[1]GAO Song-feng,YANG Qian-qi.Selection of Aquatic Plants in the Purification System of a Pre-dam[J].Research of Soil and Water Conservation,2013,20(06):182-187.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
20
Number of periods:
2013 06
Page number:
182-187
Column:
Public date:
2013-12-28
- Title:
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Selection of Aquatic Plants in the Purification System of a Pre-dam
- Author(s):
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GAO Song-feng1, YANG Qian-qi2
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1. Jiangsu Provincial Academy of Environmental Science, Nanjing 210036, China;
2. Nanjing University of Science and Technology, Nanjing 210094, China
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- Keywords:
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pre-dam; the purification system; aquatic plants; selection
- CLC:
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X171.4
- DOI:
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- Abstract:
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Aquatic plants are the main transmission of material and energy in aquatic ecosystems; the changes of its types and population have the important influence on ecology and water environmental quality. The effect of aquatic plants on the polluted water was studied. Results showed that the N concentration in water column was the first influence factor to nitrogen content containing in Elodea nuttallii, and the N form was the first influence factor to nitrogen content containing in Potamogetor crispus, the N/P was the first influence factor to phosphorus content containing in Elodea nuttallii and Potamogetor crispus, the relative growth rate of water dropwort and Elodea nuttallii were 48.5%~92.2% and 43%~94.2%, growth was the best. Elodea nuttallii showed that the effects were acted as reducing turbidity(the highest pure reduction rate was 87.9%), enriching oxygen(the highest pure increasing quantity was 3.3 mg/L), and reducing nutrients (the highest pure reduction rate of TN was 43.0%). The removal rates of TN, TP和NH4+-N by water celery was the best, the average removal rate reached up to more than 26%.Therefore, water celery among the aquatic plants was considered as waterweed for submerged plant species throughout the year, and proper combination with other plants formed the plant community in the purification system. Water celery and Elodea nuttallii were regarded as waterweed for submerged plant species of the purification system of a pre-dam in the whole year. The result provides technical support for the construction of the pre-dam.