木材科学与技术2026，Vol.40Issue(1)：11-18,8.DOI:10.12326/j.2096-9694.2025054
3个家系落叶松木材生长轮宽度与密度径向变异
Radial Variation of Growth Ring Width and Density of Larch Wood from Three Families
摘要
Abstract
This study systematically analyzed the growth ring width and density profile of larch wood from three families(Larix kaempferi 3×L.gmelinii 2,L.kaempferi 5×L.olgensis 77-3,L.kaempferi 5×L.gmelinii 9)from a progeny test plantation established in 1993 at Qingshan Forest Farm,Linkou County,using the soft X-ray imaging technique.During the growth cycle,all families showed rapid decrease in growth ring width during the first 10 years and then leveled off.L.kaempferi 3×L.gmelinii 2 demonstrated the largest mean annual growth ring width,indicating the fastest growth rate.The latewood percentage exhibited an initial rapid increase in the first 10 years and then displayed a fluctuating upward trend.L.kaempferi 5×L.olgensis 77-3 showed the best stability in latewood percentage.The average earlywood density decreased slightly in the initial growth stage,increased significantly from the 6th to the 8th growth ring,and decreased again after the 15th growth ring.The average latewood density increased rapidly in the first 10 growth ring and remained stable thereafter,resulting in the average density of growth rings showing an initial increase followed by a slight decrease.L.kaempferi 3×L.gmelinii 2 exhibited the highest latewood density,while L.kaempferi 5×L.olgensis 77-3 had the lowest variation coefficients for earlywood and growth ring density,indicating superior stability between growth rings.This research provided theoretical and technical supports for selecting superior families and targeted breeding of larch.关键词
杂种落叶松/家系/生长轮/密度/径向变异Key words
hybrid larch/families/growth ring/density/radial variation分类
农业科技引用本文复制引用
向娥琳,杨晨,李珠,蒋佳荔,周永东..3个家系落叶松木材生长轮宽度与密度径向变异[J].木材科学与技术,2026,40(1):11-18,8.基金项目
农业生物育种国家科技重大专项课题"纸浆材与结构材用松树木材性质与质量评价"(2023ZD0405905). （2023ZD0405905）
