Allelopathic effect of black oat extract (Avena strigosa Schreb.) on the germination and growth of soybean (Glycine max L. Merril)

Abstract

This paper aims to evaluate the influence of black oat extract in the soybean germination and development. The extract was obtained from leaves and roots of plants at 30 and 60 days old, which have been triturated fresh and dried, making it eight treatments, and one control group. Have been used twenty soybean seeds, laid on a filter paper with the oat extract in different treatments and used distillated water on the control group. The use of black oat extract had no significant influence on the percentage of germination of soybean seeds. Therefore, a difference was noticed concerning the seed rate of germination, showing that the treatments with extracts delayed the process of germination. The extracts with dry leaves and roots at 30 days old provided a smaller seedling soybean development, while the extracts of black oat at 60 days old offered better growing of the roots and leaves compared to the control group. The black oat plants in its initial stage (30 days) affected negatively seedling soybean development.