STUDY ON ALLELOPATHIC EFFECTS OF Solidago canadensis L.TO THE GROWTH OF FOUR PLANTS

Four plants including Raphanus sativus L.,Brassica oleracea var.botrytis.,Brassica caulorapa Pasq.and Phaseolus radiatus L.were used to determine the allelopathic effect of aqueous extract mixture from the stems and leaves of Solidago canadensis L.The results showed that high concentration of aqueous extract of Solidago Canadensis could inhibit the growth of crop plants while low concentration of aqueous extract of Solidago Canadensis stimulate the growth of seedling of Brassica oleracea var.botrytis.,Brassica caulorapa Pasq.and Phaseolus radiatus L.,and also accelerate the root growth of Phaseolus radiatus L.