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对乐昌含笑17个家系1~2年生树高、地径、主干通直度、树冠浓密度和叶片大小等生长指标和形质指标进行测定与分析,结果表明:2个生长指标和3个形质指标在家系间的差异均达到不同程度的显著水平;生长指标具有显著的家系×地点互作效应,而形质指标的差异不显著;所有指标在地点间差异都达到极显著水平(P<0.01)。早期树高和地径遗传力在0.60~0.86之间,受到较强的遗传控制。九曲水林场试验点所有参试家系的树高年平均生长量达0.90 m,地径年平均生长量达2.23 cm,是林分树高、地径年生长量最高的试验点,其中表现较好的家系有乐九4和乐九5;大坑山林场试验点稍次之,其中表现较好的家系有乐九4、乐九3、乐两15和乐两12;增城市林业科学研究所试验点年生长量较高的家系为乐两6。
The growth and morphological indexes of tree height, diameter, trunk straightness, canopy density and leaf size of 17 families in Lechang were measured and analyzed. The results showed that there were two growth indexes and three The difference of the quality index between the pedigrees reached a significant level in different degrees; the growth index had significant effect of pedigree × site interaction, but the difference of the quality index was not significant; the differences of all the indexes reached the extremely significant level (P <0.01). Early tree height and diameter of heritability 0.60 ~ 0.86 between, by a strong genetic control. The average annual tree height growth of all tested families in Jiuqu Shui Forest Farm was 0.90 m, and the average annual growth of soil diameter was 2.23 cm, which was the highest test point of tree height and diameter. Good family has Le Jiu 4 and Le Jiu 5; Tai Hang Mountain forest test site a little behind, which performed better families Le Jiu 4, Le Jiu 3, Le 2 15 and Le 2 12; Zengcheng Forestry Science Research The experimental point of the annual growth of the higher number of families Le 6.