| 杭州西湖总氮、总磷周年变化与水体富营养化研究 |
| Study on the Annual variations of TN and TP and the Eutrophication in Hangzhou West Lake |
| 投稿时间：2010-02-23 修订日期：2010-02-23 |
| DOI： |
| 中文关键词:总氮 总磷 富营养化 杭州西湖 |
| 英文关键词:TN TP Eutrophication Hangzhou West Lake |
| 基金项目:国家自然科学基金（３０６７０２２２）；浙江省科技厅面上项目２００９Ｃ３３０６４。 |
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| 中文摘要: |
| ２００６年１０月～２００７年９月，对西湖５个主要湖区的８个样点水体的温度、溶解氧、ｐＨ、透明度、悬浮物、总氮、总磷、叶绿素ａ浓度等理化因子和藻类生物量进行测定和分析，讨论总氮、总磷与优势种藻类、藻类总量的平均浓度的关系。结果表明，总氮年平均值２．６３ｍｇ／Ｌ，变化范围０．１７～７．８８ｍｇ／Ｌ；总磷年平均值为０．０８７ｍｇ／Ｌ，
１０月最高，为０．１８７ｍｇ／Ｌ；叶绿素年平均值为２４．４９μｇ／Ｌ，最大值和最小值分别出现在２００７年７月（５０．５９μｇ／Ｌ）与２月（１．０９μｇ／Ｌ）。优势种藻类及藻类总量的平均浓度与总氮呈极显著负相关（Ｐ＜０.０１），与总磷呈显著正相关（Ｐ＜０．０５），总磷为西湖藻类增殖的主要限制因子。作为一个内源性污染的浅水富营养化湖泊，西湖的治理需要控制人为因素对水体的影响，减少底泥营养盐的再释放，尤其是降低可溶性磷酸盐的释放，从而抑制藻类的过量繁殖。
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| 英文摘要: |
| From Oct.2006 to Sep.2007，the physical and chemical factors of eight water sampling points from the five main parts of West Lake，including temperature，DO，pH，transparence，TSS(OSS and ISS)，TN，TP，concentration of Chla and the biomass of algae were measured and analyzed monthly. The relationships between average density of three dominant phytoplankton species and gross algae and TN，TP were discussed. The results showed that the concentrations of TN and TP were still rather high. The average TN was 2.63mg/L, and the variation range of TN was 0. 17-7. 88 mg/L; The average TP was 0.087mg/L，the maximum of TP was 0. 187 mg/L in Oct.，2006; and the average Chla was 24. 49 μg/L，the maximum of Chla was 50. 59μg/L in Jul. , 2007，and the minimum was 1 .09μg/L in Feb. ,2007. The main causation may be the release of nutrients caused by the disturbance on the sediment. Nitrogen and phosphorus are the main nutrient elements for phytoplankton. Result of the Pearson Correlation analysis(2-tailed ) showed that there was a high significant negative correlation between the average density of three dominant phytoplankton species(Merismopedia minima，Merismopedia tenuissima and Phormidiaceae tenue ) as well as total algae and TN(P<0.01); and then there was significant positive correlation between the average density of three dominant phytoplankton species as well as total algae and TP(P<0.05).So TP was the main limiting factor for the proliferation of algae. Once in an appropriate conditions of temperature，the high TP may result in a explosive growth of the phytoplankton. As a shallow lake with endogenous pollution eutrophication，in order to control the pollution of Hangzhou West Lake，we need to hold back the impact of man-made factors on the water body to reduce the release of nutrients from the sediment，especially soluble phosphorus，improve the transparency of the water volume，and restore the water environment fundamentally. |
| 毛成责,余雪芳,邵晓阳.2010.杭州西湖总氮、总磷周年变化与水体富营养化研究[J].水生态学杂志,31(4):1-7. |
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