Tree Growth Stresses

JD Boyd

doi:10.1071/bi9500294

Tree growth stresses—Part IV: Visco-elastic strain recovery

Wood Science and Technology ◽

10.1007/bf00350824 ◽

1972 ◽

Vol 6 (2) ◽

pp. 95-120 ◽

Cited By ~ 7

Author(s):

J. D. Boyd ◽

K. B. Schuster

Keyword(s):

Tree Growth ◽

Elastic Strain ◽

Strain Recovery ◽

Growth Stresses

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On the distribution of tree growth stresses ? Part I: An anisotropic plane strain theory

Wood Science and Technology ◽

10.1007/bf00352022 ◽

1974 ◽

Vol 8 (3) ◽

pp. 184-196 ◽

Cited By ~ 20

Author(s):

R. R. Archer ◽

F. E. Byrnes

Keyword(s):

Plane Strain ◽

Tree Growth ◽

Strain Theory ◽

Growth Stresses

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METHODS FOR ALLEVIATION AND REDUCTION OF THE EFFECTS OF GROWTH STRESSES IN Eucalyptus urophylla

Revista Árvore ◽

10.1590/1806-90882017000200003 ◽

2017 ◽

Vol 41 (4) ◽

Author(s):

Juliana Cristina da Silva ◽

Ana Márcia Macedo Ladeira Carvalho ◽

Bruno de Freitas Homem de Faria

Keyword(s):

Tree Growth ◽

Growth Stress ◽

Efficient Technique ◽

Eucalyptus Urophylla ◽

Herbicide Application ◽

Growth Stresses ◽

Cracking Control

ABSTRACT There are many species of the Eucalyptus genus presents high levels of the growth stress. These stresses are mechanical efforts generated during the tree growth to help maintaining the balance of the cup in response to environmental and silvicultural agents. The stresses are responsible for the cracks of tops and for the warp after unfolding. The objective of this study was to test five different methods to minimize the effects of growth stress on the production of Eucalyptus urophylla sawlogs. The boards produced were then evaluated and measured for cracking, arching, curvature and cupping. The treatment with herbicide presented the smallest medium indexes of cracking (16.63 cm) and of arching (0.23 mm.m-1), while the medium curvature was smaller than observed in boards unfolded in 72 hours after the reduction of the trees (0.88 mm.m-1). Unfolding after ten days of harvesting represented the less efficient technique in the cracking control, curvature and arching. The cupping was not observed during boards processing. The herbicide application was more efficient in the reduction of the effects of the growth tensions.

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Tree Growth Stresses

Australian Journal of Biological Sciences ◽

10.1071/bi9500270 ◽

1950 ◽

Vol 3 (3) ◽

pp. 270 ◽

Cited By ~ 9

Author(s):

JD Boyd

Keyword(s):

Stress Distribution ◽

Tree Growth ◽

Experimental Methods ◽

Growth Stresses

Experimental methods for the determination of natural longitudinal stressesin trees are described and the data are used in the development of a mathematicalexpression for the stress distribution.

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On the distribution of tree growth stresses

Wood Science and Technology ◽

10.1007/bf00350177 ◽

1979 ◽

Vol 13 (1) ◽

pp. 67-78 ◽

Cited By ~ 6

Author(s):

R. R. Archer

Keyword(s):

Tree Growth ◽

Growth Stresses

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METHODS FOR ALLEVIATION AND REDUCTION OF THE EFFECTS OF GROWTH STRESSES IN Eucalyptus urophylla

Revista Árvore ◽

10.1590/1806-90882017000400003 ◽

2017 ◽

Vol 41 (4) ◽

Author(s):

Juliana Cristina da Silva ◽

Ana Márcia Macedo Ladeira Carvalho ◽

Bruno de Freitas Homem de Faria

Keyword(s):

Tree Growth ◽

Growth Stress ◽

Efficient Technique ◽

Eucalyptus Urophylla ◽

Herbicide Application ◽

Growth Stresses ◽

Cracking Control

ABSTRACT There are many species of the Eucalyptus genus presents high levels of the growth stress. These stresses are mechanical efforts generated during the tree growth to help maintaining the balance of the cup in response to environmental and silvicultural agents. The stresses are responsible for the cracks of tops and for the warp after unfolding. The objective of this study was to test five different methods to minimize the effects of growth stress on the production of Eucalyptus urophylla sawlogs. The boards produced were then evaluated and measured for cracking, arching, curvature and cupping. The treatment with herbicide presented the smallest medium indexes of cracking (16.63 cm) and of arching (0.23 mm.m-1), while the medium curvature was smaller than observed in boards unfolded in 72 hours after the reduction of the trees (0.88 mm.m-1). Unfolding after ten days of harvesting represented the less efficient technique in the cracking control, curvature and arching. The cupping was not observed during boards processing. The herbicide application was more efficient in the reduction of the effects of the growth tensions.

Download Full-text