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本文报道的是广东雷州七个桉树杂种表型分化的调查结果:七个桉树杂种的叶型分化明显,窄叶和宽叶型的植株数均较少,中间型的株数最多;它们的树皮颜色多变,树皮剥落的情况不一致,有的剥落,有的不剥落,其中树干上部树皮剥落的,中间型的株数占多数;植株之间的生长相差显著,最大植株的树高和胸径同最小植株的相较,分别为1.5～3.1和2.3～4.7倍,明显地表现出杂种优势的特性。对桉树杂种优势的利用问题也作了讨论。
This paper reports the findings of the phenotypic differentiation of seven Eucalyptus species in Leizhou, Guangdong Province. The seven eucalyptus hybrids showed obvious leaf differentiation with narrow and broad leaf types with fewer plants and the largest number of intermediate plants. Their bark Color changeable, bark exfoliation inconsistent, some peel, and some do not peel, where the upper part of the trunk bark peeled off, the majority of the number of intermediate type; significant difference between the growth of plants significant, the maximum plant height and diameter at breast height Compared with the smallest plant, they were 1.5-3.1 and 2.3-4.7 times, respectively, which clearly showed heterosis. The utilization of eucalyptus heterosis is also discussed.