Ağaçlardaki Büyüme Gerilmelerinin Odun Hammaddesi Üzerindeki Olumsuz Etkilerini Azaltma Metotları

Büyüme gerilmeleri meydana getirdikleri deformasyonlar sonucu odun hammaddesinin kullanım değerini düşürmekte ve önemli ekonomik kayıplara neden olmaktadır. Günümüzde araştırmacılar gerilmelerin etkilerinin önceden belirlenmesi ve azaltılmasına yönelik araştırmalar üzerinde çalışmaktadırlar. Bu makalede büyüme gerilmelerinin olumsuz etkilerinin en aza indirilebilmesi için yapılan çalışmalar ve kullanılan yöntemler incelenmektedir.

Anahtar Kelimeler:

Doğrudan müdahale, genetik müdahale, silvikültürel işlemler, hasat, depolama.

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Archer, R. R., 1986. Growth Stresses and Strains in The Trees. Springer-Verlag, Berlin.
Bozkurt, A. Y. ve N. Erdin, 2000. Odun Anatomisi. tü. Orman Fakültesi Yayın No: 4263/466. Dilek Matbaası.İstanbul.
Claassen, 1.,1993. Hans Merensky Foundation, pers. comm.via F.S. Malan.
Engür, M. O., 2006. Ağaç Kesim Teknikleri ve İş Güvenliği. Orkoop., Türkiye.
Ormancılık Kooperatifleri Merkez Birliği Eğitim Yayınları Dizisi: ı. European Union, 2002. Stresses in beech. Fair Project CT -98 3606.
FAO, 1980. Chainsaws in Tropical Forest. FAO Training Series, No: 2. Rome, Italy.
Fegely de, R., 2004. Sawing regrowth and plantation hardwoods with particular reference to growth stresses. Project No. PN02.l308.
Garcia, J. N. and i. L. de Lima, 2000. Log end splitting and improvement in sawing. Proceedings of IUFRO Conference. The future of eucalypts for wood products. Launceston, Australia.
Giordano, G. and P. Curro, 1973. Unusual methods for reducing damage from growth stresses in Eucalyptus sawn timber. Proceedings of IUOFRO V. Cape Town and Pretoria, South Africa. .
Gueneau, P. and J. Saurat, 1976. Growth stresses in beech. Wood Science and Technology. 10(2): 111-123.
Hillis, W. E., 1984. Wood Quality and Utilisation. In W. E. Hillis and A. G. Brown (eds) Eucalyptus for Wood Production. CSIRO and Acadernic Press Sydney.
Huang, Y. S., S. Chen, L. Kuo-Huang and M. C. Lee, 2005. Growth stress of Zelkova serrata and its reduction by heat treatment. Forest Products Journal. 55(5): 88- 93.
Kubler, H., 1988. Silvicultural control of mechanical stresses in trees. Canadian Journal of Forest Research. 18(10): 1215-1225.
Maeglin, R., J. Liu and R. S. Boone, 1985. High-temperature drying and equalizing effects on stress relief in yellow-poplar lumber. Wood and Fiber Science. 17(2): 240-253.
Malan, F. S., 1984. Studies on the phenotypic variation in growth stress intensity and its association with tree and wood properties of Souta African grown Eucalyptus grandis. PhD thesis, University of Stellenbosch, S. Africa.
Malan, F. S., 1993. The wood properties of three South African grown eucalypt hybrids. South African Forestry Journal. 167: 35-44.
Malan, F. S., 1995. Eucalyptus improvement for lumber production. International seminar on utilising eucalypts wood for sawmilling. Instituto de Pesquisas e Estudos Plorestais et al.. Sao Paolo-BraziJ.
Malan, F. S. and M. Hoon, 1992. Predicting growth stresses in mature Eucalyptus grandis from wood property/growth stress relationships in young trees. CSIR Report FOR-l 239.
Mattheek, C. and F. Walther, 1992. A new feliing technique to avoid end-splitting of deciduous trees. Proceedings of IUFRO V. Naney, France.
Mayer-Wegelin, H. 1955. Tensions and tension splitting in standing and felled logs. Mitt der Österreichischen Gesellschaft für Holzforschung, 7(2): 11-17.
Mayer-Wegelin, H. and K Mammen 1954. Tensions and tension splitting in standing beech wood. Allg. Forst. und Jagdzeitung, 125(9): 287-297.
Nicholson, J. E., 1973. Effect of storage on growth stress in mountain ash logs and trees, Australian Forestry Journal. 36(2): 114-124.
Nicholson, J. K, G. S. Campbell and D. F..Bland, 1972. Association between wood characteristics and growth stress leve!. Wood Science. 5: 109-117.
Nicholson, J. E., W. E. Hillis and N. Ditehburne, 1975. Some tree growth-wood property relationship of eucalypts. Canadian Journal of Forest Research. 5(3): 424-432.
Okuyama, T., Y. Kanawaga and Y. Hottori, 1987. Reduction of residual stresses in logs by direct heating method. Mokuzai Gakkaishi. 33(11): 837-843.
Okuyama, T., H. Yamamoto and Y. Murase, 1988. Quality improvement in smaillog of sugi by direct heating method. Mokuzai Kogyo. 43: 359-363.
Okuyama, T., H. Yamamoto and ı. Kobayashi, 1990. Quality improvement in smail log of sugi by direct heating method (2). Mokuzai Kogyo, 45(2): 12-16.
Polge, H. 1981. Influence of thinning on growth stresses of beech. Annals of Forest Science. 38: 407-423.
Sehaeht, L., J. N. Garcia and RVenkovsky, 1998. Genetic variation of growth stress parameters in clones of Eucalyptus urophylla. Scientia Forestalis. 54: 40-52.,
Tejeda, A., T. Okuyama, H. Yamamoto and M. Yoshida, 1997. Reduction of growth stress in logs by direct heat treatment: Assesment of a commercial-scale operation. Forest Products Journal. 47(9): 86-93.
Waugh, G., 1977. Reducing growth stresses in standing trees. Australian Journal of Forest Research. 7: 215-218.