"苦草"是个多义词，它可以指苦草（中药材）,苦草（中药）。
... 黑藻Hydrilla verticillata 苦草Vallisneria spiralls 水鳖Hydrocharis dubia ...
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朱伟等认为底质中的氨氮含量高于一定范围也可对苦草 （Vallisneria natans L）和伊乐藻 （Elodea nuttalli i）的生长产生抑制[19]。
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The biomass and dominance of Vallisneria natans have significantly positive correlation with dissolved oxygen.
苦草是生物量和优势度与溶解氧呈显著的正相关。
参考来源 - 水盾草（Cabomba caroliniana）入侵生态系统特征的研究The study is on the relationship among tilapia; Vallisneria spiralis and periphyton to find the response of artificial water-system to tilapia, and provide suggestions to the natural water-systems'management.
本文研究罗非鱼—附着藻类—苦草三者之间的相互关系,探讨人工环境下的水生态系统对罗非鱼的响应,并为水生态系统管理和修复提供参考。
参考来源 - 罗非鱼、附着藻类与沉水植物苦草关系的研究Analysis of water quality condition in different experimental treatments according to Merrow index,the suggested proper density of Vallisineria spiralis plant in pond water is 3.6 g/L.3.
采用内梅罗指数分析各实验组水质指标显示,在本实验条件下苦草种植密度为3.6g/L时净化效果最佳。
参考来源 - 精养鱼池水质生物净化的初步研究·2,447,543篇论文数据，部分数据来源于NoteExpress
刺苦草采用回避策略应对光照胁迫。
V. spinulosa adapted the change of light by means of refuging life-history strategy.
同样，沉积物再悬浮对苦草的分蘖和块茎数也产生了明显的影响；
Sediment resuspension also have negative effect on Potomogeton malaianus, but with a less degree comparing with its effect on Vallisneria natans.
对苦草的生长规律及其与水深、透明度之间的关系进行了初步分析与探讨。
The growth laws of Vallisineria spiralis and the relationship between its growth and water depth and transparency clarity are analyzed and studied.
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