EFFECT OF SAMPLING HEIGHT AND SPACING ON WOOD EXTRACTIVES IN EUCALYPTUS TERETICORNIS SMITH
The investigation was carried out to evaluate the effect of sampling height and spacing on wood extractives in high density plantation of 25 year old Eucalyptus tereticornis. Four trees each from three spacings viz. 0.60 × 0.60 m (S1), 0.90 × 0.90 m (S2) and 1.20 × 1.20 m (S3) were randomly selected and harvested. The wood extractives were studied by taking sample discs at four different tree heights viz. ground level (H1), 30% (H2), 60% (H3) and 90 % (H4) of total tree height. The significantly highest extractives (cold water, hot water and alcohol-benzene soluble extractives) were recorded at ground level and lowest at 90 per cent of total tree height. Effect of spacing and its combined effect with sampling height on the extractives was found to be non-significant except alcohol-benzene soluble extractives.
Al-Mefarrej, H.A., Abdel-Aal, M.A., Nasser, R.A. & Shetta, N.D. (2011). Impact of initial tree spacing and stem height levels on chemical
composition of Leucaena leucocephala trees grown in Riyadh Region. World Applied Sciences Journal, 12 (7), 912-918.
Anonymous. (1988). The eucalypt Dilemma. Food and Agriculture Organization, Rome.
Arantes, M.D.C., Trugilho, P.F., Lima, J.T., Carneiro, A. de. C.O., Alves, E. & Guerreiro, M.C. (2011). Longitudinal and radial variation of extractives and total lignin contents in a clone of Eucalyptus grandis W.Hill ex Maiden × Eucalyptus urophylla S. T. Blake. Cerne, Lavras, 17(3), 283-291.
Badran, O.A. & El-Osta, M.L.M. (1977). Influence of specific gravity and extractive content on maximum crushing strength of wood. Alexandria Journal of Agricultural Research, 25(3), 541-548.
Bartlett, B.K. (1947). The use of transpiration. Biometrics, 3, 39-52.
Burdon, R.D., Kibblewhite, R.P., Walker, J.C.F., Megraw, R.A., Evans, R. & Cown, D.J. (2004). Juvenile versus mature wood: a new concept, orthogonal to corewood versus outerwood, with special reference to Pinus radiata and P. taeda. Forestry Science, 50, 399-415.
Chandel, S.R.S. (1965). A handbook of agricultural statistics (3rd ed.). Kanpur: Achal Singh Chandel, B79-B113.
Choong, E.T. (1969). The effect of extractives on shrinkage and other hygroscopic properties of ten southern pine woods. Wood and Fiber. 1(2), 124-132.
El-Osta, M.L.M., Badran, O.A. & Ajoung, E.M.A. (1980). Crushing strength of three Sudanese tropical hardwoods in relation to specific gravity, extractive and lignin content. Wood Science, 13(4), 225-232.
Hancock, W.V. & Swan, E.P. (1965). Petroleum ether soluble extractives of British Columbia coastal and interior type Douglas fir. Phytochemistry, 4(6), 791-798.
Hillis, W.E. (1972). Properties of eucalypt woods of importance to the pulp and paper industry. Appita, 26(2), 113-122.
Kollmann, F.E. & Cote, W.A. (1968). Principle of wood science and technology. Vol. 1. Solid Wood, New York: Springer.
Panse, V.G. & Sukhatme, P.V. (1967). Statistical methods for agricultural workers (2nd ed.). New Delhi: ICAR, 99-116.
Panshin, A.J. & DeZeeuw, P.V. (1970). Textbook of wood technology (3rd ed.). New Delhi: McGraw Hill, 705p.
Sharma, K.R. & Sharma, D.K. (2003). Variation in wood characteristics of Eucalyptus tereticornis Smith under high-density short rotation system. Journal of Tree Science, 22(1&2), 47-53.
Stinger, J.W. & Olson, R.T. (1987). Radial and vertical variation in stem properties of juvenile black locust. Wood and Fibre Science, 19(1), 59-69.
TAPPI T204 cm-07. (2007). Solvent extractives of wood and pulp. TAPPI, Atlanta, USA.
TAPPI T207 cm-08. (2008). Water solubility of wood and pulp. TAPPI, Atlanta, USA.
Tewari, D.N. 1991. A Monograph on Eucalyptus. Surya Publications: Dehra Dun, 57-58.
Unkalkar, V.G., Kulkarni, A.G., Tripathy, R.S. & Jauhari, M.B. (1975). In-tree variation of wood and kraft pulp quality of Eucalyptus hybrid. IPPTA, 12(1), 38-46.
Via, B.K., So, L.C., Groom, L.H., Shupe, T.F., Stine, M & Wikaira. J. (2007). Within tree variation of lignin, extractives, and microfibril angle coupled with the theoretical and near infrared modeling of microfibril angle. IAWA Journal, 28(2), 189–209.
Wangaard, F.E. & Grandos, L.A. (1967). The effect of extractives on water vapour sorption by wood. Wood Science and Technology, 1(4), 253-277.
This work is licensed under a Creative Commons Attribution 3.0 License.