| .沉积物扰动下太湖月亮湾中生物有效磷的变化规律[J].农业环境科学学报,2013,32(4):. |
| 沉积物扰动下太湖月亮湾中生物有效磷的变化规律 |
| Variation of Bioavailable Phosphorus in Yueliang Bay of Tai Lake Under Sediment Disturbance Conditions |
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| DOI：10.11654/jaes.2013.04.020 |
| 中文关键词: 藻类 生物有效磷 沉积物 月亮湾 |
| 英文关键词: algae bioavailable phosphorus sediment Yueliang Bay |
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| 摘要点击次数: 2610 |
| 全文下载次数: 1860 |
| 中文摘要: |
| 采用藻类吸收的方法，研究了太湖月亮湾沉积物在高强度扰动下，上覆水和悬浮物上生物有效磷（ＢＡＰ）的变化规律，并分析了溶解性总磷（ＤＴＰ）的生物有效性。结果表明，沉积物扰动导致上覆水中ＢＡＰ含量增加，但其却低于ＤＴＰ，说明ＤＴＰ中含有生物无效的磷。沉积物扰动下，悬浮物上ＢＡＰ呈降低趋势。通过悬浮物上ＢＡＰ含量来计算上覆水中可被生物利用颗粒态磷（ＢＡＰＰ），发现ＤＴＰ中具有生物有效性的磷占７７％左右。与化学方法相比，采用藻类吸收测得的上覆水和悬浮物上ＢＡＰ均较低，并且扰动过程中ＢＡＰ的变化趋势也明显不同。从而说明，以往研究可能过高地估计了内源磷释放对浅水湖泊富营养化的贡献。 |
| 英文摘要: |
| By using algae to determine the bioavailable phosphorus（BAP）, the variations of BAP in overlying water and on the suspended solids were investigated and the bioavailability of dissolved total phosphorus（DTP） was analyzed under repeated disturbance with high intensity, with the sediments and overlying water from Yueliang Bay in Tai Lake. The results showed that the concentrations of BAP in the overlying water increased due to sediment disturbance, but it was lower than DTP, indicating that part of DTP was not bioavailable. On the contrary, the concentrations of BAP on the suspended solids decreased under sediment disturbance, indicating that sediment disturbance could improve transformation of phosphorus from bioavailable forms to nonbioavailable forms on the suspended solids. Therefore, the bioavailability of particulate phosphorus decreased from 7%（7 d） to 2.5%（21 d） with the experiment time extending. It was calculated that the percentage of bio-DTP to DTP was 77%, using the concentrations of BAP on the suspended solids to determine the bioavailable particulate phosphorus（BAPP） in the overlying water. The BAP in the overlying water and on the suspended solids was lower marked using algae, compared with chemistry methods. Moreover, the trends of both BAP using algae were different from those using chemistry methods. It is suggested that the previous studies may overestimate the contribution of internal phosphorus release to eutrophication in shallow lakes. |
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