) Brassicanpusl.( كلزا PF در غلظت هاي مختلف بربرخي ويژگي هاي جوانه زني بذر رقم )Sinapis arvensis( اثرات آللوپاتيك عصاره آلي اندام هاي مختلف خردل وحشي

Allelopathic effects of different parts of wild mustard (Sinapis arvensis L.)extracts at different concentrations on germination and seedling growth of canola (Brassica napus L.) cv. PF

Weed interference is one of the most restrictive factors in agricultural yield .This interference is often due to the allelopathic effects of the weeds. In this research, the effect of aqueous extract concentrations of root, shoot, seed, flower, stem and leaf were evaluated on germination percentage and seedling growth of the canola. A complete randomized design was employed in a factorial arrangement including wild mustard organs and totally with treatments of aqueous extracts (0%, 0.5%, 1.5%, 3.5%, 5% and 7%) each in 4 replications. First stock solution 10% (w/v) was prepared, and then the other solutions obtained by diluting the stocks. All the different aqueous extracts decreased percentage of germination and length of radicle and coleoptile. The maximum germination was found in root extracts and minimum in leaf and flower extracts. The effect of flower extracts on length of radicle and coleoptile were more than of other organs, whereas the least effect belonged to root extract. Generally by increasing the concentration of extracts, the germination and growth were decreased.