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Allelopathic Effects of Aquatic Extracts from Solidago canadensis‘‘‘‘s Roots and Rhizospheric Soil on the Seed Germination and Early Seedling Growth of Chinese Cabbage and Radish

加拿大一枝黄花根系和根际土壤水浸液对萝卜和白菜种子萌发及幼苗生长的影响