摘要：The objective was to evaluate the allelopathic potential of clover in different extracts concentrations and obtained in different ways from hairy beggarticks’s seeds germination and plantlets initial development. It was evaluated in 3 × 3 × 5 factorial scheme, where, extracts obtained by infusion, maceration, and alcoholic from white clover, red clover, and arrowleaf clover, in four concentrations (2.5%; 5.0%; 7.5% and 10%) and witness (distilled water), respectively. There were sown 100 seeds in germitest paper roll, in four repetitions, which were moisten with different extracts and/or distilled water, in accordance with treatment. The germination test was installed in growth chamber (BOD) with photo light/dark period of 12/12 h and temperature of 25°C ± 1°C. Germination evaluation was carried out daily and at the end of the experiment (10 days); the germination speed index (GSI), root length (RL) and aerial part (APL) were measured. It was carried out also infrared spectrum of extracts. It was observed that all extracts present effect on hairy beggarticks’s seeds, causing reduction in germination, GSI, RL, and PCA. It was observed the presence of phenolic compounds in all extracts.
