Interação alelopática de milheto com soja e picão-preto

Abstract

A soybean is one of the most cultivated oilseeds in the world, being considered one of the main basis of nourishment of several people, having an expansion in the 60th decade in Brazil. This research had as objective to evaluate the allopathic influence of the pennisetum typhoides most known as millet covering the invasor plant bindens pilosa, with the the intention of carrying out its control, as well as verify its interaction with the soybean, there for dry mass was obtained from millet leaves and used for the preparation of the aqueous extract. Bidens pilosa and Glycine max seeds were incubated in gerbils containing 8 mL of millet aqueous extract at concentrations 0, 25, 50, 75 and 100%, at each concentration 5 gerbils with 25 seeds each for 7 days at 25 ° C. After this period, the percentage of germinated seeds was counted and the fresh seedlings were measured. The millet presented allelopathic properties on the bidens pilosa. Allelochemical compounds present in the aqueous fraction have allelopathic effects on germination, length and fresh mass, increasing these variables in low doses and reducing them, in concentrations higher than 75%. In addition, millet presented a positive allelopathic effect with the soybean crop, favoring its cultivation.