Effect of Stand Density on Community Structure and Ecological Effect of Eucalyptus urophylta×E.eamalducensis Plantation

Abstract:

The community structure and water holding capacity of litter and soil of Eucalyptus urophylta×E. eamalducensis plantations under different management densities in Yong’an City were studied. The results showed that the management density obviously affected the plantation structure, which had significant correlations to DHB and tree height, with correlation coefficient of -0.99 and -0.93, respectively, and that to stand volume with r=0.84．The effects of densities on species diversities from shrub layer to herb layer were different, which had significant correlation to shrub layer with r=0.94, and poor correlation to herb layer with r=-0.52. The species composition of undergrowth layer were great different under 5 different densities, and the vegetation yield under low density was the biggest．The litter maximum water holding capacity had significant correlation to stand densities with r=0.94．

Key words:Eucalyptus urophylta×E.eamalducensis;Density;Diameter class structure;Diversity;Water holding capacity