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对赤桉４批试验林４２个种源４～８年生幼林的生长适应性、抗逆性及其遗传稳定性进行分析研究结果表明，①赤桉种源具有广泛的适应性，幼苗成苗率和造林成活率均在８０％以上，４～８年生时幼林保存率从９２．１％降至６０％，适宜在我国中亚热带东部沿海地区生长，②种源间耐寒性差异很大，澳大利亚南部和高纬度种源耐寒性较强，北部种源抗寒性较差，种源抗寒性以幼龄期最差，随着树龄的增加，抗寒性能逐年增强，③种源的抗风性在很大程度上取决于树冠时量、叶面积大小和树本的高径比，凡树冠庞大、叶量多、叶面积大、在径比失调的种源抗风力差，④不同种源树高、胸径和材积生长的早晚期年年相关和秩次相关都十分紧密，３年生时，生长性状的群体遗传结构已经稳定，并可作为衡量６～８年生种源生长的优劣。
The growth adaptability, resistance and genetic stability of 4 ~ 8-year-old young plantations of 42 provenances of Eucalyptus urophylla were studied. The results showed that: ① Eucalyptus urophylla had wide adaptability, seedling emergence rate And afforestation survival rates are above 80%, 4 to 8 years old when the young forest conservation rate from 92.1% to 60%, suitable for the growth of the coastal areas in the eastern subtropics of China, ② cold hardiness vary greatly between species sources, southern Australia And high-latitude provenance were more resistant to cold, cold hardiness was worse in northern provenance, and cold hardiness in provenance was the worst in juvenile period. With the increase of tree age, cold-hardness increased year by year. Depends largely on the amount of canopy, the size of the leaf area and the height-diameter ratio of the tree, where the canopy is large, the amount of leaves is large, the leaf area is large, The correlation between height, DBH and volumetric growth was close and rank correlation was very close. The population genetic structure of growth traits was stable at 3 years old, and could be used as a measure of the growth of 6-8 years old provenances.