Influences of Different Slope Positions and Afforestation Density on Growth of Four Eucalyptus

Taking four Eucalyptus clones DH32-26(D26), DH32-28(D28), DH32-29(D29) and GL-UG9(G9) as materials, the experiment was carried out to investigate the effects of different slope psitions and afforestation density on growth of four Eucalyptus. Results show that under the same slope positions, there were no differences between tree height and diameter at breast of four Eucalyptus, and big difference on the tree height and diameter at breast of upper slope under different afforestation density; Under the same afforestation density, there were no differences between tree height and diameter at breast of four Eucalyptus; in 2.0×3.0 m afforestation density, there were differences between tree height and diameter at breas(P 0.05); There were significant differences between tree height of same clone DH32-28 and DH32-29 under the different afforestation(P0.05), and no differences on diameter at breast height, and a different slope of tree height and diameter at breast height difference was not significant; Different afforestation density and different slope of DH32-26, GL-UG9 clones of tree height and diameter at breast height had no significant difference.