Abstract:

【OBJECTIVE】To find a fast and effective way for the capture root exudates released from by Ageratina adenophora.【METHOD】We collected the root exudates using the water-culture method and the recycled water-resin extraction method, then comparatively assessed the allelopathy of root exudates to Medicago sativa L..【RESULTS】The root exudates from the two extraction methods have significantly inhibited the growth of its root and shoot. Among them, the relative allelopathic impacts of the water-culture method on the germination rate, germination index, root growth and shoot growth reached -0.18, -0.31, -0.21 and -0.30; Response Index (RI) of water-resin extraction method were -0.28, -0.32, -0.24 and -0.53, respectively.【CONCLUSION】The two methods had no obvious difference in the assessment potential allelopathy of A. adenophora’s root exudates. But compared with the recycled water-resin extraction method, water-culture method was simple, rapid and not so easily interferenced by environment, it is more suitable for assess the potential allelopathy of root exudates of A. adenophora.