• 关键词：水陆交错带  湿地土壤  氮素  空间分异

• 基金项目：中国科学院湿地创新项目(KZCX2302);湖沼三期项目(ZKHZ0306)

• 白军红
• 中国科学院长春地理研究所湿地过程与环境开放实验室, 长春 130021

• 邓伟
• 中国科学院长春地理研究所湿地过程与环境开放实验室, 长春 130021

• 朱颜明
• 中国科学院长春地理研究所湿地过程与环境开放实验室, 长春 130021

• 王国平
• 中国科学院长春地理研究所湿地过程与环境开放实验室, 长春 130021

• 徐晓锋
• 中国科学院长春地理研究所湿地过程与环境开放实验室, 长春 130021

• 摘要：研究了氮素在水陆交错带的水平和垂直分异规律.结果表明表层土壤氮素水平分异显著高于下层(NH₄⁺-N除外)且随水分梯度分异;表层土壤各形态氮素含量基本上呈由近水体向高岗地带递减的分异趋势;但下层土壤氮素分异因形态不同而异, NO₃^--N含量由中间带向两侧递减, NH₄⁺-N变异方向则与表层变异相反, KN、ORN与TN分异趋势相似且与表层变异一致;NO₃<

• Abstract：The spatial variation of land/inland water ecotones(LWE)in the horizontal and vertical directions were studied. The results showed that the variation of nitrogen content in surface soil was greater than that in subsurface soil(except for NH₄⁺-N) and approximately varied with the moisture gradient; however, to subsurface soil, the variations of all forms of nitrogen were obviously different, i.e. NO₃^--N decreased from the middle to both sides, the variation of NH₄⁺-N was opposite to that in surface soil, and the tendency of variation of K N, OR N and TN was similar and consistent with that in surface soil; the spatial variation of NO₃^--N was the most distinct because it is easy to be removed and leached; NH₄⁺-N was easy adsorbed by the soil colloid and difficult to be leached, so its variance was the smallest, the pattern of spatial distribution of K N, OR N and TN was similar, LWE coued filtrate nitrogen in soil and the content of nitrogen strongly correlated with SOM and TP, however, was not distinctly influenced by pH value.

• Key words：wetland soil  nitrogen  spatial variation  LWE

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