Allelochemicals released by exotic plants can affect neighboring plants. In this study, we examined the effects of leachate extracted from shoots of an invasive clonal plant (Wedelia trilobata) on its own growth and performance, and that of its native congener (W. chinensis). Leachate from W. trilobata was prepared at concentrations of 0, 50, 75, and 100% and was applied to both Wedelia species (which were grown in mono and mixed culture). We monitored the effects of the leachate on plant growth, physiological traits, and relative competition intensity (RCI) in each species. Leachate concentration significantly affected the majority of growth and physiological traits in both species. Higher leachate concentrations significantly increased most traits of W. trilobata under mono and mixed culture. In contrast, many growth and physiological parameters in W. chinensis were significantly reduced in response to higher concentrations of leachate. Growth and physiological traits were higher in W. trilobata than W. chinensis at higher leachate concentrations in both mono and mixed culture. In W. trilobata, RCI significantly increased with increasing leachate concentration. However, RCI in W. chinensis remained consistently low in response to higher leachate concentrations. Overall, the addition of leachate from invasive W. trilobata had a strong allelopathic effect on native W. chinensis under mono and mixed culture. Conversely, growth and competitive ability in W. trilobata was enhanced in response to the leachate. Thus, allelochemicals from W. trilobata promote its own performance while simultaneously suppressing that of a native congener, which has likely contributed to its invasion success.

外来植物释放的化感物质会影响附近的植物。在这项研究中，我们检查了从入侵性克隆植物（Wedelia trilobata）的芽中提取的浸出液对其自身和天然同类植物（W. chinensis）的生长和性能的影响。从渗滤液W.蜞在0，50％，75％和100％的浓度制备，并施加给两蟛物种（在单一和混合培养中生长）。我们监测了渗滤液对每种物种中植物生长，生理特性和相对竞争强度（RCI）的影响。渗滤液的浓度显着影响两个物种的大多数生长和生理特性。在单一和混合培养下，较高的浸出液浓度显着增加了W. trilobata的大多数性状。相反，随着渗滤液浓度的增加，中华W的许多生长和生理参数均明显降低。生长和生理性状均高于W.蜞比W.红杉在单声道和混合培养高浓度渗滤液。在W. trilobata， RCI随着渗滤液浓度的增加而显着增加。但是，响应较高的沥出液浓度，中华R的RCI始终保持较低水平。总体而言，除了从侵入渗滤液W.菊对本地强烈的化感作用W.羊草下单声道和混合文化。相反，响应渗滤液，W。trilobata中的生长和竞争能力得到增强。因此，来自W. trilobata的化感化学物质在增强其自身性能的同时，还抑制了本地同类物的性能，这可能有助于其入侵成功。