| 不同扰动下外源磷在形态磷间的分布规律 |
| 摘要点击 2301 全文点击 939 投稿时间：2017-04-17 修订日期：2017-05-31 |
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| 中文关键词 外源磷 扰动 磷转化 协同作用 分布 |
| 英文关键词 external phosphorus disturbances phosphorus transformation synergy distribution |
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| 中文摘要 |
| 研究了3种扰动方式对外源磷在上覆水、间隙水、底泥中的数量分布的影响，并分析了内源磷形态间的转化过程.结果表明，与对照实验相比，物理扰动能促进上覆水中磷向底泥迁移，并高于生物扰动和组合扰动的促进作用，并且，三者均高于对照实验.这可归因于溶解氧的渗入.物理扰动能降低间隙水中DIP的平均含量，相比对照实验降低了12.13%（第6 d和第10 d平均值），但降低程度不如生物扰动（38.63%）和组合扰动（50.79%）. 3种扰动均能促进Fe/Al-P和Ca-P的形成，其中，物理扰动下Fe/Al-P和Ca-P平均形成量最大，物理扰动下AAP含量一直在减小，暗示物理扰动明显促进了AAP向闭蓄态的Fe/Al-P或者Ca-P转化. |
| 英文摘要 |
| The distribution of external phosphorus (P) in the overlying water, pore water, and sediment under different disturbances were investigated and the transformation between internal P forms was analyzed. The results show that physical disturbances can promote the migration of external P from the overlying water to the sediment. In addition, the enhancement was even higher due to the bioturbation of the combined disturbances. Noticeably, the improvement of the P migration in the control was lowest, compared with the three disturbances. This may be attributed to the penetration of dissolved oxygen. Meanwhile, the physical disturbance reduced the average content of (dissolved organic phosphorus) DIP in the pore water by 12.13% (a mean of 6d and 10d), compared with the control. However the reduction was less than that associated with the bioturbation (38.63%) and the combined disturbance (50.79%), respectively. These three disturbances may promote the formation of Fe/Al-P and Ca-P. The formation of Fe/Al-P and Ca-P was largest under the physical disturbance. However, the algal-available phosphorus (AAP) is reduced due to the physical disturbance, suggesting that physical disturbance may promote the transformation of AAP to occluded Fe/Al-P or Ca-P. |
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