摘要
据1992—1999年的水质监测数据,对黄河花园口影响无机氮形态组成的多个因子进行灰色关联度分析.结果表明:水温是影响黄河水体无机氮形态组成的首要限制性因素,水温的变化与氨氮(AN)、总无机氮(TIN)中氮元素质量比(m(AN)/m(TIN))呈负相关.悬浮物对m(AN)/m(TIN)的影响仅次于水温,且在不同水期的影响性质不同:在丰水期悬浮物主要来源于上游土壤侵蚀,与m(AN)/m(TIN)呈负相关,体现出颗粒物对AN的吸附和硝化过程的促进作用;而在枯水期悬浮物则主要来源于河道沉积物的再悬浮作用,与m(AN)/m(TIN)呈正相关,表现出颗粒物对AN的释放及对硝化过程的抑制作用.确定水体中的溶解氧(DO)、pH值较适于AN的硝化,不是影响黄河水体m(AN)/m(TIN)的限制性因素.
Based on the water quality data from 1992 to 1999, Grey Incidence Analysis is used to analyze factors which may have influence on the speciation of inorganic nitrogen. It is revealed that water temperature is the most restrictive factor for the speciation of inorganic nitrogen; it is negatively correlated with the ratio of total ammonia-nitrogen to total inorganic nitrogen contents （m（AN）/m（TIN））. Suspended particle is the second restrictive factor; it has different influences in different seasons. In flood season, suspended particle is negatively correlated with m（AN）/m（TIN）. The suspended particles, which mainly come from the upper and middle reaches, would lead to the sorption of ammonia-nitrogen and the acceleration of nitrification. In dry season, the suspended particles originated from the re-suspension of sediment would result in the release of ammonia nitrogen from particles and restraining effect on nitrification. Therefore, suspended particle is positively correlated with rn（AN）/m（TIN）. As the dissolved oxygen and pH value are suitable for nitrification in the Yellow River; They are not restrictive factors.
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2005年第6期632-635,共4页
Journal of Beijing Normal University(Natural Science)
基金
国家自然科学基金委员会
水利部黄河水利委员会黄河联合研究基金资助项目(50239010)
国家自然科学基金资助项目(40201046)
关键词
无机氮
氨氮
悬浮物
灰色关联分析
黄河
inorganic nitrogen
ammonia nitrogen
suspended particles
grey incidence analysis
Yellow River
