High-density tests of E. urophylla × E. grandis clones with six different kinds of afforesta- tion densities including the lowest density of 1666 strains/hm^2 which is common to be used in current production of eucalypt and five kinds of higher densities were done to analyze the growth effect of stand density in the 2-year-old test forest. The results showed that there were very significant differences a- mong stand growths of different densities. The higher the density was, the lower stand height, DBH and individual volume were, while the stand accumulation increased with the increase of the density, which were similar to the results of another density tests of eucalypt. But the effect of stand growth was set out earlier probably because the density was too high, but the final issue remaind to be studied.%以当前桉树生产上常用的造林密度1666株／hm^2为试验的最低造林密度，与5种更高造林密度作为构成本试验的6种不同造林密度的高密度试验，分析尾巨桉（Europhylla×E.grandis）试验林2年生时的林分密度生长效应。结果表明，不同密度处理间的林分生长量有极显著差异，密度越大，其林分树高、胸径、单株材积越小，林分蓄积量则随密度的增加而增大，这与其它许多桉树密度试验结果相似。但林分生长效应提早，可能是林分密度过高缘故，最后结果有待继续观测研究。
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