Study on Parameters of Target Tree in Chinese Fir Plantation

Establishment of 51typical sample plots with different aged artificial plantations of Cunninghamia lanceolata was carried out in Zhejiang province.126 dominant trees and 3 sample trees were selected for determination of DBH, height and crown diameter.Analysis demonstrated that the best regression equation for relationship between DBH and height of dominants was Y=0.361 8X+4.497 9, R2=0.796 5.The best regression equation for correlation between DBH and crown diameter was Y=0.137 9X+0.858 9, R2=0.881 6.Stem analysis on 3 sample trees showed that the maximum tree height, DBH, and volume growth was at 10-year, respectively 5.278 7%, 15.069%, and 25.895%, and only 0.273 3%, 0.186 9%, and 0.921 7% at 50-years.Parameters such as the development stage division, reasonable density and the number of target trees of Chinese fir plantation were suggested.