Abstract: A simulation test was conducted to study the phosphorus (P) removal efficiency of Calamagrostis angustifolia wetland soil in Sanjiang Plain in different plant growth periods and removal stages, and the effects of P input on the P removal efficiency. The P removal efficiency was the highest in the maturing period of C. angustifolia, but no significant difference was observed among different growth periods. When the total phosphorus (TP)  input concentration increased from 10 mg·L^-1 to 20 mg·L^-1, the P removal efficiency enhanced, with the average removal efficiency being 4.56 and -0.71 mg·kg^-1·d^-1 in the early and midlate removal stages, respectively. When the TP input concentration was 20 mg·L^-1, the Premoval efficiency of 0-10, 10-20, and 2040 cm soil layers was 2.27, -0.87, and 0.51 mg·kg^-1·d^-1, respectively, but the difference was not significant.

Key words: Artificial grassland, Grass, Architecture, Small-scale pattern