1994年在昆明、玉溪两试验点营造的直干桉和蓝桉无性系测定林 ,根据 1999年的生长数据分析后看出 :两地的测定林都是直干桉比蓝桉生长好 ,玉溪两个树种的生长都比昆明好。在直干桉无性系中两试验点的生长性状差异均达显著或极显著水平 ,而蓝桉无性系在两试验点都不显著。在昆明试验点测定林保存完好的无性系中 ,直干桉有 5个、蓝桉有 3个无性系的材积超过对照 (实生木 ) ,其中超过 30 %有 6个 (直干桉 4个 ,蓝桉 2个 )。玉溪试验点参试的 7个直干桉无性系有 6个的材积超过对照 ,其中材积显著大于对照的有两个 ;蓝桉 3个无性系中没有1个超过对照。根据云南省目前的经济技术水平 ,走选优、建园的遗传改良途径更为积极稳妥 According to the 1999 growth data analysis, the direct and eucalyptus clones established in 1994 and 2002 in Yuxi and Kunming, respectively, showed that the measured forests in both plots were better than those in Eucalyptus globulus, The growth of both species is better than Kunming. The differences of the growth traits between the two test sites in the direct and dry Eucalyptus clones reached significant or extremely significant levels, but the Eucalyptus globulus clones were not significant at the two test sites. Among the clones with well-preserved forest in Kunming, there were 5 straight-eucalyptus and 3 clones of E. grandis than the control (real wood), of which 6 were over 30% (4 straight-eucalyptus, Eucalyptus 2). There were 6 positive clones of 7 straight Eucalyptus clones tested in the test site of Yuxi, of which the volume was significantly larger than that of the control, and none of 3 clones of E. grandis exceeded the control. According to the current level of economic and technological level in Yunnan Province, it is more active and safe to follow the path of genetic improvement