Extrato aquoso de capim-pé-de-galinha (Eleusine indica) e seus efeitos alelopáticos em feijão (Phaseolus vulgaris) e sorgo (Sorghum bicolor)

Abstract

The rationale for this research lies in the agronomic and nutritional importance of common beans in Brazil, especially in the state of Paraná, which is the country's largest producer of this crop, and in the importance of sorghum as a major component of feed production for livestock. In addition, both crops play a significant role in second-season cultivation in the southwestern region of Paraná. This study aimed to evaluate the allelopathic effects of goosegrass (Eleusine indica) aqueous extract on the germination and early seedling development of common bean (Phaseolus vulgaris) and sorghum (Sorghum bicolor). The experiment was conducted in the Phytosanitary Laboratory of the Federal University of Technology – Paraná (UTFPR), Dois Vizinhos Campus, using the paper roll method (PR) with five treatments: four extract concentrations (10%, 5%, 2.5%, and 1%) and a control treatment with distilled water. A completely randomized design (CRD) was used, with four replications per treatment to ensure greater reliability of the results. For the bean paper rolls, 20 seeds were used, whereas 25 seeds were used for sorghum. Variables evaluated included germination percentage, normal and abnormal seedlings, root and shoot length, fresh and dry biomass, and percentage of dead seeds. Data were subjected to regression analysis and Tukey’s test at the 5% probability level using the Rbio software. The results obtained demonstrated satisfactory responses regarding the allelopathic effects of the extract at different concentrations in both evaluated crops.