Pollutant removal efficiency of sward buffers to runoff and the correlation with biomass

WU Jian-qiang, HUANG Shen-fa, WU Jian, XIONG Li-jun
2008 Journal of Lake Sciences  
To examine the pollutant removal efficiency of different sward buffers to runoff and the correlation with biomass, 5 native grasses were selected to construct buffer strips and conduct an experiment under the simulation of agricultural non-point pollution and rainfall characteristics in Shanghai. The results showed: 1) the clarification efficiency to runoff of sward buffers was significantly better than the blank control, the SS average retention rate of Cynodon dactylon buffer strip was the
more » ... er strip was the highest, up to 74%; 2) the TN and TP average removal rate of Trifolium repens buffer strip was the highest, up to 28% and 25%; 3) the clarification efficiency of Lolium perenne buffer was the lowest because of the high temperature; 4) the aboveground biomass of C. dactylon was 6.14kg/m 2 , and T. repens was 6.49kg/m 2 , higher than the other species; 5) the growth rate of C. dactylon was the fastest, whose biomass in September was almost as six times higher as in May; 6) the clarification efficiency of the sward was increased with higher biomass, there was a significant linear correlation between sward biomass and SS removal efficiency.
doi:10.18307/2008.0614 fatcat:evfga2nr6zcxtdeo5qro2prede