ZHAO Yibo, YIN Zhao, SHI Changqing, et al. Study on Pollutant Purification Capacity of Riparian Vegetation Zone in Daqing River Basin[J]. 2022, 36(5): 130-135.
DOI:
ZHAO Yibo, YIN Zhao, SHI Changqing, et al. Study on Pollutant Purification Capacity of Riparian Vegetation Zone in Daqing River Basin[J]. 2022, 36(5): 130-135. DOI: 10.13870/j.cnki.stbcxb.2022.05.018.
Study on Pollutant Purification Capacity of Riparian Vegetation Zone in Daqing River Basin
In order to solve the problems of single vegetation type and low ecological function in the riparian zone in the upper reaches of Baiyangdian Lake
starting from the ecological function orientation of intercepting and purifying non-point source pollutants in the riparian vegetation zone
two kinds of herbs and one kind of shrub were selected as the research object to study the purification effect of riparian vegetation zone on nitrogen
phosphorus and sediment pollutants through a simulated runoff scouring test. The results were as follows: (1) Compared with single shrub
the purification efficiency of single herb was better
and the purification efficiency of total phosphorus
total nitrogen and sediment of Cynodon dactylon was the best
which were 10.88%
6.96% and 34.20% respectively; Lolium perenne had good purification effects on ammonia nitrogen and nitrate nitrogen
which were 10.11% and 9.54% respectively; (2) Among the multiple plant configurations
the purification efficiency of grass shrub combination of Lespedeza bicolor
Cynodon dactylon and Lolium perenne was better
and the average values of various indexes were increased by 13.31%
10.84%
9.64%
12.36% and 46.43% respectively compared with the bare soil; (3) The plant combination of shrub&herbs and mixed herbs had higher purification efficiency for five pollutant indexes
and the removal effect of mixed plant group was better than that of single plant group. In conclusion
riparian vegetation zone had purification effect on surface source pollution
among which the combination of shrub&herbs and mixed herbs had a better purification effect. The combination of grass and shrub plants of Lespedeza bicolor
Cynodon dactylon and Lolium perenne showed the best purification effect.
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