Ground Cover Storage and Its Water Capacity of Wanglang National Nature Reserve in Western Sichuan

The ground cover storage (GCS) and its water capacity of 7 typical ecosystems,which were grass land (GL),shrub (SH),birch forest (BF),mixed forest (MF),fir forest (FF),spruce forest (SF) and cy- press forest (CF) of Wanglang national nature reserve (WNNR) in the subalpine of western Sichuan had been studied by field survey and water-immersing,and the regional GCS and ground cover water capacity (GCWC) of WNNR had been assessed.The results indicated that:(1)The differences of GCS and its water capacity in each ecosystem were obvious,and GCS's order was SFFFMFCFBFSHGL while GCWC's order was SFFFMFCFSHBFGL;(2)In the process of all ground covers' water ab- sorption,the relationships between GCWC (Q),water-absorbing speed (S) and immersed time (t) had been well simulated byQ=c ln(t)+d (R~20.9) and S=a t~(-b)(R~20.9);(3)GCS and GCWC of WNNR were 5.36×10~5 t and 2.20×10~6 t.With a view to vegetation restoration in subalpine of western Sichuan, this paper indicated that there was larger water conservation potential of ground cover in the climax (e.g.FF and SF) and mixed forest.