大通湖主要营养盐类的变化规律

The Change Laws of Main Nutritional Salts in Datong Lake

[目的]了解大通湖水质中营养盐类的月变化特征以及各营养盐之间的相关关系。[方法]2015年6～9月对大通湖3个区域湖水的氨氮、亚硝酸氮、硝酸氮、可溶性磷酸盐的月变化特征进行了研究,并对大通湖水体各营养盐间的关系等进行了分析。[结果]大通湖湖水氨氮和可溶性磷含量在6月最低,9月最高;硝酸氮含量在6月最低,7月最高;亚硝酸氮含量在7月最低。氨氮与可溶性磷酸盐含量呈正相关关系,硝酸氮含量呈递增趋势,亚硝酸氮含量较为稳定。[结论]该研究为大通湖的开发与利用提供参考依据。

[Objective] To understand the monthly change characteristics of nutritional salts in water of Datong Lake and the relationships among different nutritional salts. [Method] The monthly change characteristics of ammonia nitrogen,nitrite nitrogen,nitrate nitrogen,soluble phosphate in the water of three regions of Datong Lake were studied from June to September of 2015. And the relationships among different nutritional salts in the water of Datong Lake were analyzed. [Result] The contents of ammonia nitrogen and soluble phosphorus in the water of Datong Lake reached the minimum values in June,but they reached the maximum values in September. The content of nitrate nitrogen was the lowest in June,but it was the highest in July. The content of nitrite nitrogen was the lowest in July. The content of ammonia nitrogen showed a positive correlation with soluble phosphorus. The content of nitrate nitrogen showed an increasing trend,but the nitrite content was stable.[Conclusion]The research can provide reference basis for the development and utilization of Datong Lake.