中文摘要：

以向海湿地为研究对象，研究了封闭性湿地和开放性湿地土壤全氮含量的季节动态变化特征及其氮储量。结果表明，封闭性湿地与开放性湿地土壤全氮含量的季节动态变化过程既存在差异，又具有一定的相似性，2个典型区各层土壤中全氮含量均可采用四次多项式拟合进行动态模拟。封闭性湿地与开放性湿地土壤氮密度均由表层向下逐渐下降，二者1m深的土壤氮密度分别为0．95和1．05kg／m^2，其中40cm以上土层的贡献率均达到66％以上。

英文摘要：

The Fulaowenpao and Erbaifangzi wetlands were chosen as typical sites to study the characteristics of seasonal dynamics of total nitrogen in marsh soils from both closed and open wetlands. There were both differences and similarities in the total nitrogen contents of both wetlands. Total nitrogen contents of soils from each soil layer were be fitted by three order polynomials, and these models gave a good fit, reflecting the changing seasonal dynamics of total nitrogen contents in soils. The nitrogen densities in the 1 m depth of the closed and open wetlands were 0.95 and 1.05 kg/m^2 , respectively. The contributing rates of soil layers above 40 cm accounted for more than 66% of the differences