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沉水植物腐解对水体水质的影响

张来甲 叶春 李春华 宋祥甫

张来甲, 叶春, 李春华, 宋祥甫. 沉水植物腐解对水体水质的影响[J]. 环境科学研究, 2013, 26(2): 145-151.
引用本文: 张来甲, 叶春, 李春华, 宋祥甫. 沉水植物腐解对水体水质的影响[J]. 环境科学研究, 2013, 26(2): 145-151.
ZHANG Lai-jia, YE Chun, LI Chun-hua, SONG Xiang-fu. The Effect of Submerged Macrophytes Decomposition on Water Quality[J]. Research of Environmental Sciences, 2013, 26(2): 145-151.
Citation: ZHANG Lai-jia, YE Chun, LI Chun-hua, SONG Xiang-fu. The Effect of Submerged Macrophytes Decomposition on Water Quality[J]. Research of Environmental Sciences, 2013, 26(2): 145-151.

沉水植物腐解对水体水质的影响

基金项目: 国家自然科学基金项目(40971277);国家水体污染控制与治理科技重大专项(2012ZX07101-009)

The Effect of Submerged Macrophytes Decomposition on Water Quality

  • 摘要: 在玻璃温室大棚内,模拟太湖的水、土、植物情况,研究了苦草在衰亡腐解过程中营养盐的释放规律以及对水体水质的影响,并初步探讨了其影响机理. 在初始生物量为689g/m2的条件下,苦草衰亡与腐烂分解对水体水质的影响呈2个阶段. 第1阶段为10月—翌年2月寒冷的秋、冬季节,表现为降解释放过程,但这一过程向水体及底泥中释放的碳、氮、磷较少,大部分碳、氮、磷仍保留在苦草残体中,水体pH及ρ(DO)也没有明显的变化. 第2阶段为3—4月天气回暖后,苦草残体的腐解速率急剧加快,向水体及底泥释放大量营养盐;3月水体TOC、TN、TP总量较2月分别增长了216.64%、60.96%、144.40%,底泥中TOC、TN、TP总量分别增长了31.20%、9.41%、19.99%;pH增长了6.27%,ρ(DO)降低了91.5%. 沉水植物腐解过程中各营养盐的赋存形态不断发生转化,并在水-底泥-植物三者间进行迁移.

     

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出版历程
  • 收稿日期:  2012-10-11
  • 修回日期:  2012-12-12
  • 刊出日期:  2013-02-25

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