鄱阳湖不同形态氮的时空分布特征
The Temporal and Spatial Distribution Characteristics of Different Species Nitrogen in Poyang Lake

通过调查鄱阳湖2010年水体中硝酸盐氮、氨氮及总氮浓度,分析不同形态氮的时空分布特征,并采用相关性分析法分析了2010年硝酸盐氮、氨氮及总氮三者的关系.结果表明:在时间分布上,2010年鄱阳湖水体总氮含量年平均值是1.50 mg/L,硝酸盐氮含量平均值为0.84 mg/L,氨氮含量年平均值是0.37 mg/L,丰水期不同形态氮的含量均明显低于枯水期；在空间分布上,枯水期硝酸盐氮、氨氮主航道中游含量较高,上、下游稍低.用相关性分析法分析知,2010年硝酸盐氮与总氮之间有显著的相关性,关联度分别达到0.99和0.95.减少硝酸盐氮与氨氮的输人有利于对富营养化的控制.
According to analyzing the content of nitrogen ( ), ammonia nitrogen ( ) and total nitrogen (TN) in 2010 of Poyang Lake, the temporal and spatial distribution characteristics of three species nitrogen were discussed, based on the correlation analysis, the relationship among , NH4+ and TN in 2010 was analyzed. The results showed that the average content of TN was 1.50 mg/L, the value of was 0.84 mg/L, the average content of was 0.37 mg/L, the content of three species in the wet season was lower than in the dry season for temporal distribution; for spatial distribution characteristic, the and was higher in the main channel, but lower than it in the upstream and downstream for spatial distribution; based on the correlation analysis, the result showed that the correlation between the and TN was significant with the value 0.99、0.95, the reduction of and was good for the control of eutrophication