| 太湖及其主要入湖河流沉积磷形态分布研究 |
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| 引用本文： | 张路,范成新,池俏俏,王建军,秦伯强.太湖及其主要入湖河流沉积磷形态分布研究[J].地球化学,2004,33(4):423-432. |
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| 作者姓名： | 张路 范成新 池俏俏 王建军 秦伯强 |
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| 作者单位： | 1. 中国科学院,南京地理与湖泊研究所,江苏,南京,210008;中国科学院,研究生院,北京,100039
2. 中国科学院,南京地理与湖泊研究所,江苏,南京,210008 |
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| 基金项目： | 中国科学院知识创新工程项目，国家高技术研究发展计划(863计划)，国家自然科学基金 |
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| 摘 要： | 选择了我国第三大浅水湖泊--太湖及其主要入湖河流进行沉积磷形态的连续提取研究.太湖湖区沉积磷中不稳态磷(LP)及铝结合态磷(Al-P)含量很低,其余形态磷为铁结合态磷(Fe-P)＜钙结合态磷(Ca-P)＜有机磷(Org-P).河流沉积物中有机磷的相对含量高于湖泊沉积物,绝对含量平均值约为湖泊沉积物的3.9倍,铁结合态磷的绝对含量约为湖泊沉积物的3/4,湖区沉积物Fe-P含量与水体中PO3-4-、Chla呈显著正相关关系,同时与间隙水的氧化性呈显著负相关关系.太湖各湖区沉积物的磷形态表现为空间差异较大,活性组分的差异性要大于活性较差的组分.总的来说北部湖区沉积物中Fe-P和Org-P含量高于其他湖区,这与太湖北部湖区水体高营养级和藻类爆发关系密切.湖区沉积磷的垂直分布规律较复杂,既有随深度增加的,也有随深度降低的,河流沉积物同样如此.这与太湖及河流生态条件、污染物排放以及沉积动力学条件不同有关.
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| 关 键 词： | 沉积物 磷 形态分布 入湖河流 太湖 |
| 文章编号： | 0379-1726(2004)04-0423-10 |
| 修稿时间： | 2003年9月8日 |
Phosphorus species distribution of sediments in Lake Taihu and its main inflow rivers |
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| ZHANG Lu,FAN Cheng-xin,CHI Qiao-qiao,WANG Jian-jun,Qin Bo-qiang.Phosphorus species distribution of sediments in Lake Taihu and its main inflow rivers[J].Geochimica,2004,33(4):423-432. |
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| Authors: | ZHANG Lu FAN Cheng-xin CHI Qiao-qiao WANG Jian-jun Qin Bo-qiang |
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| Institution: | ZHANG Lu1,2,FAN Cheng-xin1,CHI Qiao-qiao1,2,WANG Jian-jun1,2,Qin Bo-qiang1 |
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| Abstract: | Phosphorus species distribution of sediments in Lake Taihu and its main inflow rivers was analyzed with sequential extraction method. The labile ph osphorus (LP) and aluminum bound phosphorus (Al-P) are in very low contents an d the contents of the rest species are iron-bound phosphorus (Fe-P) < CaCO3-bound phosphorus (Ca-P) < refractory organic phosphorus (Org-P). The rela tive content of Org-P in sediments in main inflow rivers is higher than that i n Lake Taihu and with 2.9 times higher than that in lake sediments in absolute c ontent. The Fe-P content in river sediment is three forth of that in lake sedi ments, and the Fe-P content of the Lake sediments is remarkably positive corre lated with the concentration of that and Chla and remarkably negative correlated with the oxidability of the pore water. Great space diversity of phosphorus fra ctions of sediment in Lake Taihu is observed. While the discrepancy of active sp ecies is greater than the inert ones. In general, the Fe-P and Org-P content s in the sediments of the north area of Lake Taihu were higher than those in oth er areas, which was highly correlated with the higher phosphorus loading and alg ae blooming of the north area of Lake Taihu. The vertical distribution of the ph osphorus species was a little complicated with both increased and decreased tren ds along with the depth. This phenomenon occurred in both Lake Taihu and its mai n inflow rivers. This is related with the difference of ecosystem condition, pol lutant discharge and sedimental dynamic condition in Lake Taihu and its inflow r ivers. |
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| Keywords: | sediment phosphorus species distribution inflow rivers Lake Taihu |
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