福建省马尾松优树自由授粉子代变异及其分析

对１０年生马尾松优树自由授粉子代的树高、胸径、材积和通直度性状变异的研究结果表明，２６３个优树家系中有２６．６２％材积生长超过对照１０％以上．其中龙岩地区优树的子代生长表现最佳．同地区不同林分的优树子代有很大差异，林分间平均变异系数大于林分内家系间的平均变异系数．在不同海拔林分选择的优树，除戴云山南麓海拔６００～７００ｍ左右优树子代生长表现较好外，其它海拔点的子代无明显差异，且都差于对照．优树子代生长性状与树干通直度之间存在显著正相关，表明可望同时在生长性状和干形上得到改良

A Study on Variations of Plus Tree Open-pollinated Progenies of Masson Pine in Fujian Province

Variations in height,diameter at breast height,stem volume and stem straightness of the open-pollinated pregenies of 263 plus trees of masson pine ( Pinus massoniana Lamb ) were studied The results showed that the stem volumes of 26 62% of the families were more than 10% over CK There was a great difference among pregenies of plus trees (PPT) come from different regions and the PPT come from Longyan region were the best There were also evident differences among PPT come from different stands within regions Average coefficient of vavariation among stands was bigger than that among families within stands The growth of PPT come from different elevations was less and no evident difference among stands except that PPT from the south of Daiyun Mountain at elevation 600￣700m were better Significant positive correlations between growth traits and stem straightness showed that the form of stem could be improved while elite masson pine on growth was selected