论文部分内容阅读
对１９８４年在８ 个试点营建的９～１１ 年生火炬松种源林的调查分析，结果表明，主要经济性状存在着显著的种源差异，且具较高遗传力（其中４ 个试点的材积和干材干质量、树干通直度、木材基本密度达到５％ 差异显著水平，遗传力为０．４５～０．７８、０．４５～０．７６、０．５５～０．８３、０．４３～０．７７）。各类性状在种源区间表现出不同的变异趋势。利用其中４ 个点１９ 个共同种源的资料分析，表明各类性状的地点效应极显著，树高、材积、干材干质量的种源×地点作用显著，种源间对环境的适应性和反应亦不同。生长与产量性状间呈现极密切的正相关，但与材性、材质性状的相关性各试验点表现略有差异。采用材积和木材基本密度构建基本选择指数，分别为各引种区评定出培育建筑材工业林适宜的种源区和３ 个优良种源，其中最优种源的指数增益达到４．６５％ ～２３．４９％ 。
The investigation and analysis of 9 ~ 11-year-old Pinus taeda plantations in 8 pilot sites in 1984 showed that the main economic traits had significant provenances and high heritability (among them, Dry matter quality, tree trunk straightness, wood basic density reached a significant level of 5% difference, heritability 0.45 ~ 0.78,0.45 ~ 0.76,0.55 ~ 0.83,0.43 ~ 0.77). All kinds of traits showed different variation trend in the provenance range. The data analysis of 19 common provenances at 4 points showed that the location effect of all traits was extremely significant. The effect of provenances × sites of tree height, volume and dry weight was significant, and the adaptability to the environment and The reaction is also different. There was a very close positive correlation between growth and yield traits, but there was a slight difference in the correlation between growth and yield traits. Based on the basic selection index of timber volume and basic density, the suitable provenance areas and 3 elite provenances of cultivated timber were appraised in each introduced area, among which the exponential gain of the best provenances reached 4.65% ~ 23 .49%.