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洱海湖滨带挺水植物残体腐解特征及其环境效应初探

叶碧碧 曹德菊 储昭升 庞 燕 李 浩 肖蓬蓬

叶碧碧, 曹德菊, 储昭升, 庞 燕, 李 浩, 肖蓬蓬. 洱海湖滨带挺水植物残体腐解特征及其环境效应初探[J]. 环境科学研究, 2011, 24(12): 1364-1369.
引用本文: 叶碧碧, 曹德菊, 储昭升, 庞 燕, 李 浩, 肖蓬蓬. 洱海湖滨带挺水植物残体腐解特征及其环境效应初探[J]. 环境科学研究, 2011, 24(12): 1364-1369.
YE Bi-bi, CAO De-ju, CHU Zhao-sheng, PANG Yan, LI Hao, XIAO Peng-peng. Decomposition Characteristics of Emergent Aquatic Plant Residues from the Lakeshore of Erhai Lake and their Environmental Effects[J]. Research of Environmental Sciences, 2011, 24(12): 1364-1369.
Citation: YE Bi-bi, CAO De-ju, CHU Zhao-sheng, PANG Yan, LI Hao, XIAO Peng-peng. Decomposition Characteristics of Emergent Aquatic Plant Residues from the Lakeshore of Erhai Lake and their Environmental Effects[J]. Research of Environmental Sciences, 2011, 24(12): 1364-1369.

洱海湖滨带挺水植物残体腐解特征及其环境效应初探

基金项目: 国家水体污染与治理科技重大专项(2008ZX07105-004)

Decomposition Characteristics of Emergent Aquatic Plant Residues from the Lakeshore of Erhai Lake and their Environmental Effects

  • 摘要: 采用试验模拟的方法,研究洱海4种主要挺水植物茭草(Zizania caduciflora)、香蒲(Typha latifolia)、水葱(Scirpus validus)和芦苇(Phragnites australis)在水体中的腐解特征. 结果表明:在21 d的腐解试验中,水葱腐解速率最快,茭草和香蒲其次,芦苇最慢; 挺水植物单位干物质TN释放量表现为水葱>茭草≈香蒲>芦苇,TP释放量表现为水葱>茭草>香蒲>芦苇; 4种植物TP释放率均高于TN,腐解出的TP进入水体的比例也明显高于TN. 水体中ρ(TN),ρ(TP)及ρ(CODCr)均在腐解初期(1~3 d)快速上升,pH和ρ(DO)快速下降; 随后,ρ(TN),ρ(TP)及ρ(CODCr)均缓慢下降,pH和ρ(DO)则缓慢回升. 结合洱海湖滨带挺水植物空间分布的调查结果,估算全湖湖滨带4种挺水植物中TN和TP的总质量分别为17.622和2.870 t,其中茭草和香蒲中的TN和TP分别占91%和95%,对茭草和香蒲进行适时、适宜的收割对改善湖滨带的水质具有重要的意义.

     

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出版历程
  • 收稿日期:  2011-03-19
  • 修回日期:  2011-05-08
  • 刊出日期:  2011-12-25

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