Allelopathic effect of aqueous extracts of the common associated species on the germination of rainfed barely grains

Abstract EN

The present study was conducted in the laboratory to study the allelopathic potentials of most common associated native species (Glebionis coronaria, Achillea santolina, Erucaria microcarpa, Carrichtera annua, Vicia lutea) with rainfed barely on its germination.

Various concentrations of shoot (leaf and stem) aqueous extracts from the associated species (0%, 10%, 30%, 50%, 80% and 100%) were valued.

The results showed that the aqueous extract of 50% concentration had the highest be inhibitory effect on the germination of barely grains compared to control.

Under this concentration, the percentage of germination was ranging from 2.2 for C.

annua extract to 13.3 for G.

coronaria extract.

For A.

santolina, the lowest germination percentage of barely grains (2.2%) was obtained with concentration 80%.

On the other hand, under aqueous extract of V.

lutea with 30% concentration, the lowest value for germination percentage for barely grains was obtained (20%).

The highest values for plumule and radicle length of barely were obtained under control conditions and 10% concentration of G.

coronaria and E.

microcarpa extracts.

The lowest values for plumule and radical were obtained at aqueous concentrations of 30%, 50% and 80% depending on species.

The germination velocities for all the studied species were highest at control and 10% concentrations but decreased under 50%, 80% and 100% concentrations of the studied species.

These results help in improving our understanding to the inhibitory effects of the common associated wild species with rainfed barely on its germination and growth.