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刈割对人工湿地风车草生长及污水净化效果的影响
引用本文:吕改云,何怀东,杨丹菁,蔡信德,靖元孝.刈割对人工湿地风车草生长及污水净化效果的影响[J].生态学报,2012,32(15):4932-4939.
作者姓名:吕改云  何怀东  杨丹菁  蔡信德  靖元孝
作者单位:1. 华南师范大学生命科学学院,广东省高等学校生态与环境科学重点实验室,广州510631
2. 广州市环境保护科学研究院,广州,510620
3. 环境保护部华南环境科学研究所,广州,510655
基金项目:广东省攻关项目(2005B33302014)
摘    要:刈割对人工湿地植物的生长和净化作用的影响,国内外学者的意见存在分歧。实验于2010年7月至2011年1月在华南师范大学生物园进行。利用水池(2m×2m×0.6m)构建风车草人工湿地生活污水处理系统,研究了刈割对人工湿地风车草生长和污水净化效果的影响。结果表明,刈割组风车草在整个实验过程中均保持着良好的生长态势,而对照组在11月以后生长减缓。刈割组风车草2010年7月至2011年1月的累积地上生物量、累积地上氮磷含量以及新增分蘖数均大于对照组,表现为超补偿生长。刈割组风车草的叶绿素含量、净光合速率、蒸腾速率和气孔传导率均显著高于对照组。刈割组和对照组的TN、TP、NH4-N和NO3-N的平均去除率分别为77%、84%、64%、72%和65%、67%、55%、63%,前者显著大于后者。刈割组和对照组的CODcr和BOD5平均去除率分别为58%、79%和54%、76%,两者差异不显著。总之,刈割对人工湿地风车草的生长和污水净化效果有明显的促进作用,这可为风车草人工湿地的科学管理提供参考。

关 键 词:刈割  风车草  人工湿地  生长  污水净化
收稿时间:2011/7/18 0:00:00
修稿时间:2011/11/15 0:00:00

Cutting effects on growth and wastewater purification of Cyperus alternifolius in constructed wetland
LV Gaiyun,HE Huaidong,YANG Danjing,CAI Xinde and JING Yuanxiao.Cutting effects on growth and wastewater purification of Cyperus alternifolius in constructed wetland[J].Acta Ecologica Sinica,2012,32(15):4932-4939.
Authors:LV Gaiyun  HE Huaidong  YANG Danjing  CAI Xinde and JING Yuanxiao
Institution:Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, College of Life Science, South China Normal University, Guangzhou 510631 China;Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, College of Life Science, South China Normal University, Guangzhou 510631 China;Guangzhou Research Academy of Environmental Protection, Guangzhou 510620 China;Ministry of Environmental Protection, South China Institute of Environmental Sciences, Guangzhou 510655, China;Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, College of Life Science, South China Normal University, Guangzhou 510631 China
Abstract:There are ongoing debates about cutting effects on the growth and wastewater purification of plants in constructed wetlands. This experiment was carried out in the Biological Park, South China Normal University from July 2010 to January 2011. Constructed wetlands (2m×2m×0.6m) were grown with Cyperus alternifolius to assess cutting effects on growth and wastewater purification. The growth rate of C. alternifolius remained high for the treatment (cutting) group during the entire experiment period but was low for the control (no cutting) group after November 2010. At the end of the experiment, accumulated aboveground biomass, nitrogen and phosphorus contents, and new tillers from July 2010 to January 2011 in the treatment group were higher than those in the control group, and C. alternifolius showed overcompensation growth. The chlorophyll content, net photosynthetic rate, transpiration rate and stomatal conductance in the treatment group were evidently higher than those of the control group. The average removal rates of TP, TN, NH4-N and NO3-N in the treatment and the control group were 77%, 84%, 64%, 72% and 65%, 67%, 55%, 63%, respectively, which were significantly higher in the treatment than the control group. The average removal rates of CODcr and BOD5 in treatment and the control group were 58%, 79% and 54%, 76%, respectively, which were not significantly different. These findings suggested that a positive effect of cutting on growth and wastewater purification of C. alternifolius in constructed wetlands, which may provide insightful information on the management of constructed wetlands.
Keywords:Cutting  Cyperus alternifolius  Constructed wetland  Growth  Wastewater purification
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