Effect of Plants Combination in Purifying Farmland Drainage

  • Songmin Li
  • Qingyun Zhou
  • Nana Han
  • Shuhong Sun
Conference paper
Part of the IFIP Advances in Information and Communication Technology book series (IFIPAICT, volume 509)


Drainage from farmland contains a lot of nitrogen and phosphorus, it is one of the important causes of water eutrophication. In order to reduce the concentration of nutrients before it discharged into receiving waters, 7 aquatic plants were selected to plant in outdoor planting box in the experiment, 5 different aquatic plant combinations were constructed, the removal effect of different combination was studied under same conditions, the reduction rule was researched, and the nitrogen and phosphorus in sediment were investigated. The results showed: after 49 days, the purifying effect of aquatic plants was significantly higher than that with no plant. Among them, the combination with Lythrum salicaria, Reed, Canna has the best effect in TN and TP removal, the removal rate reach: 90.98%, 95.95%, 98.46% respectively. Reductive process of total nitrogen, ammonia nitrogen and total phosphorus in water are accord with polynomial regression, the concentration decreased along with time increasing. When initial nitrogen and phosphorus content in sediment is higher, nitrogen and phosphorus in the sediment will decrease because of plants absorbing; whereas the initial sediment nitrogen and phosphorus content is low, nitrogen and phosphorus in the water can transfer into the sediment, at the same time, the water was purified.


Aquatic plants combination Farmland drainage Nitrogen and phosphorus Reduction Sediment 



This research was supported by the Major Science and Technology Program for Water Pollution Control and Treatment (2012ZX07101-008).


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Copyright information

© IFIP International Federation for Information Processing 2019

Authors and Affiliations

  • Songmin Li
    • 1
    • 2
  • Qingyun Zhou
    • 1
  • Nana Han
    • 1
  • Shuhong Sun
    • 1
  1. 1.Department of Water Conservancy EngineeringTianjin Agriculture UniversityTianjinChina
  2. 2.State Key Laboratory of Hydraulic Engineering Simulation and SafetyTianjin UniversityTianjinChina

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