长江口及其邻近海域沉积物磷的赋存形态和空间分布
发布时间：2019-06-19 00:53
【摘要】：采用SMT磷分级法研究长江口及其邻近海域沉积物中磷的赋存形态及分布特征,并探讨了其影响因子.研究结果表明,沉积物中总磷(TP)含量为476.91~980.04μg·g~(-1),有机磷(OP)含量为15.84~139.21μg·g~(-1);而无机磷(IP)为主要赋存形态,其含量为421.67~844.86μg·g~(-1),约占TP 72.9%~96.7%.IP中以钙结合态磷(HCl-P)为主,其含量为186.88~431.69μg·g~(-1),占IP的42.3%~57.79%;而铁/锰结合态磷(Na OH-P)的含量最少,其含量为4.17~52.76μg·g~(-1),仅占IP的2.0%~3.3%.空间分布上,不同形态磷含量具有明显的时空变化特征.夏季TP和IP的含量由咸水端到淡水端呈现出先降低后升高,冬季则先升高后降低的趋势.OP的含量在夏季时无明显分布规律,而在冬季时表现出由咸水端到淡水端降低的趋势.Na OH-P含量在冬夏季均表现为淡水端处较高;HCl-P含量在夏季无明显的变化规律,而冬季时近淡水端处较高.沉积物粒径大小影响磷的赋存形态,表现为夏季粘粒对OP影响较大;冬季粘粒和粉粒与IP存在着负相关性,与OP存在着显著的正相关性.此外,沉积物总有机碳、盐度和碱性磷酸酶活性也是影响磷赋存形态的主要因子.
[Abstract]:The occurrence form and distribution characteristics of phosphorus in sediments of Changjiang Estuary and its adjacent waters were studied by SMT phosphorus classification method, and its influencing factors were discussed. The results show that the contents of total phosphorus (TP) and organophosphorus (OP) in sediments are 476.91 ~ 980.04 渭 g 路g ~ (- 1) and 15.84 ~ 139.21 渭 g 路g ~ (- 1), respectively. Inorganic phosphorus (IP) is the main occurrence form, its content is 421.67 ~ 844.86 渭 g 路g ~ (- 1), which is mainly calcium bound phosphorus (HCl-P) in TP 72.9%~96.7%.IP, and its content is 186.88 ~ 431.69 渭 g 路g ~ (- 1), accounting for 42.3% 鈮，
本文编号：2501932
[Abstract]:The occurrence form and distribution characteristics of phosphorus in sediments of Changjiang Estuary and its adjacent waters were studied by SMT phosphorus classification method, and its influencing factors were discussed. The results show that the contents of total phosphorus (TP) and organophosphorus (OP) in sediments are 476.91 ~ 980.04 渭 g 路g ~ (- 1) and 15.84 ~ 139.21 渭 g 路g ~ (- 1), respectively. Inorganic phosphorus (IP) is the main occurrence form, its content is 421.67 ~ 844.86 渭 g 路g ~ (- 1), which is mainly calcium bound phosphorus (HCl-P) in TP 72.9%~96.7%.IP, and its content is 186.88 ~ 431.69 渭 g 路g ~ (- 1), accounting for 42.3% 鈮，
本文编号：2501932
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