摘要
根据 1996年 12月及 1997年 7月调查廉州湾的资料 ,分析廉州湾水域五项营养盐 :NO3 - N、NO2 - N、NH4- N、PO4- P、Si O3 - Si的含量分布特征 ,并对五项营养盐与其它环境因子之间进行相关分析。结果表明 :廉州湾水域 NO3 - N、NO2 - N、PO4- P和 Si O3 -Si均具有丰水期明显高于枯水期的分布特征 ,NH4- N则与此相反。影响枯水期营养盐含量的主要因素是以江河径流影响为主、沿岸排污和水体自身再生补充影响为辅 ;但在丰水期 ,只有 NO-3 、NO-2 与盐度之间呈良好负相关关系 (相关系数分别为 r=- 0 .80 5和 r=- 0 .76 6 ,n =7) ,其它三项营养盐与盐度及其它环境因子均呈不相关关系 。
The distribution of contents of five nutrients is analyzed based on the investigation of December 1996 and July 1997 in Lianzhou Bay of Guangxi.The correlation analysis of the five nutrients (including NO\-3-N?NO\-2-N?NH\-4-N?PO\-4-P?SiO\-3-Si)and environmental factors is conducted.The contents of NO 3 -N?NO 2 -N?PO 4 -P and SiO 3 -Si in high water discharge period are higher than that in low water discharge period,and reverses for NH 4 -N.The river runoff is the key factor affecting the contents of nutrients in low water discharge period.The sewage from shore and water self recycle also have some influence.In high water discharge period,there is good negative correlativity of NO - 3 ?NO - 2 to salinity(r=-0 805,r=-0 766,respectively,n=7),and no correlativity of PO - 4 and SiO - 3 to salinity.The results reveal the joint influence of runoff after heavy raining and sweage drainage from shore land.
出处
《广西科学院学报》
2003年第1期35-39,共5页
Journal of Guangxi Academy of Sciences
