| 小西淀穗花狐尾藻的生长特性与氮磷吸收规律研究 |
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| 投稿时间：2012-09-01 修订日期：2012-11-20 |
| DOI： |
| 中文关键词:小西淀 穗花狐尾藻 氮磷吸收规律 |
| 英文关键词:Xiaoxidian Myriophyllum spicatum Nitrogen and phosphorus accumulation |
| 基金项目:国家水体污染控制与治理科技重大专项资助(2008ZX07209-008-05) |
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| 中文摘要: |
| 2011年4-9月,对白洋淀的小西淀穗花狐尾藻(Myriophyllum spicatum)的生长参数、植物体各构件氮磷含量及其生长水体的理化因子进行了测定,分析了穗花狐尾藻的氮磷吸收规律。结果表明,穗花狐尾藻的株高与生物量均随着时间的推移而增长,种群的生长始于3月底或4月初,终于9月底,主要生长期在6-8月。植物体内的全氮和全磷含量呈现出先增长后下降的趋势,在其生长旺期的6-8月保持了较高的水平。叶的氮、磷积累量最大,茎和根次之。穗花狐尾藻植物体的氮磷积累量最大值均出现在7月,分别为9.10g/m2和1.08g/m2。穗花狐尾藻的氮磷积累量与水体中的总氮呈显著负相关,与总磷含量呈负相关,与透明度呈显著正相关,表明穗花狐尾藻具有较强的净水功能。8月末,狐尾藻大面积腐烂,水体中的氮、磷含量开始增加,致使透明度降低。建议在植物生长旺季将植物体迁出水体,以防造成水体的二次污染。 |
| 英文摘要: |
| In order to explore growth characteristics and accumulation regulation of nitrogen and phosphorus of Myriophyllum spicatum，some growth indices and contents of nitrogen and phosphorus of M. spicatum and physicchemical factors of water body were determined in Xiaoxidian belonging to Baiyang Lake from April to September2011.The results showed : plant height and biomass of M. spicatum increased over time ; population growth began in late March and early April，prevailed between June and August，and ended in September; total nitrogen and total phosphorus contents of M. .spicatum presented a high level from June to August，corresponding to the main growing periods ; accumulation of nitrogen and phosphorus was the highest in leaf, and then stem and root ; the highest accumulation of nitrogen and phosphorus in M. spicatum happened in July，and their contents were 9.10 g/m2 and1 .08 g/m2，respectively ; nitrogen and phosphorus accumulation of M. spicatum had a negative correlation with the nitrogen and phosphorus concentration in water, a positive correlation with water transparency，which proved that M. spicatum could purify water; in late August，large areas of M. spicatum decayed，water nitrogen and phosphorus concentrations began to increase，resulting in the decline of water transparency. In conclusion，there was a suggestion that M. spicatum should be harvested in the growth period for avoiding the secondary pollution of water. |
| 苏倩,刘存歧,杨 军,吴亦红,王靖飞.2012.小西淀穗花狐尾藻的生长特性与氮磷吸收规律研究[J].水生态学杂志,33(6):50-55. |
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