Invasions of the aquatic weed pose a serious threat to native vegetation of soft water lakes, which increases the need for understanding the factors that regulate the success or failure of . Creating favorable conditions for native species seems promising to control , as previous research indicated that is a poor (root) competitor. We studied the development of growing together with the native (biomass, cover, tissue nutrient composition) at two different calcareous poor soil types (organic/acid, mineral/buffered) and under two different water tables (not inundated, submerged) in a greenhouse experiment. We found that when growing under submerged conditions, coexisted with and other native species without becoming dominant due to carbon limitation in the water layer. In contrast, we found that can easily become dominant over when growing on desiccated buffered fen soils with moderate nutrient availability. On the acidic/organic soils, development was poor and die-off was observed under both water level treatments, probably induced due to aluminum toxicity under a low acidity. These results indicate that creating oligotrophic and carbon-poor conditions are required for controlling . Restoration measures can preferably be taken before the onset of the rainy season and/or be followed by maintenance of a temporal artificial high water table to stimulate carbon limitation. Liming more or less organic shores could alleviate aluminum toxicity under acidic conditions which can potentially stimulate the development of

中文翻译：

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碳限制和铝毒性阻止了景天树在弱缓冲土壤上的优势

水草的入侵对软水湖的原生植被构成严重威胁，这增加了了解调节成功或失败的因素的必要性。为本地物种创造有利的条件似乎有希望控制，因为之前的研究表明这是一个较差的（根）竞争者。我们研究了在温室中两种不同的钙质贫瘠土壤类型（有机/酸性、矿物质/缓冲）和两种不同的地下水位（未淹没、淹没）下与本地植物（生物量、覆盖物、组织营养成分）一起生长的发展实验。我们发现，当在水下条件下生长时，由于水层中的碳限制，它们与其他本地物种共存，而没有成为优势物种。相比之下，我们发现，当在具有中等养分利用率的干燥缓冲沼泽土壤上生长时，很容易成为主导。在酸性/有机土壤上，在两种水位处理下均观察到发育不良并观察到死亡，这可能是由于低酸度下的铝毒性所致。这些结果表明，需要创造寡营养和贫碳条件来控制。优选地可以在雨季开始之前采取恢复措施和/或随后维持暂时的人工高地下水位以刺激碳限制。在有机海岸上施石灰或多或少可以减轻酸性条件下的铝毒性，这可能会刺激有机海岸的发展