Estrutura populacional do Paricá (Schizolobium amazonicum Huber ex Ducke.) no Horto agroflorestal da Universidade Federal Rural da Amazônia, Belém, Pará.

Abstract

The Paricá is a species which belongs to the Fabaceae family, occurs mainly in the Amazon region. It has heliophilic characteristics, developing in rustic environments. The species is also known as: guarapuruvu, cuiabano pine and several other names, and can reach 40 meter in height and 100 cm in diameter chest height in its adult phase. The population structure is an important tool to understand the interactions between species, considering the places they are inserted. The objective was to study the population structure of Paricá in the Agroforestry Garden of the Federal Rural University of Amazon. A total of 69 individuals from S. amazonicum were inventoried by a census. The analyses were performed using Rstudio software to verify the correlation between quantitative and qualitative variables. For diameter distribution, a negative exponential curve was verified with the mean value of 32,54 cm, in the height distribution the growth pattern was still considered normal for individuals with a mean of 17,48 meters. Regarding the qualitative variables, the correlation between Stem Quality, Crown Quality, Crown Lighting and Vine were considered statistically significant, revealing that the effects of the variables differ from each other. The correlations between chest diameter height (DAP) and height were verified with a value of 0,82 being considered a strong correlation between these variables. In addition, the variables Crown Quality and Crown Illumination presented a value of 0,77 in the correlation. It is concluded that the studied population indicated a normal pattern in its development and in the qualitative variables, the population presented good classifications established for the individuals.