Study on the Growth Effect of Eucalyptus urophylla ×E.grandis Plantation with Different Continuous Planting Rotation

This thesis adopted the time specific and fixed position method to investigate synthetically the Eucalyptus urophylla×E.grandis plantation during 7～43 months old on the growth and development characteristics.The research results showed:the mean height,DBH,the individual volume and the growing stock increased distinctly with the increasing of stand ages.The E.urophylla×E.grandis wood manifested the strong-growing characteristics of early stage.The total growth of the height,DBH and the growing stock of E.urophylla×E.grandis didn't descend with planting generation increasing.But the growth characteristics of E.urophylla×E.grandis plantation were affected by continuous-plating rotation,and the current increments had displayed the declining-trend.