Survival Rate and Growth Effect of Different Slope Aspect and Slope Position on Eucalyptus robusta
The effects of different slope aspect and slope positions on the survival rate,tree height and DBH of Eucalyptus robusta were analyzed.The afforestation experiment was carried out with Eucalyptus robusta tissue culture seedlings.Taking the survey data of 1-year-old Eucalyptus robusta plantation sam-ple plot as the research object,the afforestation effect was investigated,the slope aspect and slope posi-tion of the sample plot were recorded,the tree height and DBH of each tree were measured.The results showed that the effect of slope aspect or the interaction between aspect and slope position on the survival rate,tree height and DBH of Eucalyptus robusta were stronger than that of slope,and the slope aspect had the greatest effect on the survival rate and growth of Eucalyptus robusta;different slope aspect had a significant impact on the survival rate and the growth of Eucalyptus robusta,and the survival rate was most affected by slope position;different slope position had no significant impact on the survival rate and the growth of Eucalyptus robusta,and the slope aspect had little impact on the survival rate,tree height and DBH;from sunny slope,semi-sunny slope,semi-cloudy slope and cloudy slope,the light gradually weakened,the survival rates of Eucalyptus robusta were 90.83%,84.18%,77.34%and 75.95%re-spectively,the tree height decreased from 8.59 m to 7.57 m,and the DBH decreased from 6.26 cm to 5.43 cm;from sunny slope to cloud slope,the survival rate,tree height and DBH of Eucalyptus robusta showed a gradual decreasing trend,but the change trend with different slope positions was not obvious,which showed the minimum value in the middle slope.
terrain factorilluminationwater and fertilizer distributionsurvival rategrowth
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