In present study,effects of H₂SO₄,plant growth regulators and cold stratification treatment on seed germination of Kobresia myosuroides,Carex atrata,Scirpus triqueter and Carex duriuscula were investigated.The results showed:(1)Seeds of four Cyperaceae species exhibited physiological dormancy with different type,e.g.K.myosuroides exhibited non-deep physiological dormancy,C.atrata exhibited intermediate physiological dormancy,S.triqueter and C.duriuscula exhibited deep physiological dormancy.(2) Sulfuric acid soaking significantly improved seed germination of K.myosuroides and C.atrata,and with the soaking time increasing,seed germination firstly increased and then decreased,and the maximum germination rate were 86% and 77% respectively.However,for S.triqueter and C.duriuscula,H₂SO₄ soaking have no effect on seed germination.(3)Exogenous gibberellin (GA₃),fluridone (FL) and potassium nitrate (KNO₃) significantly improved seed germination of K.myosuroides,but showed no effect on the other three species.However,GA₃,FL can significantly increase germination of C.atrata seed after H₂SO₄ scarification.(4)Effects of cold stratification on seed germination varied with stratification time and species.E.g.seed germination of K.myosuroides was significantly improved throuyh 2 months’ stratification,but improvement of S.triqueter seed germination need 4 months’ stratification;more than 6 months’ stratification can significantly improve seed germination of all tested species,and the final germination rates of K.myosuroides,C.atrata,S.triqueter and C.duriuscula after 6 months’ cold stratification were 90%,73%,17% and 7%,respectively.