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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
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[J].湖泊科学,2006,18(5):515-522.
作者姓名:包先明  陈开宁  范成新
作者单位:1. 中国科学院南京地理与湖泊研究所,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,南京,210008
基金项目:国家重点基础研究发展计划(973计划);国家高技术研究发展计划(863计划);中国科学院知识创新工程项目
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NH_4~ -N和PO_4~(3-)-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NH_4~ -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PO_4~(3 )-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
收稿时间:2005-08-01
修稿时间:2005-11-11

Effects on nitrogen and phosphorus distribution in interstitial water and sediment-water nitrogen and phosphorus release with growing of submerged macrophytes
BAO Xianming,CHEN Kaining and FAN Chengxin.Effects on nitrogen and phosphorus distribution in interstitial water and sediment-water nitrogen and phosphorus release with growing of submerged macrophytes[J].Journal of Lake Science,2006,18(5):515-522.
Authors:BAO Xianming  CHEN Kaining and FAN Chengxin
Institution:Nanjing Institule of Geography & limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China;Graduate School of Chinese Acdemy of Sciences, Beijing 100039, P. R. China,Nanjing Institule of Geography & limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China and Nanjing Institule of Geography & limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China
Abstract:Effect with growing of submerged maerophytes on NH_4~ -N and PO_4~(3-)-P concentration in the interstitial water was studied by using undisturbed core samples in Lake Talhu,and analyzed the relationship between biomas- ses of submerged macrophytes and amount of nitrogen and phosphorus release.The results showed that concentration of NH_4~ -N from 0-5 cm in interstitial water was gradually reduced by the biomasses increase of submerged macro- phytes,and amount of nitrogen release is distinctly negative correlated with biomasses of submerged macrophytes; The PO_4~(3-) -P concentration in interstitial water change was me peak tendency by the growing of submerged macro- phytes,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.
Keywords:Submerged macrophytes  interstitial water  nitrogen and phosphorus  release  biogeochemistry
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