水绵、光照、密度对入侵植物喜旱莲子草生长的影响
Effects of Spirogyra Communis, Sunlight and Density on the Growth of Invasive Plant Alternanthera Philoxeroides
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摘要: 对喜旱莲子草在不同光照、密度及有无水绵组合条件下的可塑性进行了研究。结果表明水绵的存在抑制了喜旱莲子草的生长,但由于光照和密度的作用弱化了水绵对喜旱莲子草的抑制作用。在有水绵“低光照”中密度条件下,喜旱莲子草的生物量指标和形态指标是所有处理中最大的。在一定程度上说明低光照、中密度增强了喜旱莲子草的入侵性。Abstract: The plasticity of Alternanthera philoxeroides was studied under the combined conditions of different lightit intensities and planting densities with and without Spirogypa communis. The results showed that Spirogyra communis growth of Alternanthera philoxeroides, but such inhibition could be reduced by the effects of light intensity and planting density. Under the conditions of low light intensity and median planting density with Spirogypa communis, the biomass indicator and morphological indicator of Alternanthera philoxeroides were maximal. Therefore, it could be concluded that the invasiveness of Alternanthera philoxeroides may be strengthened under the combined conditions of low light intensity and median planting density.
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Key words:
- Alternanthera Philoxeroides /
- Invasiveness /
- Plasticity /
- Spirogyra Communis /
- Light Intensity /
- Planting Density
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