于2007年8月对珠江河口表层沉积物中有机氮和总氮含量分布特征进行研究.结果表明,珠江八大口门表层沉积物中总氮的含量变化范围为492.21～1 002.69 mg/kg ,平均含量为737.20 mg/kg .各口门上游总氮平均含量为756.85 mg/kg ,高于下游的717.56 mg/kg .东四口门总氮平均含量为609.75 mg/kg ,明显低于西四口门的864.66 mg/kg .有机氮含量的变化范围为271.90～ 521.76 mg/kg ,平均为370.47 mg/kg .有机氮是总氮的主要组分,占总氮的32.7%～64.5%,平均占55.6%.东四口门有机氮在总氮中所占的比例明显高于西四口门.%The content and distribution character of surface sediments organic nitrogen and total nitrogen in the Pearl River Estuary were studied in April of 2007.The results showed that the content of total nitrogen range from 492.21 mg/kg to 1 002.69 mg/kg, with the average content was 737.20 mg/kg.The content of total nitrogen in upstream (756.85 mg/kg) was higher than downstream (717.56 mg/kg).The content of total nitrogen in east four estuaries (609.75 mg/kg) was significantly lower than west four estuaries (864.66 mg/kg).The content of organic nitrogen was between 271.90 and 521.76 mg/kg, with the average of 70.47 mg/kg.Being the main component of the total nitrogen, the organic nitrogen accounted for 32.7%-64.5% of the total nitrogen, with the average of 55.6%.The relative abundance of organic nitrogen in east four estuaries was significantly higher than west four estuaries.
展开▼
