COMPARAÇÃO DA ESTRUTURA POPULACIONAL DE Annona coriacea Mart. (Annonaceae) EM DIFERENTES FITOFISIONOMIAS DO CERRADO

Abstract

Annona coriacea Mart. from Goiás to the state of São Paulo and Mato Grosso do Sul. The present study discusses the population structure of this species in different phytophysiognomies, cerrado stricto sensu and cerradão, in the city of Rio Verde - Goiás, Brazil, based on the sample of regenerating individuals and adults at Fontes do Saber Farm, where 13 systematized plots of 400 m² (20x20m) were installed in each phytophysiognomy. Subjects were identified with numbered aluminum plates and their circumference or diameter and height were measured. The chemical and particle size attributes of the soil were evaluated in both phytophysiognomies. A total of 130 individuals were sampled in the population studied, being 42 of them regenerating in stricto sensu and 49 in cerradão, 33 tree individuals in stricto sensu and 6 in cerradão. The total basal area of regenerating individuals in the cerrado stricto sensu was 0.0072 m² while the arboreal was 0.3809 m². The basal area of the regenerating individuals in the cerradão was 0.006 m² and the arboreal 0.058 m². The two phytophysiognomies were statistically distinct (p <0.01) when compared to density and basal area. As for soil analysis, a larger number of individuals were observed in nutritionally poorer soils, expressing a natural characteristic of Cerrado plants, which are naturally adapted to these conditions. It is concluded that A. coriacea is not regenerating in both phytophysiognomies, since in the cerradão can germinate, but can not develop. Therefore, it does not have a population structure pattern.