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多数水生植物对于湿地土壤中氮磷元素的固持起着至关重要的作用。为了明晰芦苇与土壤间氮磷元素的关系,笔者利用灰色关联分析方法,对溱湖湿地芦苇各器官氮磷含量、季节动态及其与各土层氮磷含量之间的关联度进行了研究。结果表明:1芦苇各器官氮磷元素含量规律基本相同,即总氮含量叶>穗>根>茎,总磷含量叶>根>穗>茎;2由于芦苇根系的垂直分布特征,溱湖湿地芦苇与土壤氮磷元素交互关联主要集中在0~30 cm土层,说明土壤-植被系统固持水体营养元素过程主要集中在表层土壤中;3植物生长相对旺盛的春、夏季,土壤-植被系统氮磷元素交互作用主要出现在土壤表层,同时由于地下水位上升,≥45~60 cm土层也会对芦苇氮磷含量产生重要影响。
Most aquatic plants play a crucial role in the maintenance of nitrogen and phosphorus in wetland soils. In order to clarify the relationship between nitrogen and phosphorus in reeds and soil, the author used gray relational analysis method to study the relationship between nitrogen and phosphorus content, seasonal dynamics and nitrogen and phosphorus content of Phragmites australis in different areas. The results showed that: (1) The content of nitrogen and phosphorus in different parts of Phragmites australis was the same, that is, the total nitrogen content leaf> ear> root> stem, total phosphorus content leaf> root> ear> stem; 2 Due to the vertical distribution characteristics of Phragmites communis root, The interaction of nitrogen and phosphorus in reeds and soil mainly concentrated in 0 ~ 30 cm soil layer, indicating that soil nutrient elements in soil-vegetation system are mainly concentrated in the surface soil; 3 relatively strong spring growth of plants, summer, soil-plant system nitrogen Phosphorus interaction mainly occurs on the surface of the soil, and at the same time as the groundwater level rises, ≥45-60 cm soil layer will also have a significant impact on the nitrogen and phosphorus content of reed.