Fitossociologia e disponibilidade espacial de forragem em uma área de caatinga degrada.

Abstract

This study aimed to evaluate the spatial distribution of plant species, as well as the availability and chemical composition of the forage in an succession vaatinga area in the Hinterland of Alagoas. The study was conducted in the towns of - Piranhas, Alagoas region of high backcountry. Two collections of material, one for litter and one for herbs and subshrubs was performed. It was undertook a floristc and also an floristic and phytosociological survey of the area. To determine the spatial distribution of the average mass of the weights of each point of data collection and analysis were performed. Samples of litter and herbaceous obtained from the samples were placed in paper bags for storage and later analysis. Analysis of dry matter (DM), mineral matter (MM), crude protein (CP), the ethereal layer (EE), neutral detergent fiber (NDF), acid detergent fiber (ADF) and lignin were performed. Altogether 4,766 plants were divided into eight genera, 8 families and 12 species. The variability of the species in the study area is extremely low, reflecting the high degree of degradation. The distribution of species in the area showed characteristics of aggregation, where the species with the highest number of individuals appeared in certain regions. The species with the largest representation were Pycreus polystachyos (Rottb) P.Beuav . and Commelina diffusa Burm . F. With values above 1000 individuals. The species Poincianella pyramidalis (Tul.) L. P. Queiroz (Catingueira) showed greater dominance among the trees, a fact linked to their high resistance. The spatial distribution of the chemical attributes of garbage showed similarities. For herbaceous species and sub - shrub stratum Melochia tomentosa L. influences DM and NDF was attributes, while for the CP influenced more species Crotalaria stipularia Desv.