广东大中型供水水库的氮污染与富营养化分析

生态学杂志 ›› 2004, Vol. ›› Issue (3): 63-67.

广东大中型供水水库的氮污染与富营养化分析

徐宁, 段舜山, 林秋奇, 胡韧, 韩博平

暨南大学水生态科学研究所, 广州, 510632

收稿日期:2003-09-30 修回日期:2004-01-15 出版日期:2004-06-10
基金资助:
广东省科技攻关项目(2KM06103S);广东省水利厅基金资助项目

Analysis on nitrogen pollution and eutrophication of the large and medium reservoirs for water supply in Guangdong Province

XU Ning, DUAN Shunshan, LIN Qiuqi, HU Ren, HAN Boping

Institute of Ecosciences, Jinan University, Guangzhou 510632, China

Received:2003-09-30 Revised:2004-01-15 Online:2004-06-10

摘要/Abstract

摘要： 2000年丰水期和枯水期对广东大中型水库的氮污染和富营养化现状进行了调查。结果表明,在调查的20个大中型供水水库中,水质现状总体较好,70%的水库处于中营养状态以下,30%的水库开始出现富营养化现象。水库的总氮浓度普遍偏高,氮污染成为水库富营养化的重要原因。水库的总氮和DIN浓度存在地区性差异和季节性差异。枯水期水库的总氮及DIN浓度与叶绿素a的相关性极显著,而丰水期则无明显相关性。NO₃-N是水体无机氮的主要组成部分,平均占DIN的72.6%,而水库的NH₃-N含量明显低于NO₃-N,平均占DIN的25.5%。NO₂-N的含量一般很低。水库的总氮、DIN和有机氮含量是判断水库营养状态的重要指标,而NO₃-N和NH₃-N在DIN中所占比例则是推测污染物来源的重要依据.

关键词: 长期肥料试验, 作物产量, 水肥交互作用

Abstract: Investigation and monitoring on nitrogen pollution and eutrophication status of the large and medium reservoirs for water supply in Guangdong Province were carried out in flood season and dry season of 2000.Water temperature,DO,pH,chlorophyll a,COD_Mn,turbidity,TN,TP,NO₃-N,NH₃-N,NO₂-N and PO₄-P were determined synchronized with phytoplankton.The study revealed that the water quality of the reservoirs was still generally good.Among the 20 reservoirs,70% of them were situated in oligotrophic to medium trophic status,and 30% of them showed eutrophic features.The concentration of TN was generally higher,and nitrogen pollution was one of the important factors involved in eutrophication.TN and DIN fluctuated with the area as a result of the difference in character and environmental status.Seasonal dissimilarity existed too.Statistical analysis revealed that the concentrations of TN and DIN were positively related to chlorophyll a in dry season.However the relationship was not obvious in flooding season.As the primary composition of DINin water body,NO₃-N accounted for 72.6% of DINon the average.The concentration of NH₃-N was obviously lower than that of NO₃-N which constituted 25.5% of DIN on the average.The concentration of NO₂-N was relatively low.The concentration of TN,DINand organic nitrogen were important targets used to distinguish the trophic status of the reservoirs.And the percentage of NO₃-N and NH₃-N among DIN was important basis used to estimate the source of the pollution.

Key words: Long term fertilization trial, Crop yield, Water nutrient interaction

中图分类号:

Q178

徐宁, 段舜山, 林秋奇, 胡韧, 韩博平. 广东大中型供水水库的氮污染与富营养化分析[J]. 生态学杂志, 2004, (3): 63-67.

XU Ning, DUAN Shunshan, LIN Qiuqi, HU Ren, HAN Boping. Analysis on nitrogen pollution and eutrophication of the large and medium reservoirs for water supply in Guangdong Province[J]. cje, 2004, (3): 63-67.

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