Allelopathic Effects Of the Invasive Plant Solidago canadensis

The seed germination and growth of five crops including Capsicum annuum, Lycoperiscum esculetum, Raphanus sativus, Brassica chinensis var. communis and Triticum aestivum were determined by water extract of Solidago Canadensis. The main results were as follows:1) High concentration of water extract of Solidago canadensis could restrain the seed's germination and developing, while low concentration of the water extract could accelerate developing seed of Raphanus sativus, Brassica chinensis var. communis and Lycoperiscum esculetum; 2) the restraining influences of the maceration extract from the organs above ground were stronger than those from the underground.