Extrato de nabo forrageiro sobre a germinação e crescimento inicial de diferentes plantas

Abstract

This study evaluates the allelopathic potential of the aerial part of radish plants on the germination and early development of picão-preto (Bidens pilosa), lettuce (Lactuca sativa L.) e corda-de-viola (Ipomoea sp). The experimental design was completely randomized, consisting of three different species of plants and 5 EBA concentration values of turnip - forage (0 %, 25 %, 50 %, 75% and 100%), making up a total of 4 replicates. It was evaluated the final percentage of germination, germination speed index (GSI) and the length of shoots and roots of seedlings. The extract of the aerial part of radish showed allelopathic potential on the studied plant species. At 100% of extract concentration was obtained a complete inhibition of germination and GSI for picão-preto and lettuce, and in regard to these variables were obtained a reduction of respectively 51% of the germination and 60% IVG in corda-de-viola. The allelopathic activity of extracts of radish aerial parts on the studied plants development has significantly increased when was increased your concentration.