海三棱藨草对崇明东滩沉积物磷素分布的影响  

EFFECT OF SCIRPUS MARIQUETER ON PHOSPHOROUS DISTRIBUTION IN EAST CHONGMING INTERTIDAL SEDIMENTS

作　　者：汪青[1] 刘敏[1] 侯立军[1] 欧冬妮[1] 刘巧梅[1] 余婕[1] 

机构地区：[1]华东师范大学地理系地理信息科学教育部重点实验室,上海200062

出　　处：《长江流域资源与环境》2005年第6期731-734,共4页Resources and Environment in the Yangtze Basin

基　　金：国家自然科学基金资助项目(40131020;49801018);教育部高等学校骨干教师资助计划项目;上海市重点学科资助项目(SHPAD-01)

摘　　要：以海三棱藨草为例,运用实验模拟的方法,通过根际、近根和远根沉积物的对比分析,运用根际微生物作用理论,研究了大型植物对潮滩沉积物磷分布及迁移转化的影响.实验结果表明,海三棱藨草通过根系对磷的吸收和自身有机质降解,在沉积物里形成了水平的和垂直的浓度梯度,干扰了磷的正常累积和迁移.通过吸收,海三棱藨草对崇明东滩沉积物中磷的净化速率为16.7～46.1 mg·cm -2·d -1.The effect of Scirpus mariqueter on phosphorous distribution in intertidal sediments was examined by measuring the phosphorous concentration in near-root, mean-root and far-root sediments at different depths in three cores, with application of the theory of rhizospherical microbe. The results of the examine indicated that Scirpus mariqueter disturbed the phosphorous distribution by drawing phosphate from sediments and microbial degradation which formed the horizontal and vertical concentrational grads. The purification rate of phosphorous by uptake of Scirpus mariqueter may be 16.7-46.1 mg · cm^-2 · d^-1.

关 键 词：磷 迁移 海三棱藨草 潮滩沉积物 净化速率 潮滩沉积物 崇明东滩 磷素 实验模拟 迁移转化 微生物作用 有机质降解 浓度梯度 磷分布 

分 类 号：X522[环境科学与工程—环境工程] Q959.726[生物学—动物学]