Title: Biomass of Four Hardwoods from Lower Piedmont Pine-Hardwood Stands in Alabama
Abstract: Biomass data was recorded for 73 trees growing in mixed natural oak-pine stands on Lower Piedmont sites near Auburn, Alabama, during a study of the feasibility of harvesting southern hardwoods by extraction using a Rome TXH Tree Extractor.Hawested trees included sweetgum, hickory (mockernut and pignut), southern red oak, and white oak trees measured from 4 to 11 inches dbh.Collected biomass data included the portion of the below-ground biomass (stump woodincluding central root system) that was extracted with the above ground (whole tree) biomass.The extracted below ground biomass averaged 18 percent (green basis) of the complete harvested tree weight.Whole tree above ground biomass, green without foliage, ranged from 78 to 1,135 pounds for sweetgum, 174 to 71 1 pounds for hickory, 167 to 1,227 pounds for red oak, and 112 to 615 pounds for white oak.Sweetgum had the highest moisture content a t 110 percent for total tree wood component and hickory bad the lowest a t 54 percent.The proportion of stem wood to branch wood ranged from 59 to 89 percent with the larger trees having more stem wood.Specific gravity, density, and moisture content of wood and bark for the four tree species are presented.The proportion of trees in wood and bark and in stem wood and branch wood, both in green and oven-dley conditions, are presented.Regression equations as a function of tree diameter and total height are also presented for complete trees and their components, Tables have been developed for complete tree, whole tree, and main stern.biomass.