Effects of Rotation, Site, and Clone on the Chemical Composition of <i>Populus</i> Hybrids
Keywords:<i>Populus</i> hybrids, site, clones
Chemical content values were determined for three Populus clones grown on two dissimilar sites by component (wood, bark, and wood/bark specimens), tissue age (1-, 2- and 4-years-old), and rotation. The chemical content values obtained included extractives, holocellulose, alpha-cellulose, and lignin. In general, analysis of the data for the wood, bark, and wood/bark specimens indicated that: 1) wood was high in holocellulose and alpha-cellulose content compared to bark, 2) bark was high in lignin and extractive content values compared to wood, and 3) wood/bark chemical content values were between the values for the wood and bark specimens.
The chemical content data were analyzed to identify: 1) significant differences between rotations by component (wood, bark, and wood/bark) for a given age, clone, and site, and 2) significant differences between sites for four-year-old wood, bark and wood/bark specimens of a given rotation, and clone. Statistical analyses indicated that significant differences existed among clones, sites, ages, and rotations. Within the wood, bark and wood/bark specimens, tissue age, rotation, and site influenced the chemical content values more than the parentage. Potential chemical yields derived from the three Populus hybrid clones investigated will depend on component, age, rotation, and site with limited parentage effects.
American Society for Testing and Materials. 1980. Standard method for preparation of extractive-free wood, Part 22, ASTM D 1105-79. Standard test method for lignin in wood, Part 22, ASTM D 1106-77. Standard test method for alpha-cellulose in wood, Part 22, ASTM D 1103-77. Philadelphia, PA.nAnderson, H. W., and L. Zsuffa. 1975. Yield and wood quality of hybrid cottonwood grown in two-year rotation. Ontario Min. of Nat. Resour., Forestry Research Report No. 101, 35 pp.nBendtsen, B. A. 1978. Properties of wood from improved and intensively managed trees. For. Prod. J.28(10):61-72.nBendtsen, B. A., R. R. Maeglin, and F. Deneke. 1981. Comparison of mechanical and anatomical properties of eastern cottonwood and Populus hybrid NE-237. Wood Sci.14(1):1-14.nBowersox, T. W., P. R. Blankenhorn, and W. K. Murphey. 1979. Heat of combustion, ash content, nutrient content, and chemical content of Populus hybrids. Wood Sci.11(4):257-262.nBrowning, B. L. 1967. Methods of wood chemistry. John Wiley & Sons, Interscience Publ., Inc., New York, N.Y. 882 pp.nCech, M. Y., R. W. Kennedy, and J. H. G. Smith. 1960. Variation in some wood quality attributes of one-year-old black cottonwood. Tappi43(10):857-858.nCheng, W. W., and D. W. Bensend. 1979. Anatomical properties of selected Populus clones grown under intensive culture. Wood Sci.11(3):182-187.nDawson, D. H., J. G. Isebrands, and J. C. Gordon. 1976. Growth, dry weight yields, and specific gravity of 3-year-old Populus grown under intensive culture. USDA Forest Serv. Res. Paper NC- 122. 7 pp.nGeyer, W. A. 1981. Growth, yield, and woody biomass characteristics of seven short-rotation hardwoods. Wood Sci.13(4):209-215.nHolt, D. H., and W. K. Murphey. 1978. Properties of hybrid poplar juvenile wood affected by silvicultural treatments. Wood Sci.10(4):198-203.nHunt, K., and J. K. Keays. 1973. Short-rotation trembling aspen trees (Populus tremuloides Mich. X) for kraft pulp. Can. J. For. Res.3:180-184.nLaundrie, J. F., and J. G. Berbee. 1972. High yields of kraft pulp from rapid-growth hybrid poplar trees. USDA Forest Serv. Research Rep. No. FPL-186, 24 pp.nMarton, R., G. R. Stairs, and E. J. Schreiner. 1968. Influence of growth rate and clonal effects on wood anatomy and pulping properties of hybrid poplars. Tappi52(5):230-235.nMurphey, W. K., T. W. Bowersox, and P. R. Blankenhorn. 1979. Selected wood properties of young Populus hybrids. Wood Sci.11(4):263-267.n
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