Growth in loblolly pine plantations as a function of stand density and canopy properties

摘要: Abstract Interrelationships between forest-canopy properties, stand growth, and Reineke's density index (SDI) were investigated for unthinned plots of a loblolly pine, growth-and-yield study. Gross, periodic-annual increment (Iv) mean-tree, gross, (Imv) calculated the intervals 17, 22, 27, 32, 37 years age. Data to calculate canopy variables available only after age 22. Regression analysis indicates that second-degree polynomial SDI is statistically related both growth during first two measurement but not last two. The shape significant equations generally agreed with conventional growth-growing stock relationships, Iv, adjusted SDI, decreased significantly Leaf area (L) foliage (F) linearly each period. While relating F different periods, intercepts fitted L plantation Mean-live-crown ratio (Cr) was all exception depth (Cd) at Significant multiple-linear regression models found properties one exception. With exception, Iv interval Cr intervals. Mean, those described structure. F, overall average value in these pine plantations, probably leading systematic reduction Although relations plantations relationships emphasize importance early management maintain vigorous crowns rates as