乌梁素海和岱海的水-沉积物系统中有机磷分布特征  

Distribution Characters of Organic Phosphorus in the Overlying Water-Sediment System of the Wuliangsuhai and Daihai in the Inner Mongolia Plateau, China

作　　者：吕昌伟[1] 何江[1] 毛海芳[1] 梁英[1] 

机构地区：[1]内蒙古大学环境与资源学院,呼和浩特010021

出　　处：《农业环境科学学报》2010年第3期541-545,共5页Journal of Agro-Environment Science

基　　金：国家自然科学基金项目(40863003);内蒙古自然科学基金项目(2009BS0601);内蒙古大学高层次引进人才科研启动基金项目(Z20080209)

摘　　要：以乌梁素海和岱海2个不同类型湖泊为研究对象,系统探讨了2个湖泊上覆水和沉积物中有机磷(Or-P)的地球化学特征。结果表明,乌梁素海和岱海上覆水中溶解性有机磷(DOP)的含量范围分别为0.02～0.12mg·L-1和0.01～0.03mg·L-1,2个湖泊上覆水中DOP均占TDP的60%以上,是上覆水中TDP的重要组成部分和主要存在形态;乌梁素海和岱海沉积物中有机磷(Or-P)的平均含量分别为19.25～69.40mg·kg-1和168.21～178.41mg·kg-1;2个湖泊上覆水中DOP含量明显高于英格兰Tamar河口区,2个湖泊沉积物中Or-P的含量低于长江中下游浅水湖泊。据估算,乌梁素海和岱海上覆水中的DOP库分别达到12t和10t;这2个湖泊沉积物中Or-P的差异性反映了湖泊环境及生态类型对Or-P生物有效性的重要影响,揭示有机磷库是不容忽视的潜在生物有效磷源。In this work, the concentrations and distribution characters of organic phosphorus（Or-P）in the overlying water-sediments systems of the Wuliangsuhai and Daihai were discussed. The concentration ranges of dissolved organic phosphorus（DOP）in the overlying water from the Wuliangsuhai and Daihai were 0.02～0.12 mg·L-1 and 0.01～0.03 mg·L-1 respectively, which were higher than those in the waters of the Tamar estuary（SW England）; the DOP concentrations account for not less than 60% of the total dissolved phosphorus（TDP）indicating that DOP was the dominant species of the TDP. The average concentration ranges of Or-P in the sediments from the Wuliangsuhai and Daihai were 19.25～69.40 mg·kg^-1 and 168.21～178.41 mg·kg^-1 respectively, which were lower than those in the sediments from shallow lakes in middle and lower reaches of the Yangtze River Area in China. On the basis of estimate, the DOP pools in the overlying water of the Wuliangsuhai and Daihai were of 12 t and 10 t respectively. The differences of Or-P revealed the differences of the environments and ecology types between the two lakes and the importance of the potential bioavailability of Or-P.

关 键 词：有机磷 分布特征 上覆水 沉积物 湖泊 

分 类 号：X524[环境科学与工程—环境工程]