The Effects of Different Mixed Treatments on the Growth of Eucalyptus urophylla and Acacia mangium Mixed Stands

The growth of mixed stand of Eucalyptus urophylla and Acacia mangium with different mixed proportion were investigated in 3 year-old forest.The results showed that in the density of 1727·hm-2,the average DBH,height and single-tree volume were 9.27cm,14.50m,0.0514m3 respectively.And the mixed stand of Eucalyptus urophylla and Acacia mangium has the mixed proportion at 1∶1.6 and the above indexes were 13.50cm,15.97m and 0.1098m3,which increased 45.6%,10.1%,113.6% higher than that of Eucalyptus urophylla pure stand.The mixed stand with 98.00m3/hm2 forest volume was 10.3% higher than the pure stand with 88.83m3/hm2 forest volume.The different mixed treatments have significant difference in the average DBH,height,tree volume and ratio of diameter to height.