| 摘要: |
| 利用分级提取法对鄱阳湖沉积物进行了磷形态的分级提取和测定, 系统研究了沉积物中磷的赋存形态及分布特征.结果表明, 鄱阳湖表层沉积物中磷的赋存形态主要包括铁磷(Fe-P)、钙磷(Ca-P)、铝磷(Al-P)、可溶性磷(DP)等无机磷(IP)及有机磷(OP), 各形态磷的空间分布基本具有从河口地区监测点向湖区监测点方向升高的趋势, 垂向分布上总磷及各形态磷含量随深度增加而降低.表层沉积物(0-2cm)中总磷含量为578.36-813.55mg/kg, 主要由无机磷组成, 无机磷中以Fe-P含量最高, 最大值达350.24mg/kg, 占总磷的40%以上, Ca-P、Al-P含量相当, 约占总磷含量的20%左右, 而以DP的含量最低, 含量在5%以下.有机磷含量约占总磷含量的15%左右.另外, 沉积物中TP含量与Fe-P、Al-P、Ca-P及OP均具有较好的相关性, 且OP含量与Fe-P、Al-P也具有较好的正相关关系, 而与Ca-P的相关性较弱. |
| 关键词: 沉积物 磷 赋存形态 分布特征 鄱阳湖 |
| DOI：10.18307/2010.0504 |
| 分类号: |
| 基金项目:国际科技合作项目(2006DFB91920);国家自然科学基金项目(40672159)联合资助 |
|
| Phosphorus existing forms and distribution characteristic in Lake Poyang sediments |
|
XIANG Sulin1,2, ZHOU Wenbin1
|
|
1.Key Laboratory of Lake Poyang Ecology and Bioresource Utilization of MOE, Nanchang University, Nanchang 330047, P. R. China;2.Department of Environment Engineering, East China Jiaotong University, Nanchang 330013, P. R. China
|
| Abstract: |
| Forms and distribution characteristics of phosphorus in Lake Poyang sediments were studied systematically using the classification extraction methods for extracting various forms of phosphorus. The results showed that phosphorus in surface sediments mainly consisted of inorganic phosphorous species, involving Fe-P, Ca-P, Al-P, DP and organic phosphorous species. The spatial distribution of phosphorus species in surface sediments had depressed trend from the orientation of Lake Poyang to the direction of river into entrance of lake (Longkou, Kangshan), and the content of total phosphorus and phosphorus types in the sediment were obviously decreased with depth. The content of TP of surface sediment (0-2cm) range from 578.36 to 813.55mg/kg, and IP was the major phosphorus species in the sediment. Fe-P was the dominant form of IP, which accounted for greater than 40%, Ca-P, Al-P for 20% respectively, and DP for less 5%. The content of OP was lower which accounted for 15%. TP was positively correlated to Fe-P, Al-P, Ca-P and OP, and OP was positively correlated to Fe-P and Al-P, but only weakly related to Ca-P. |
| Key words: Sediment phosphorus existing forms distribution characteristic Lake Poyang |
