African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6688

Full Length Research Paper

Shape and size relationships of Araucaria angustifolia in South Brazil

Myrcia Minatti
  • Myrcia Minatti
  • Forest Science Department, Federal University of Paraná, 900 Lothário Meissner Avenue, Curitiba, Paraná, Brazil.
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André Felipe Hess
  • André Felipe Hess
  • College of Agriculture and Veterinary (CAV), Santa Catarina State University (UDESC), Av. Luiz de Camoes, 2090, Lages, Brazil.
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Pollyni Ricken
  • Pollyni Ricken
  • Forest Science Department, Federal University of Paraná, 900 Lothário Meissner Avenue, Curitiba, Paraná, Brazil.
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Tascilla Magalhães Loiola
  • Tascilla Magalhães Loiola
  • College of Agriculture and Veterinary (CAV), Santa Catarina State University (UDESC), Av. Luiz de Camoes, 2090, Lages, Brazil.
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Isadora Arruda de Souza
  • Isadora Arruda de Souza
  • College of Agriculture and Veterinary (CAV), Santa Catarina State University (UDESC), Av. Luiz de Camoes, 2090, Lages, Brazil.
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  •  Received: 12 May 2016
  •  Accepted: 26 September 2016
  •  Published: 13 October 2016

Abstract

Studies on morphology and occupancy area of trees provide knowledge on features and functions of forest ecosystem, especially in terms of competition and growth of trees. The main purpose of this work was to develop models for shape and size relationships of Araucaria angustifolia in natural forest remains of species. Dendrometric and morphometric variables from 210 trees from three sites were used. Results showed that the species present different shape and size, vigor and productive capacity in evaluated sites. Fitted models indicated that there was transition in competition mode (symmetric or asymmetric) for resources, which is result of available growing space for trees. Relationship between shape and size is derived from slope of regression line and regarded as an indication of need for silvicultural interventions to reduce competition, which is a key information for obtaining better practices in forest management.

Key words: Araucaria forest, forest measurements, growth.