黄河口新生湿地土壤氮磷分布特征研究

研究了黄河口新生湿地土壤中氮磷的分布特征,并进行了初步环境效应评价。结果表明,黄河口新生湿地土壤氮含量比较低,磷含量相对丰富;全氮分布水平变异系数较大,全磷变异系数较小;除裸滩外,土壤中氮含量垂直变异规律比较明显,土壤磷含量与土壤层次相关性普遍较差,只有滩涂碱蓬表现为异常。湿地土壤中氮磷含量均具有明显的季节动态特征。研究表明,黄河口新生湿地土壤中氮磷含量水平尚不会对近海环境产生富营养污染威胁。

Study on Distribution Characteristics of Soil Nitrogen and Phosphorus in New-born Wetland of Yellow River Estuary

This paper studies the distribution characteristic of soil nitrogen and phosphorus in the new-born wetland of the Yellow river estuary,and carries on the preliminary environmental impact assessment.The results indicated that in new-born wetland of Yellow River estuary soil nitrogen content is quite low,however,the phosphorus content is relatively rich.The horizontal variation coefficient of total nitrogen distribution is bigger than the total phosphorus.Besides mudflat,the vertical variable pattern of soil nitrogen content is quite obvious,but the relevance between soil phosphorus content and soil layer is generally worse.The treatment of tideland Suaeda gluca is only unusual.In the wetland soil,the nitrogen and phosphorus contents have an obvious seasonal dynamic variation characteristic.At present,the level of nitrogen and phosphorus contents can not bring eutrophication to the inshore environment in the new-born wetland of the Yellow river estuary.