| 扰动和加藻共同作用下太湖沉积物中形态磷变化规律 |
| 摘要点击 1474 全文点击 829 投稿时间：2015-05-10 修订日期：2015-07-12 |
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| 中文关键词 扰动 藻 磷 沉积物 迁移转化 太湖 |
| 英文关键词 disturbance algae phosphorus sediment migration and transformation Taihu Lake |
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| 中文摘要 |
| 为了阐明反复扰动下, 不同初始浓度藻对沉积物中各形态磷释放的影响. 以太湖梅梁湾沉积物和上覆水作为研究材料, 探讨了扰动和藻类共同作用下沉积物中各形态磷的变化规律. 结果表明, 无扰动状态下, NH4Cl-P和Res-P均有所降低, 而Fe/Al-P和Ca-P则有所增加. 其中, Ca-P随藻类初始浓度增加而增加, 分别增加48%、66%、74%. 但是, 扰动状态下, NH4Cl-P和Res-P也明显降低. Fe/Al-P明显增加, 其占总磷的百分比为66.2% (3组试验的平均值)高于不扰动状态(53.4%, 3组试验的平均值); 此外, Ca-P占总磷的百分比为24.1%(3组扰动试验的平均值)明显低于不扰动状态(33.0%, 3组试验的平均值). 这暗示了扰动和藻类共同作用下促进了Fe/Al-P的形成, 而无扰动下藻类却促进了Ca-P的形成. |
| 英文摘要 |
| Sedimentary phosphorus forms were investigated to clarify the release of sedimentary phosphorus forms under the repeated disturbance with the addition of algae at different initial concentrations. The sediments and overlying water were taken from the Meiliang Bay in Taihu Lake. The results showed that the concentrations of NH4Cl-P and Res-P decreased, while the content of Fe/Al-P and Ca-P increased without disturbance. In addition, the Ca-P increased with the increase of the initial concentration of algae and the net increase of Ca-P increased by 48% (30 μg ·L-1), 66% (60 μg ·L-1), 74% (120 μg ·L-1), respectively. However, under the disturbance, the NH4Cl-P and Res-P were significantly reduced, the Fe/Al-P increased significantly. The percentage of Fe/Al-P to Tot-P was up to 66.2% (average of the 3 experiments with the addition of algae of 30 μg ·L-1, 60 μg ·L-1 and 120 μg ·L-1), it was higher than the value (53.4%, average of the 3 experiments) without the disturbance. Moreover, under the disturbance, the percentage of Ca-P to Tot-P was 24.1% (average of the 3 experiments with the addition of algae of 30 μg ·L-1, 60 μg ·L-1 and 120 μg ·L-1) and it was slightly lower than that (33.0%, average of the 3 experiments) without the disturbance. It is suggested that the coexistence of disturbance and algae facilitated the formation of Fe/Al-P, but the algae accelerated the formation of Ca-P without disturbance. |
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