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Forests 2017, 8(3), 79; doi:10.3390/f8030079

Evaluation of Bent Trees in Juvenile Teak (Tectona grandis L.f.) Plantations in Costa Rica: Effects on Tree Morphology and Wood Properties

1
Brinkman & Asociados Reforestadores de Centroamérica, Parrita Apartado 6009, Costa Rica
2
Instituto Tecnológico de Costa Rica, Escuela de Ingeniería Forestal, Apartado 159-7050, Cartago, Costa Rica
*
Author to whom correspondence should be addressed.
Academic Editors: Phillip G. Comeau and Timothy A. Martin
Received: 26 November 2016 / Revised: 10 March 2017 / Accepted: 11 March 2017 / Published: 14 March 2017
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Abstract

Bent trees have been observed during the early years in juvenile plantations (less than 5 years-old) of Tectona grandis in Costa Rica. The relationship between bending and the morphological characteristics of the trees was explored. An evaluation of bent trees was conducted in six juvenile plantations (8, 17, 27, 28, 31, and 54 months old) of Tectona grandis. Site 1 with 8-month-old plantations did not display any relationship with any tree morphological variable (diameter, height, and crown weight of tree), whereas for the sites 2, 3, and 4 with 17-, 27-, and 28-month-old plantations, respectively, all the tree morphological variables were statistically correlated with the bent trees. A multiple regression analysis showed that the most influential variables were height to crown base, crown weight, diameter, and total height of the tree. An evaluation of the bending risk factor (RF) was correlated with the height to crown base, crown weight, and form factor. The modulus of elasticity and chemical compositions of bent trees differed from those of straight trees. The causes of tree bending are complex, involving, among other factors, the morphology of the trees, plantation conditions, and other factors specific to the xylem, such as the specific gravity, modulus of elasticity, and presence of calcium and magnesium in the wood. View Full-Text
Keywords: bent trees; tropical species; tree stability; wood; tropical wood bent trees; tropical species; tree stability; wood; tropical wood
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Guzmán, N.; Moya, R.; Murillo, O. Evaluation of Bent Trees in Juvenile Teak (Tectona grandis L.f.) Plantations in Costa Rica: Effects on Tree Morphology and Wood Properties. Forests 2017, 8, 79.

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