摘要
本文讨论了1996年5月鸭绿江溶解无机氮的含量和分布变化特征，并同其他一些河口作了比较。鸭绿江口NO3-N、NO2-N、NH4-N的平均含量分别为50．3、0．45和3．05μmol／L；而丹东上游鸭绿江支流瑗河下游的溶解无机氮浓度很高，达203．4μmol／L，主要由农业施用氮肥大量从耕用地中流失所致。鸭绿江口NO3-N的行为是保守的，其分布主要受物理过程的影响。NO2-N、NH4-N在盐度≤5时，浓度随着盐度的增大而增大，表现出明显的再活化；而在盐度＞5时，其分布及趋于保守。
Based on the data collected in May 1996, this study summarizes the levels and distributions of dissolved inorganic nitrogen in Yalujiang estaury. The means of nitrate, nitrite and ammnia in Yalujiang estaury are 50. 3, 0. 45, 3 .05 μmol/L, separately; however, in Yalujiang'stribuary - Aihe, the concentration of dissolved inorganic nitrogen is high, up to 203. 4 μmol/L.This mainly results from the inputs of agriculture nitrogen. The concentration of nitrite and ammonia increase with the growth of salinity when salinity is less than 5; while salinity is more than5, its distribution shows conservation.
出处
《海洋环境科学》
CAS
CSCD
北大核心
1998年第3期35-39,共5页
Marine Environmental Science
基金
国家自然科学基金资!49736278和49576297
关键词
鸭绿江河口
溶解
无机氮
河口
水质监测
Yalujiang Estuary
dissolved inorganic nitrogen
behaviour
