| 桑沟湾沉积物中磷的赋存形态及生物有效性 |
| 摘要点击 2600 全文点击 1464 投稿时间：2007-01-31 修订日期：2007-06-18 |
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| 中文关键词 沉积物 磷 赋存形态 生物有效性 桑沟湾 |
| 英文关键词 sediments phosphorous forms bioavailability Sungo Bay |
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| 中文摘要 |
| 以桑沟湾表层沉积物为研究对象，利用连续提取法对8个采样点沉积物中磷的赋存形态、含量及分布特征进行了研究，并探讨了磷的生物有效性.结果表明：①无机磷（IP）是桑沟湾表层沉积物中磷（TP）的主要形态，平均占总磷的73.33%，有机磷（OP）只占较小的比例.②无机磷中钙结合磷占的比例相对较大，平均占总磷的45.22%，是沉积物中磷的主要赋存形态，可交换磷、铁结合磷、碎屑磷占总磷的比例分别为9.92%、4.74%、13.46%.③对各形态磷的相关分析结果表明，总磷的含量及空间分布主要受有机磷的影响与控制(P<0.05)，无机磷受自生钙结合磷的影响较大(P<0.01).④磷的生物有效性分析结果表明，桑沟湾表层沉积物中潜在生物有效性磷的含量为358.05～448.39 μg/g，平均占总磷的86.54%，具有很强的释磷潜力. |
| 英文摘要 |
| Forms and bioavailability of phosphorus in the sediments of eight sampling sites from Sungo Bay were analyzed by means of sequential extraction method (SEDEX). Results showed that: ①The main form of total phosphorus (TP) in sediments was inorganic phosphorus (IP), which accounted for 73.33% and organic phosphorus (OP) was only the minor part. ②Among different forms of inorganic phosphorus, calcium-phosphorus (Ca-P) was the dominant forms, accounted for 45.22% of total phosphorus while organic phosphorus, adsorbed-phosphorus (Ads-P), iron-phosphorus (Fe-P) and detritus-phosphorus (Detr-P) was 26.67%, 9.92%, 4.74% and 13.46% respectively. ③The correlation analysis among different phosphorus forms suggested that the concentrations and distribution of total phosphorus were mainly controlled by organic phosphorus (P<0.05), while inorganic phosphorus was affected by calcium-phosphorus (P<0.01). ④Bioavailable phosphorus in sediments ranged from 358.05 μg/g to 448.39 μg/g and occupied 86.54% of the total phosphorus pool. |
