三江平原典型环型湿地土壤营养元素的空间分异规律

以三江平原典型环型湿地作为研究对象,对其环带状植被区湿地土壤的全N、全P和全K的空间分异规律进行了初步研究。结果表明,环型湿地土壤化学元素具有明显的空间水平分异规律,全N和全P的含量由环型湿地中心向边缘逐渐减少,全K的含量逐渐增加。土壤化学元素的含量在垂直方向上具有明显的分层和富聚现象,自上而下全N含量除漂筏苔草群落外,其它各群落土壤全N含量呈先增加后减少的分布;大部分植物群落土壤全P含量呈先减后增的“V”型分布;全K含量呈表层和底层较高、中间层较低的“中空”状分布。环型湿地土壤的营养元素空间分异主要受生物过程和水文地貌过程影响,并通过过程影响湿地的功能

Study on Spatial Distribution of Soil Nutrient Elements of Annular Wetlands in Sanjiang Plain

Preliminarily spatial distribution of total nitrogen, total phosphorus and total potassium of circular distribution vegetation area of annular wetlands in Sanjiang Plain was investigated. The results showed that soil chemical element of annular wetlands had obvious horizontal difference law, that was, total nitrogen and total phosphorus content gradually lowered and total potassium content gradually raised from center to edge of annular wetlands. The soil chemical element of annular wetlands had obvious vertical difference law, that was, from top to bottom, the soil total nitrogen of five vegetation communities except Ass. Carex pseudocuraica increased first and then decreased; the total phosphorus and total potassium content of most vegetation communities decreased first and then increased. The spatial distribution of soil nutrient elements of annular wetlands was main effected by biological process and hydro-geomorphological process and determined function of ecosystem through structure.