Potencial da infusão das folhas de aroeira em sementes de Leucaena leucocephala (Lam.) de Wit

Abstract

Belonging to the Fabaceae family, Leucaena (Leucaena leucocephala (Lam.) de Wit) is a leguminous species native to Central America, widely used in agricultural areas, in the reforestation of degraded areas and production for animal feed for ruminants and monogastrics. However, it is constantly being pointed out as an invasive plant problem, due to its characteristics attributed to invasive organic weeds. The objective was to analyze the influence of concentrations of the infusion of the leaves of aroeira (Schinus terebinthifolius Raddi) on the physiological potential of Leucena seeds. The experiment was carried out in the Plant Science Laboratory of the Campus of Engineering and Agricultural Sciences of the Federal University of Alagoas in Rio Largo-AL. The experimental design used was completely randomized (DIC), with four replicates of 25 seeds per treatment. Analysis of variance (ANAVA) and polynomial regression were performed with the aid of SISVAR 5.6 software. The seeds of L. leucocephala were subjected to different concentrations of the infusion of aroeira leaves, being 0 (control), 20, 40, 60, 80 and 100g of aroeira leaves/liter of distilled water. The variables analyzed were germination; first germination count; germination speed index; average germination time; average germination speed; germination uncertainty; germination synchrony; seedling length; dry mass of the root and aerial part of the seedlings. The results obtained in this study demonstrated that at high concentrations of the infusion of aroeira leaves, all the variables analyzed were negatively influenced. The infusion of aroeira leaves has an allelopathic effect on the physiological potential of L. leucocephala seeds at high concentrations.