Correlative Research on the Activity of Enzyme and Soil Nutrient of Different Wetlands in Yellow River Delta

Correlative research was made on the activity of enzyme and soil nutrient of different wetlands in Yellow River Delta.The results show that soil organic content and great nutrient content change regularity as it far away from the sea.The enzyme activities of urease and catalase in wetland soils were almost in the same order,but the activity of soil peroxidase was on the contrary.Enzyme activities of soil were significantly related to soil nutrients.There were also correlations among different enzyme activities.So enzyme activities could be used as an index for soil fertility evaluation of wetlands covered with different vegetation in Yellow River Delta.