The Removal Rate of the Constituents of the Litters in the Aquatic Plant Ecosystems II. N, P, K, Ca and Na of the Litter in Phragmites longivalvis Grassland in the Deltaof the Nakdong River

수생식물 생태계에 있어서 낙엽의 구성성분의 유실률 II.낙동강 삼각주 지역의 갈대초지에 있어서 낙엽의 N,P,K,Ca 및 Na

Samples from the L, F, H and $A_1$ horizons of the Phragmites longivalvis grassland were collected in a delta of the Nakdong River and the removal rates of N, P, K, Ca and Na were investigated. The results obtained in this study can be abstracted as follows; The removal fractions of N, P, K, Ca and Na of the litter were 0.56, 1.22, 1.95, 0.65 and 0.53, respectively. The half times of N, P, K, Ca and Na required for the remove or accumulation of the litter on the grassland floor were 1.23, 0.57, 0.36, 1.06 and 1.32 years, respectively. The increasing order of the turnover parameters of the elements was Na, N, Ca, P and K.