Manejo do crescimento diamétrico de Araucaria angustifolia (Bert.) O. Ktze. baseado na árvore individual
In this study the potential of diameter growth of Araucaria angustifolia (Bert.) O. Ktze. at different sites in Southern Brazil was analyzed. The objectives were to obtain information for the management of this species in uneven-aged mixed stands for high value timber production focused on future...
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| Format: | Article |
| Language: | Portuguese |
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Universidade Federal de Santa Maria
2001-01-01
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| Series: | Ciência Florestal |
| Online Access: | http://www.redalyc.org/articulo.oa?id=53411202 |
| Summary: | In this study the potential of diameter growth of Araucaria angustifolia (Bert.) O. Ktze. at
different sites in Southern Brazil was analyzed. The objectives were to obtain information for the
management of this species in uneven-aged mixed stands for high value timber production focused
on future crop trees. The material consisted of 400 trees of native forests and plantations growing
under varying site conditions and treatments in the states of Santa Catarina, Parana and Rio Grande
do Sul. The research method applied was an ex-post facto (observational) one that is based on an
explorative data analysis of data taken from 16 temporary sample plots, each consisting of 25
araucarias. For each plot it was made a stem and crown distribution map. The study shows that
crown width is a very good estimator for diameter growth and it is closely related to the easy
measurable variable diameter at 1.30 m. This relationship was used to develop decision tools based
on the management of the growing space of the individual tree. The maximum crown expansion at a given age and therefore also the maximum radial increment are strongly related to site quality. That
means that site quality has to be considered as a limiting factor for the production goals in araucaria
stands. Decision tools have to be adapted to these circumstances. |
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| ISSN: | 0103-9954 1980-5098 |