Construction of site curves for native Mimosa scabrella stands in the metropolitan region of Curitiba

CERNE

Machado, Sebastião do Amaral¹  Cavalheiro, Ricardo¹  Jaskiu, Eldemar¹  Souza, Ronan Felipe de¹ 

[1] Universidade Federal do Paraná, Curitiba, Brazil$$

关键词: Bracatinga;    site classification;    model testing;    curve stability.;   

DOI  :  10.1590/S0104-77602011000400007

来源: Universidade Federal de Lavras-UFLA

【 摘 要 】

This study aims to construct definitive sites curves for native bracatinga stands (Mimosa scabrella Benth) in the metropolitan region of Curitiba. Data used was extracted from 648 pairs of values of dominant height and age. Ten mathematical models were tested for guide curve fitting. Selection of the best performing model was based on adjusted coefficient of determination(R_aj²), standard error of estimate in percentage (S_yx%) and graphic analysis of residuals. Models were tested and the Chapman-Richards model was selected for construction of limit curves of site classes due to the biological significance of its coefficients, statistical performance and good distribution of residuals. Curve anamorphism and model validity were verified using the test proposed by Kirby (1975). Curve stability was demonstrated based on stem analysis data composing part of the database. Site classification for bracatinga stands was thus considered suitable and can potentially be applied to development of growth and yield equations for this particular species.

【 授权许可】

Unknown