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作 者 ：范国兰;李伟

期 刊 ：武汉植物学研究 2005年 23卷 3期 页码：267-271

关键词：沉水植物；穗花狐尾藻；富营养化；营养积累；分配对策；

Keywords:Sumerged macrophytes, Myriophyllum, Eutrophication, Nutrients accumuliation, Allocation strategy,

摘 要 ：通过对栽培于3个不同程度的富营养化水体(富营养化程度为水体1<水体2<水体3)中的穗花狐尾藻(MyriophyllumspicatumL.)进行研究,测定了不同时期植物体各个器官的氮磷含量及生物量分配,探讨了富营养化水对其营养积累及分配格局的影响。结果表明,重度富营养化的水体3中穗花狐尾藻组织中的氮含量显著高于其它两个水体;而由于水体1和水体2的氨态氮含量无显著差异,植物组织中的氮含量在水体1和水体2间无显著差异。富营养化程度高的水体2中植物磷的含量显著低于富营养化程度低的水体1中的植物,但在重度富营养化的水体3中,叶子的磷含量却远高于其它两个水体,这是由植物不同部位吸收的磷在各器官间分配不同所造成的。由于底泥的营养含量丰富,在3个不同程度的富营养化水体中,穗花狐尾藻的根冠比并未表现出明显差异。

Abstract:From May to September in 2003, Myriophyllum spicatum L.was cultured in three (waters) with different degrees of eutrophication(the eutrophic conditions were water 1M.spicatum contents phosphorus 3).The 24-N content in water 1 and water 2 was similar.Phosphorus content in tissues in low eutrophic water 1 was higher than that in water 2.But in hypereutrophic water 3,phosphorus content in leaves was higher than that in (eutrophic) water 1 and 2,which was due to the absorbed phosphorus by different organs were not allocated to each organ at the same ratio.R∶S ratios of M.spicatum showed no significant difference among different (eutrophic) water 1,2 and 3 for the same rich sediment.

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