Workout and Application of Stand Density Control Chart of Pinus kesiya var. langbianensis
Song Yong · Forest Inventory and Planning · 2002
One hundred and sixty_six sample plots of Pinus kesiya var. langbianensis at different site conditions, forest ages, crown densities, growth situations, in the two main distribution area of P. kesiya , ten counties of Simao prefecture and Xishuangbanna prefecture were set out to work out stand density control chart of this tree species. The stand density control chart worked out included 5 curves, namely equivalent height curve, namely equivalent diameter curve, maximum density curve, equivalent density curve, equivalent self thinning curve. According to the density control chart, the volume, degree of density, dominant tree height of the P. kesiya stand, the amount of intermediate cutting, and intermediate cutting time could be worked out, and the operation of intermediate cutting could be designed the average diameter at breast height and increment could be forecasted as well. The accuracy of the density chart was verified as 96 1% of equivalent height curve and 97 8% of equivalent diameter curve.