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通过对直杆蓝桉 6个种源 57个家系对比试验 ,其树高、胸径、成年态叶转化率差异不显著 ;但直干蓝桉树高胸径生长与土壤A层相关密切 ,相关系数达 0 .82 0 9以上 ,与B层、C层相关不密切 ;而成年态叶转化率与A层土壤相关不密切 ,与B层、C层土壤厚度相关密切。综合得出直干蓝桉在土层厚度 10 0cm以上 ,其中A层应在 4 0cm以上 ,树高的生长量达 2m以上、胸径生长量达 2cm以上。
The results showed that there was no significant difference in tree height, diameter at breast height and leaf morphogenesis rate among 57 pedigrees of 6 provenances of Eucalyptus globulus. However, the correlation between the height and DBH growth of Eucalyptus grandis was close and the correlation coefficient was 0 .82 0 9, which is not closely related to the B and C layers. However, the conversion rate of adult leaves is not closely related to the A-layer soil, but closely related to the B and C soil thicknesses. The results showed that the thickness of Eucalyptus globulus was more than 10 cm in the soil layer, in which the A layer should be above 40 cm, the height of tree height above 2 m and the DBH growth rate above 2 cm.