黄河下游溶解态营养盐季节变化及入海通量研究

发布时间：2017-12-26 19:40

本文关键词：黄河下游溶解态营养盐季节变化及入海通量研究　出处：《中国海洋大学学报(自然科学版)》2017年03期 　论文类型：期刊论文

【摘要】：根据在2010-04—2011-03期间在黄河利津站进行的观测结果,分析了黄河下游营养盐的月际变化,估算了黄河营养盐的入海通量。结果表明:观测期间溶解无机氮(DIN)、硝酸盐(NO_3~--N)、亚硝酸盐(NO_2~--N)和氨氮(NH_4~+-N)浓度的变化范围分别为190.4~361.3、177.1~332.5、0.74~13.81和2.27~26.44μmol/L,平均浓度为277.5、269.3、4.90和5.26μmol/L;磷酸盐和硅酸盐浓度的变化范围为0.027~0.138和92.5~146.0μmol/L,平均浓度分别为0.094和118.1μmol/L。DIN的浓度表现为枯水期含量高、丰水期含量低,而磷酸盐的变化与其相反;硝酸盐是黄河下游水体中溶解无机氮的主要组成部分,且溶解无机氮的入海通量主要由NO_3~--N贡献;磷酸盐浓度与径流量显著正相关;丰水期黄河向渤海输送的溶解无机态营养盐是全年输送通量的主要贡献者,营养盐通量的主要控制因素是径流量。
[Abstract]:According to the 2010-04 2011-03 in the Yellow River during the Lijin station observations were carried out in the analysis of the monthly variation of nutrients in the lower reaches of the Yellow River, estimates the fluxes of nutrients in the Yellow River. The results show that: during the observation period of dissolved inorganic nitrogen (DIN), nitrate (NO_3~--N), nitrite (NO_2~--N) and ammonia nitrogen (NH_4~+-N) concentration range were 190.4~361.3, 177.1~332.5, 0.74~13.81 and 2.27~26.44 mol/L, the average concentration of 277.5, 269.3, 4.90 and 5.26 mol/L; range of phosphate and silicate concentrations for 0.027~0.138 and 92.5~146.0 mol/L, the average concentrations were 0.094 and 118.1 mol/L. The concentration of DIN showed high content in dry season and rainy season and low content of phosphate changes opposite; nitrate is the main component of dissolved inorganic nitrogen in the lower reaches of the Yellow River in the water, and the fluxes of dissolved inorganic nitrogen is mainly contributed by NO_3~--N; significant positive correlation with the runoff concentration of phosphate; wet period to the Yellow River Bohai transport of dissolved inorganic nutrients is the main contribution of the transport flux, the main factor is the control of nutrient fluxes of runoff.
【作者单位】：中国海洋大学化学化工学院;
【基金】：国家自然科学基金项目(41276070)资助~~
【分类号】：P734
【正文快照】： 然科学版),2017,47(3):74-79.GU Wen-Yan,CHEN Hong-Tao,YAO Qing-Zhen,et al.Seasonal variation and fluxes of dissolved nutrients in the lowerreaches of the Huanghe[J].Periodical of Ocean University of China,2017,47(3):74-79.河流输送是河口及近海营养盐的主要来

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