Abstract:

The remaining ratio of litter decomposition， component contents of cellulose and lignin of Phragmites australis and Typha angustata in Dawenhe wetland were measured; Changing trend and the result of nutrient dynamics were analyzed. The results showed that : (1) With the litter decomposition of Phragmites australis and Typha angustata ，the changing tendency of decomposition ratio was similier but different in result.， it fell rapidly in Nov.~Jan ，and then declined gradually in Jan~Apr.， the last Apr~Aug.fell more rapidly. 2）Decomposition ratio in the upper layer was more rapidly than the lower layer(k value 0.003>0.002) ， Remaining of litter decomposition were FL42%，CL58%，FX38.2%，CX53.3%.