结果表明:水曲柳天然林各性状早、晚期相关系数均随年龄的增大而增大,在幼龄期相关系数增长率较大,25a后趋于平稳。人工林各性状早、晚期相关系数变化规律与天然林相似,15a后相关系数增长率趋于平稳。综合分析水曲柳天然林和人工林不同性状的生长变异规律,早、晚期相关程度及选择效率,初步确定水曲柳天然林和人工林早期最佳选择年龄分别为25a和15a。早期选择应以胸径为主要指标。
Stem analysis of average dominant tree from natural and artificial forests of Fraxinus mandshurica in Changbai Mountains was made. Result shows that the correlative parameters for every characteristic of F. mandshurica natural forests from young to mature become higher with tree age prolonging, which exhibits a higher growth rate at young stage and then a steady change after 25 years. The similar changing regularity was also found in F. mandshurica artificial forests, which presents a stable change in growth rate after 15 years. The optimal selection ages are determined to be 25 years for natural forests and 15 years for artificial forests in terms of the synthetical analysis of the variation rules of every characteristic, the correlativity between young and mature forests as well as the selective efficiency.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2007年第2期20-21,28,共3页
Journal of Northeast Forestry University
关键词
水曲柳
早期选择
最佳选择年龄
Fraxinus mandshurica
Early selection
Optimal selection age
