大亚湾沉积物磷的形态特征及其潜在可释放性

发布时间：2018-09-07 10:30

【摘要】：为了认知沉积物磷释放对海湾磷负荷的影响,本文以SMT分级方法分析了大亚湾表层沉积物中磷的形态结构,探讨了沉积物磷的释放潜力的时空性差异及其影响因素。结果表明,大亚湾沉积物中总磷(TP)的平均含量为429.65×10~(-6),无机磷(IP)、有机磷(OP)的平均含量分别为286.57×10~(-6)和143.08×10~(-6),IP占TP的67.83%;IP以酸提取态磷(HCl-P)为主,HCl-P的平均含量为237.10×10~(-6),碱提取态磷(Na OH-P)的平均含量为56.13×10~(-6);生物有效磷(OP+Na OH-P)占到总磷的45.63%。大亚湾沉积物磷具有较高的释放潜力,并呈现出夏季高于冬季,近岸区域高于湾中心及湾口的变化规律。相关性分析表明,沉积物粒径、氧化还原电位及有机质含量(尤其是浮游藻类的自生有机质)对沉积物磷的释放潜力有较大影响。
[Abstract]:In order to understand the effect of sediment phosphorus release on phosphorus loading in the Gulf, the morphological structure of phosphorus in surface sediments of Daya Bay was analyzed by SMT classification method, and the temporal and spatial differences of phosphorus release potential in sediments and its influencing factors were discussed. The results show that The average content of total phosphorus (TP) in sediment of Daya Bay is 429.65 脳 10 ~ (-6), the average content of inorganic phosphorus (IP), organic phosphorus (OP) is 286.57 脳 10 ~ (-6) and 143.08 脳 10 ~ (-6) IP accounts for 67.83% of TP. The average content of HCl-P in TP is 237.10 脳 10 ~ (-6). The average content of alkaline extracted phosphorus (Na OH-P) is 237.10 脳 10 ~ (-6). 56.13 脳 10 ~ (-6) and bioavailable phosphorus (OP Na OH-P) accounted for 45.63% of total phosphorus. The phosphorus release potential of sediment in Daya Bay is higher than that in winter, and the variation of phosphorus in the coastal area is higher than that in the center of the bay and the mouth of the bay. The correlation analysis showed that sediment particle size, redox potential and organic matter content (especially phytoplankton autogenous organic matter) had great influence on phosphorus release potential of sediment.
【作者单位】：中国科学院南海海洋研究所中国科学院热带海洋生物资源与生态重点实验室;中国科学院大学;
【基金】：国家重点基础研究发展计划(973计划)项目(2015CB452901,2015CB452905) 国家自然科学基金项目(41406128) 中国科学院战略先导性专项(XDA11020205)
【分类号】：P736.41;X145

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