昆明和玉溪直干桉、蓝桉无性系的生长测定

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.

Clone-test Trial of Eucalyptus maidenii and E.globulus in Kunming and Yuxi

The clone-test trial sites of Eucalyptus maidenii and E Globulus were established in Kunming and Yuxi in 1994.The results showed that E maidenii growed faster than E globulus in both sites and the two species growed better in Yuxi than in Kunming according to the analysis of the data measured in 1999.The difference of growth characteristics of E maidenii was significant in both sites,but that of E globulus was not.In those clones maintained completely,the volume of 8 clones (5 E maidenii and 3 E globulus) exceed that of the control and of which 6(4 E maidenii clones and 2 E globulus ) exceed by 30% in Kunming.Among 7 clones of E maidenii tested,the volume of 6 clones surpassed the control and 2 clones were significant at 0 05 level,but none exceeded the control in E globulus clones in Yuxi. So far as present situation of economy and technology in Yunnan,it is more positive and feasible to select superior trees and then establish seed orchard.