Mountain marsh wetland mainly distributes at Daxing'an Mountain area and Xiaoxing'an Mountain area in the Northeast of China, it has great effect on adjusting the climate and improving ecosystem.

Analysis of wetland landscape pattern change and its driving mechanism in Jilin western part;

Effect of paddy field drainage on Carex lasiocarpa mire wetland;

N 2O concentration and its flux were measured in Sanjiang Plain wetland,from August to September in 2001,by using in situ closed chamber technique.

Effects of exogenous nitrogen input on the CH_4 and N_2O fluxes in freshwater marshes;

The ecosystem respiration was constrained by temperature,nutrient(particularly N) availability and plant growing-status in freshwater marshes.

To understand the influence of nitrogen fertilization on the carbon balance in the freshwater marshes,we measured the CO_2 and CH_4 emissions as well as net ecosystem exchange(NEE) of CO_2 using the static chamber and gas chromatogram technique in situ over Deyeuxia angustifolia wetland in Sanjiang Plain.

Dynamic changes of mire landscape in Northeast China;

N_2O flux from the mire in Ruoergai Plateau;

CO_2 fluxes in mire and grassland on Ruoergai plateau;

Seasonal dynamics of dissolved organic carbon and nitrogen and correlativity between their concentrations and methane flux in the freshwater marsh;

Effects of marsh reclamation on methane and nitrous oxide emissions;

Decomposition and nutrient dynamics of marsh litter in the Sanjiang Plain, China;

Methane emission from marsh wetland and methane concentration in near ground of the sanjiang plain,China;

Horizontal movement rule of nitrate nitrogen in Xianghai marsh wetland soil;

Space-time change of marsh wetland in Liaohe delta area and its ecological effect;