Foliage biomass distribution of loblolly pine as affected by tree dominance, crown size, and stand characteristics
1998
Xu, M. | Harrington, T.B.
Horizontal and vertical distributions of foliage biomass of loblolly pine (Pinus taeda L.) were analyzed for 30 trees in a plantation that had developed 12 years after several site-preparation treatments in the Georgia Piedmont, U.S.A. Regression analyses indicated that foliage biomass of individual branches increased with branch diameter and with branch relative height. Weibull models were used to characterize foliage biomass distributions and analyses revealed that branch foliage biomass distribution varied with branch-level, tree-level, and stand-level variables. Results indicate that the proportion of foliage biomass occurring within the inner crown increased with branch diameter and relative height. For trees of greater dominance, branch foliage biomass was more evenly distributed across the branch length. With increasing crown ratio of a tree, branch foliage biomass shifted from the inner to the outer crown. For trees of greater dominance, the vertical distribution of crown foliage biomass was more even, whereas less dominant trees shifted their foliage to the top of the crown. For trees of similar dominance, crown foliage tended to shift upward as stand leaf area index increased.
显示更多 [+] 显示较少 [-]