商丘市地表水硝酸盐氮及亚硝酸盐氮分布特征

Distribution characteristics of nitrate nitrogen and nitrite nitrogen in the surface water of Shangqiu

通过对商丘市区主要地表水体中硝酸盐氮和亚硝酸盐氮含量的研究,探讨商丘市地表水硝酸盐氮和亚硝酸盐氮含量分布及变化特征.选择秋韵湖、万堤沟、南湖和蔡河4个地表水体进行调查研究,测定其硝酸盐氮和亚硝酸盐氮的含量,分析近4年来硝酸盐氮及亚硝酸盐氮含量的变化特征.结果表明,商丘市地表水体硝酸盐氮和亚硝酸盐氮含量存在区域差异且年度变化较为显著(P<0.05).万堤沟中硝酸盐氮含量显著高于南湖和蔡河(P<0.05);秋韵湖中的亚硝酸盐氮含量最高,且显著高于蔡河(P<0.05).近4年来,万堤沟、蔡河两地的硝酸盐氮含量呈上升趋势;秋韵湖和万堤沟两地的亚硝酸盐氮含量呈上升趋势,南湖的硝酸盐氮和亚硝酸盐氮含量均呈现下降趋势.商丘地区城镇化进程和农业的发展对地表水硝酸盐氮和亚硝酸盐含量的影响较为直接.

The aim of this study was to analyzethe content of Nitrate Nitrogen and Nitrite Nitrogen in the main surface water of Shangqiu,and to investigate the distribution and variation characteristics of Nitrate Nitrogen and Nitrite Nitrogen. Here,we selected four types of surface water,such as the Autumn Lake,Wandi Ditch,Cai River and South Lake as the research object,andmeasured the contents of Nitrate Nitrogen and Nitrite Nitrogen to analyze the variation characteristics of Nitrate Nitrogen and Nitrite Nitrogen in the past four years. The results showed that there were regional differences in the contents of Nitrate Nitrogen and Nitrite Nitrogen in the surface water of Shangqiu,and the annual change was significant( P < 0. 05). The content of Nitrate Nitrogen in Wandi Ditch was higher than that in the Cai River and the South Lake( P < 0. 05). The content of Nitrite Nitrogen in the Autumn lake were the highest,and was significant higher than that in the Cai River( P < 0. 05). In the past four years,the contents of Nitrate Nitrogen showed an upward trend in the Wandi Ditch and the Cai River; and the contents of Nitrite Nitrogen showed the same trend in the Autumn lake and the Wandi Ditch. However,the contents of Nitrate Nitrogen and Nitrite Nitrogen in the South Lake both showed a downward trend. The process of urbanization and the development of agriculture in Shangqiu have a direct impact on the contents of Nitrate Nitrogen and Nitrite Nitrogen in the surface water of Shangqiu.