Cutting effects on growth and wastewater purification ofCyperus alternifoliusin constructed wetland
| Autor: | 蔡信德 Cai Xinde, 何怀东 He Huaidong, 杨丹菁 Yang Danjing, 吕改云 Lv Gaiyun, 靖元孝 Jing Yuanxiao |
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| Rok vydání: | 2012 |
| Předmět: |
Stomatal conductance
geography geography.geographical_feature_category Ecology biology Phosphorus food and beverages chemistry.chemical_element Wetland biology.organism_classification Cyperus alternifolius chemistry.chemical_compound Animal science chemistry Wastewater Chlorophyll Constructed wetland Environmental science Growth rate Ecology Evolution Behavior and Systematics |
| Zdroj: | Acta Ecologica Sinica. 32:4932-4939 |
| ISSN: | 1000-0933 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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