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引用本文:包先明,陈开宁,范成新.沉水植物生长对沉积物间隙水中的氮磷分布及界面释放的影响.湖泊科学,2006,18(5):515-522. DOI:10.18307/2006.0513
BAO Xianming,CHEN Kaining,FAN Chengxin.Effects on nitrogen and phosphorus distribution in interstitial water and sediment-water nitrogen and phosphorus release with growing of submerged macrophytes. J. Lake Sci.2006,18(5):515-522. DOI:10.18307/2006.0513
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沉水植物生长对沉积物间隙水中的氮磷分布及界面释放的影响
包先明1,2, 陈开宁1, 范成新1
1.中国科学院南京地理与湖泊研究所, 南京210008;2.中国科学院研究生院, 北京100039
摘要:
采集未破坏沉积物结构的柱状沉积物样品,通过室内41 d的培养实验,研究了沉水植物生长过程对间隙水中NH4+-N和PO43--P的浓度的动态影响,分析了沉水植物生物量与沉积物中氮磷释放通量的对应关系.结果表明:随沉水植物生长和生物量增加,上部0-5 cm沉积物垂向各层间隙水中NH4+-N含量呈逐步降低,表现出沉积物-水界面氮的释放通量与沉水植物生物量存在负相关性;而间隙水PO43+-P含量则随沉水植物生长呈单峰型变化,磷释放通量与生物量相关性不明显.初步反映沉水植物在沉积物的生长过程中对氮磷吸收的生物地球化学机制是不同的.
关键词:  沉水植物生长  间隙水  氮和磷  释放  生物地球化学
DOI:10.18307/2006.0513
分类号:
基金项目:国家973计划(2002CB412307);国家高技术研究发展计划863项目(2002AA601013);中国科学院知识创新项目(KZCX3-SW-348、KZCX1-SW-12)联合资助
Effects on nitrogen and phosphorus distribution in interstitial water and sediment-water nitrogen and phosphorus release with growing of submerged macrophytes
BAO Xianming1,2, CHEN Kaining1, FAN Chengxin1
1.Nanjing Institule of Geography & limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China;2.Graduate School of Chinese Acdemy of Sciences, Beijing 100039, P. R. China
Abstract:
Effect with growing of submerged macrophytes on NH4+-N and PO43--P concentration in the interstitial water was studied by using undisturbed core samples in Lake Taihu,and analyzed the relationship between biomasses of submerged macrophytes and amount of nitrogen and phosphorus release. The results showed that concentration of NH4+-N from 0-5 cm in interstitial water was gradually reduced by the biomasses increase of submerged macrophytes,and amount of nitrogen release is distinctly negative correlated with biomasses of submerged macrophytes;The PO43--P concentration in interstitial water change was me peak tendency by the growing of submerged macrophytes,indicating that there was no distinct corlationships between amount of phosphorus release and biomasses of submerged macrophytes. There mingt exisf different biogeochemcal mechanism of the absorption of nitrogen and phosphorus by submerged macrophytes
Key words:  Submerged macrophytes  interstitial water  nitrogen and phosphorus  release  biogeochemistry
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