And the biomasses of ?Carex lanceolata,Bidens tripartita? that are dominants were 656.7kg/hm+2 and 462.1kg/hm+2,respectively,and totally 1118.8kg/hm+2 accounting for 15.81% in the total.

• 优势种披针苔草和狼把草的生物量分别是 6 5 6 .；7kg/ hm2 和 46 2