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为了选育乐昌含笑优良种源,对2次6~7年生乐昌含笑多点种源试验林数据作统计分析,方差分析结果表明:3个生长性状及4个形质性状种源间,除树干通直度外均存在显著或极显著差异,地点间差异均达极显著水平,种源与地点互作仅第2次试验的3个生长性状和冠幅间差异达显著水平;树高、胸径、材积、树干通直度、叶片大小、树冠浓密度和冠幅间的差异达到极显著水平,生长性状与形质性状间存在显著或极显著正相关;各性状种源遗传力处于中等水平;运用主成分分析法及“年生长量”指标值对2次种源试验的生长性状数据做综合分析,采用Francis-Kannenberg模型分析法选择出优良种源6个,分别为南雄江头、始兴刘家山、南雄帽子峰、始兴都亨、仁化长江和江西龙南,材积增益达11.95%~41.03%。
In order to select the best provenances in Lechang, the data of 2 multi-point trial forests of Lechang in 2 ~ 7 years were statistically analyzed. The results of variance analysis showed that there were three growth traits and four traits of provenances, Except for the trunk straightness, there were significant or extremely significant differences among the locations, with significant differences between the three growth traits and the crown width at the second experiment of provenance and site interaction. The height of the tree height , The differences of DBH, volume, trunk straightness, leaf size, canopy density and crown width reached the extremely significant level, and there was a significant or extremely significant positive correlation between growth traits and quality traits. The heritability of each trait was moderate Level. Using the principal component analysis method and the index of “annual growth” to make a comprehensive analysis of the growth traits data of the two-year provenance experiment, six excellent provenances were selected by Francis-Kannenberg model analysis, which were respectively Nanxiong Jiangtou, Shixing Liu Jiashan, Nanxiong hat peak, Shixing capital Hang, Renhua Yangtze River and Jiangxi Longnan, timber volume gain of 11.95% ~ 41.03%.