摘要
对30年生人工林90株长白落叶松(Larix olgensis)树干解析生长和材性变异及早期预测的研究结果表明:树高、胸径、材积的变异随年龄的增大而减小,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—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:初选10a,抉选14a.基本密度和管胞长度的变异在10龄时趋于稳定,此时基本密度的幼—熟龄相关也达显著水平,选择效率处于分布的峰顶.所以,确定10龄为基本密度的最佳选择年龄.管胞长度幼—熟龄相关不稳定.
90 trees of 30-year-old plantation of larix olgensis were studied in stem-analysis, variation of wood properties and early prediction. The variation ofheight, DBH and volume decreased with age growing. Age 14 - 18 is key age ofgrowth vcriation from severesy to,steadily, meanwhile the early-late correlationsof height, DBH and volume are significant (P <0. 01) and selection effciency is athigh level. The early selecting age of Larix olgensis was decided as 10 year-oldin first selecting, 14 year-old in final selecting. Variation of density and lengthof tracheid tends to being stable at age of 10, and at this time the early-latecorrelation is so significent level(p<0. 05) and selecting efficiency is at the top ofdistribution. Therefore 10 year-old was decided as best selecting age in density,and the early-late correlation of length of tracheid is not steady.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1996年第5期12-18,共7页
Journal of Northeast Forestry University
基金
国家"八五"科技攻关项目"落叶松建筑材
纸浆材良种选育"的部分内容
关键词
长白落叶松
生长变异
材性变异
早期选择
Larix olgensis
Growth variation
Wood properties variation
Early-late correlation
Selecting efficiency
Best selection age
