重庆地区不同桉树无性系生长对比试验及经济效益分析

Analyze on the Experiments of Contrast Growth Status and Economic Benefits of Different Eucalyptus Clones in Chongqing Areas

6个桉树无性系和1个对照品种(巨桉实生苗)在相同立地条件下的造林对比试验结果表明:6个桉树无性系和1个对照品种在本区生长均表现良好,不同桉树无性系之间、各无性系与对照之间的胸径、树高、单株材积生长量差异性显著,只是2年生时生长量差异性更大,6年生时生长量差异性变小;适宜本区发展的桉树无性系首选巨尾桉GU9,其次为尾巨桉DH32-29、尾巨桉DH33-27,在6年生时这3个无性系的单株材积量分别达到0.249875 m3、0.189 312 m3、0.188 103 m3,其种植经济效益显著优于其它无性系和对照实生苗。

Comparative experimental study on the afforestation of 6 Eucalyptus clones and the control group of Seedling Eucalyptus under the same site conditions. The results showed that 6 Eucalyptus clones and the control group of Seedling Eucalyptus showed good in this area, the difference between the Eucalyptus clones and the Eucalyptus clones with the control group on the DBH, tree height, tree volume growth significantly were very remarkable, and the difference on the 2 years old is bigger than the 6 years old. From the experiment to get the suitable clones of Eucalyptus urophylla GU9 first choice, and then Eucalyptus DH32-29 and Eucalyptus DH33-27 which development in this area, and the tree volume growth of the three Eucalyptus clones at 6 years old respectively reached 0.249 875 m3,0.189 312 m3,0.188 103 m3,and the economic benefit of planting was significantly better than other clones and the control group.