| NH3-N浓度对太湖竺山湾水体及沉积物中硝化作用的影响 |
| Effects of Different NH3-N Concentrations on the Nitrification Process in Waters |
| 投稿时间：2011-12-21 修订日期：2012-02-18 |
| DOI： |
| 中文关键词:非离子态氨 太湖 水体 沉积物 硝化作用 |
| 英文关键词:unionized ammonia Taihu Lake waters sediment nitrification process |
| 基金项目: 厦门理工学院引进高层次人才启动项目(YKJ09022R);厦门市科技计划项目(3502Z 20110016) |
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| 中文摘要: |
| 通过模拟培养试验,比较不同浓度非离子态氨(NH3-N)条件下,富营养化湖泊———太湖竺山湾水体及沉积物中硝化作用2个过程,即氨氧化和亚硝酸盐氧化的发生情况。结果表明,在试验设置的NH3-N浓度范围内,水体和沉积物中氨氧化速率都随着NH3-N浓度的升高显著增加(LSD检验,P<0.05),亚硝酸盐氧化速率却呈阶段性变化。水体中NH3-N浓度大于0.35 mg/L时,亚硝酸盐氧化速率开始显著降低(LSD检验,P<0.05),而氨氧化速率与亚硝酸盐氧化速率的比值从NH3-N浓度为0.15 mg/L开始随着NH3-N浓度的升高而显著增加,说明水体中亚硝酸盐氧化过程在NH3-N浓度为0.15 mg/L时已受到部分抑制;沉积物中亚硝酸盐氧化速率在NH3-N浓度大于0.65 mg/L时开始降低(LSD检验,P>0.05),而氨氧化速率与亚硝酸盐氧化速率的比值从NH3-N浓度为0.35 mg/L开始随着NH3-N浓度的升高而显著增加,说明沉积物中亚硝酸盐氧化过程在NH3-N浓度为0.35 mg/L时已受到部分抑制。太湖竺山湾水体中的NH3-N浓度为0.19 mg/L,已达到对亚硝酸盐氧化过程的抑制范围；沉积物间隙水中NH3-N浓度为0.16mg/L，还未对亚硝酸盐氧化过程产生抑制效果。 |
| 英文摘要: |
| Through the in-door simulation experiment，two processes of nitrification，namely ammonia oxidation and nitrite oxidation in water and sediment from Zhushan Bay of Taihu Lake were studied under different unionized ammonia (NH3-N)concentrations. The results showed that，in the range of ammonia concentrations designed in experiment，ammonia oxidation rates in water and sediment increased significantly with the increasing of NH3-N concentrations(LSD test，P<0.05).However, the occurrence of nitrite oxidation process had different stages. In water, nitrite oxidation rates started to decrease significantly(LSD test，P<0. OS)when NH:-N concentrations were more than 0. 35 mg/L. The ratio between ammonia oxidation rates to nitrite oxidation rates increase significantly when NH3-N concentrations were more than 0. 15 mg/L，indicating that nitrite oxidation rate has been partly inhibited when NH3-N concentration was 0. 15 mg/L. NH3-N concentration in the water of Zhushan Bay，Taihu Lake was 0. 19 mg/L which has achieved the range of inhibition to nitrite oxidation .In sediment，nitrite oxidation rates started to decrease(LSDtest，P>0.05) when NH3-N concentration were more than 0. 65 mg/L. The ratios between ammonia oxidation rates to nitrite oxidation rates increased significantly when NH3-N concentrations were more than 0. 35 mg/L, indicating that nitrite oxidation rate has been partly inhibited when NH3-N concentration was 0.35 mg/L. NH3-N concentration in the interstitial water of Zhushan Bay，Taihu Lake was 0.16mg/L which has not resulted in significant inhibition to nitrite oxidation. |
| 陈国元.2012.NH3-N浓度对太湖竺山湾水体及沉积物中硝化作用的影响[J].水生态学杂志,33(2):55-60. |
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