沉积物─水界面营养盐释放研究Ⅰ.根际土壤溶液采样器在底泥氮释放研究中的应用  

NUTRIENT RELEASE AT SEDIMENT-WATER INTERFACE I. APPLICATION OF RHIZON-SMS IN STUDY OF NITROGEN RELEASE FROM SEDIMENTS

作　　者：宋静[1] 骆永明[1] 赵其国[1] 朱荫湄[2] 吴龙华[1] 吴胜春[1] 

机构地区：[1]中国科学院南京土壤研究所,南京2100085 [2]浙江大学环境工程系,杭州310029

出　　处：《土壤学报》2000年第4期515-520,共6页Acta Pedologica Sinica

基　　金：中国科学院院长特别基金;国家自然科学基金!(49831070);国家重点基础研究发展规划项目!(G1999011807);中

摘　　要：采用根际土壤溶液采样器（Ｒｈｉｚｏｎ－ＳＭＳ）和自制的培养容器对厌氧条件下西湖底泥ＮＨ４＋－Ｎ的释放进行了室内模拟研究。结果表明：在厌氧条件下，ＮＨ４＋－Ｎ的累计通量与时间关系曲线呈现３个阶段，根据通量一时间曲线中两个线性阶段计算的厌氧条件下ＮＨ４＋－Ｎ的释放速率分别为 １１．６０和 ５．１２ｍｇ ｍ－２ｄ－１。实验表明：Ｒｈｉｚｏｎ－ＳＭＳ具有使用方便、采样时空分辨率高等特点，可能成为间隙水地球化学研究的一种有力工具。Laboratory study on NH4+ -N release from the sediments of the West Lake in Hangzhou was conducted under anaerobic conditions using Rhizon-SMS (Rhizon Soil MoistUre Sampler) and homemade incubator. Three phases were observed in the cumulative NH4+ -N flux versus time curve and NH4+ -N release rates calculated from two linear parts of flux-time curve were 11.60 and 5.12 mg m-2d-1, respectively. Rhizon-SMS was found to be easy to operate and characterized by high spatial and temporal resolution. Therefore, it has the potential of serving as a powerful tool in pore water geochemistry studies.

关 键 词：底泥 根际土壤溶液采样器 营养盐释放 铵态氮 西湖 间隙水 地球化学 水体富营养化 

分 类 号：X524[环境科学与工程—环境工程] X142