Levantamento fitossociológico na cultura da pitaya cultivadas no município de Rio Largo - AL

Abstract

This work aimed to carry out the phytosociological study of weeds in an area ultivated with Pitaya pasture in the municipality of Rio Largo - AL. The soil was prepared using an herbicide application and 120 days after planting, the phytosociological study was carried out, where five samples per block were sampled, totaling twenty samples in the four blocks, using a hollow square measuring 0.50 x 0, 50 m wide, where all weeds were collected and sorted by species. From these values, the following characteristics were determined: density, frequency, abundance, relative density, relative frequency, relative abundance, relative dry mass and relative importance value index. The area in which the study was carried out showed a great diversity of weeds, with 24 species contained in 13 botanical families; being the families Poaceae and Asteraceae with greater expressiveness. It was possible to perceive that the emergence of weeds affect the Pitaya culture since there is competition for water, space and soil nutrients.

Keywords: Pitaya; Phytosociological; Weeds.