北固山湿地土壤金属元素空间分布与变化

镇江北固山湿地是一滨江湿地，遭受季节性的淹水，它的优势植物是芦苇和藃草，为了研究不同植物对湿地土壤不同营养元素的运转和分配的影响，对不同植被下土壤营养元素的空间分布进行了分析．通过不同植被下土壤金属元素的相关分析可以看出，该湿地的土壤具有较好的同源性．通过比较春季和秋季的不同植被下不同层次的土壤金属元素有效态含量可以看出，不同的植物对土壤有效钾、钠、钙、铜、锌、铁、锰的空间分布有着差异显著的影响，这是因为植物的根系分布和活力而造成的．土壤有效镁的空间分布不存在春秋两季的差异．研究结果为滨江湿地生态恢复和生态清淤提供参考．

Spatial distribution and change of metal elements in soil in Mount Beigu wetland

The Mount Beigu wetland is nearby Yangtze River, which undergoes seasonal flooding, and its dominant plants are Phragmites communis and Phalaris arundinacea. In order to study the effect of transference and distribution of nutrition elements on the wetland soil with different plants, spatial distribution on nutrition elements in the soil with different vegetation is analyzed. It is found that the soil of the wetland has better homology through relevant analysis of the content of metal element of soil with different vegetation. There are remarkable differences among spatial distribution of metal elements in soil with different vegetation according to analysis of the content of effective potassium, sodium, calcium, copper, zinc, iron, and manganese in soil with different vegetation in spring and autumn. It relates to the distribution and activities of root system of the plant. No remarkable differences between spring and autumn occur in spatial distribution of effective magnesium of soil with different vegetation.These results provide references to ecological recovery and purging silt on nearby-river wetland.