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| Format: | Artículo científico |
| Language: | es |
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Universidad San Francisco de Quito
2012
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| Online Access: | https://www.redalyc.org/articulo.oa?id=726180833009 |
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Table of Contents:
- Modelos descriptivos de corona para Laurel (Cordia alliodora) bajo sistemas agroforestales en el Bosque Protector Sumaco, Ecuador Álvaro Cañadas Mykola Korol Carlos Zambrano Bolívar Camacho Multidisciplinaria (Ciencias Naturales y Exactas) Crown base crown model crown ratio crown length crow projection The ability to describe the shape and size of a tree crown is an important pre-requisite for the estimation of the stability of standing forest trees. The paper describes a crown model for laurel in agro forestry systems of the Protected Forest Sumaco. The empirical data base includes altogether 207 Laurel sample trees. A stem analysis was carried out for each sample tree crown ratio, crown length, crown surface area and crow projection. The sample trees were grown in 3 agro forestry stands which had been subjected to different thinning regimes. To determine the crown width a lineal relationship existed between DBH and crown width. The modification of the models in direction toward a non-lineal relationship not showed improvements in the estimate of this parameter. The crown base, the model proposed by Durský (2000) was demonstrated the best r ˇ 2 (0.84). The distortion value of this model was closed to the ideal value of 0 (0.0083) and mean squared error was 1.49 m. This model was adjusted to the characteristics of Laurel. It was developed a model in order to determinate the crown length. The model presented an r2 of 0.71. This means that, 71 % of total variance observed in Laurel can be explained for this parameter. The developed models of this research could be used to establish and calculate other forest attributes of Laurel. 2012 artículo científico 1390-5384 https://www.redalyc.org/articulo.oa?id=726180833009 es http://www.redalyc.org/revista.oa?id=7261 Avances en Ciencias e Ingenierías application/pdf Universidad San Francisco de Quito Avances en Ciencias e Ingenierías (Ecuador) Num.2 Vol.4