بررسي توان دگرآسيبي چاودار و گندم بر جوانه زني و رشد اوليه علف هاي هرز سلمه تره (Chenopodium album) و تاج ريزي (Solanum nigrum)

Study of Allelopathic Effects of Rye and Wheat on Germination and Early Growth of Lambsquarter ( Solanum nigrum) and Black Nightshade (iChenopodium album)

In order to evaluate the allelopathic effects of two crops extracts (rye and wheat) on germination and early growth of lambsquarter and black nightshade, an experiment was conducted with a factorial arrangement based on completely randomized design with three replications in Seed Library Research of Tehran university. Treatments were: extract concentrations^ (control),5,10,25 and 40), weed species (lambsquarter and black nightshade) and crop plants (wheat and rye). Interactions of weed species x crop plants had no significant effect on radicle and plumle length. Also Interactions of weed species * crop plantsx extract concentrations had no significant effect on the radicle length of weed species. The effects of other treatments and their interactions on germination percentage, germination rate, radicle length and plumle length were significant. The germination percentage of black nightshade was susceptible to allelopathic matter when compared with lambsquarter. The extract of the above two crops had more inhibitory effects on germination rate than the germination percentage. Low concentrations of extracts caused a higher reduction in germination rate. Early growth of lambsquarter was more tolerant than black nightshade to allelopathic mater. Root length was more sensitive than shoot length to extracts.