杉木优良家系子代测定林研究初报

Preliminary Report on Study of Progeny Test Forest over Elite Family of Cunninghamia lanceolata (Lamb.) Hook.

摘要:

杉木优良家系子代测定表明:各家系从苗期开始就存在显著差异,参试的55个家系中,与对照相比,有显著差异的有16个,但仅此进行无性系淘汰是不可行的;进行树高生长量与年龄相关分析,早期选择是可行的,早期选择的年限至少在6a以上;根据造林16a时的树高、胸径实测数据进行方差分析,结果表明:家系间树高、胸径差异显著。与对照相比,树高、胸径同时达到极显著的有11个家系,占参试家系的20%;所选11个家系可作为营建杉木二代园材料,亦可作为优良材料进行推广应用。

Abstract:

Progeny test forest over elite family of Cunninghamia laceolata (Lamb.) Hook.shows that each family exist great differences beginning from seedling stage. There are 16 families with great differences among the tested 55 families compared with control plot, however, it is infeasible to eliminate through clones; while it is feasible to select in early stage with annual limitation at least 6 years above based on related analysis about tree height growth and year; result shows that the tree height and DBH among the families have great differences according to equation analysis on actual tested data over the tree height and DBH during 16 years affrostation. There are 11 families reached obvious differences with both tree height and DBH at the sanme time accounting for 20% among the tested families; what 11 families selected can be used as materials for establishing the second generation plot for Cunninghamia laceolata and also can be improved materials for extension and application.