Distributing Character of Soil Organic Matter in Salt Marsh of Spartina alterniflora Loisel

Spartina alterniflora Loisel is introduced from the U. S. A. to China and it is an adventitious species of plant to Chinese environment. Spartina alterniflora Loisel can occupy vast areas between mean sea level and mean high level, and it has influenced the coast environment deeply. In order to obtain the distributing character of the soil organic matter in the salt marsh of Spartina alterniflora Loisel, 8 deepness level soil samples on five spots on Jiangsu Dongtai tidal flat are collected, and the soil organic matter in the samples are analyzed, and it is found that, on the average the soil organic matter decreases 0.87 g/kg outward every 100 m, and decreases 0.05 g/kg downward every 1 cm. It is also found that the soil organic matter in the salt marsh of Spartina alterniflora Loisel has high correlation with its growth age, and has little correlation with its growth status.