MODELAGEM DA DISTRIBUIÇÃO DIAMÉTRICA DE ESPÉCIES LENHOSAS DA CAATINGA, SEMIÁRIDO PERNAMBUCANO

Ciencia Florestal

关键词: distribuição probabilística;    Manihot carthaginensis;    Mimosa ophthalmocentra;    Poincianella bracteosa.;   

DOI  :  10.5902/1980509824214

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Pesquisas Florestais

【 摘 要 】

The objective of this study was to adjust and select probability density functions that describe the diametric distribution ofPoincianella bracteosaTul,Mimosa ophthalmocentraMart. ex Benth eManihot carthaginensis subsp. glaziovii (Muell. Arg.) Allemspecies, and for this species as whole, which occured in Caatinga biome, in the municipality of Floresta, in the semiarid region of Pernambuco state. The study was conducted in an area with disturbance history with approximately 10 ha, where it was installed 20 plots (20x20m), in a symmetric way, where all the trees with circumference at the breast right (CBH) ≥ 6cm were identified and their diameters and heights were measured. It was tested the probabilistic functions such as: Weibull 3 parameters,  Jonson’s Sb, Normal, Log-nomal, Gamma, Beta and Meyer. A class interval of 2 cm was used and Kolmogorov-Smirnov test was used as the selection criterium. It was found that the Weibull 3 parameters was the best function described the diametric distribution forMimosa ophthalmocentraeManihot carthaginensis . ForPoincianella bracteosaJohnson’s Sb was the ideal one. The existence of strong disturbance observed in the study area, is explained by a unimodal distribution, reflected in the three species, so that the area deserves due attention so that this process ceases.

【 授权许可】

CC BY-NC