| 鄱阳湖三江口柱状沉积物氮的垂直分布特征(英文) |
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| 引用本文： | 王毛兰,艾永平,周文斌.鄱阳湖三江口柱状沉积物氮的垂直分布特征(英文)[J].农业科学与技术,2010,11(2). |
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| 作者姓名： | 王毛兰 艾永平 周文斌 |
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| 作者单位： | 南昌大学鄱阳湖环境与资源利用教育部重点实验室,江西南昌,330029;南昌大学环境与化学工程学院,江西南昌,330031 |
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| 基金项目： | 江西省教育厅科技项目，国际科技合作项目，国家重大水专项 |
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| 摘 要： | 用重力型柱状采样器分别在赣江南支入湖口、抚河入湖口、信江西支入湖口和3条河流汇合后的湖区进行柱状沉积物采集。每个采样点沉积物柱芯20～30cm,在现场根据沉积物沉积特点按1～5cm间隔分截,分截好的沉积物样品用聚乙烯袋分装密封,带回实验室于-20℃冷冻保存。沉积物有机质(TOM)的测定参照《土壤农化分析》中方法进行。取风干样品用KCl浸提,纳氏试剂比色法测定上清液NH4+-N的含量;CaSO4浸提,紫外分光光度法测定上清液NO3-N的含量;取风干泥样研磨至200目,用德国元素分析系统公司VARIOMACROCNS元素分析仪测定其总氮(TN)含量,研究鄱阳湖三江口柱状沉积物中各形态氮的垂直剖面分布规律结果表明,柱状沉积物中TN随深度变化范围为480.0～1900.0μg/g,其含量随深度变化表现为3种分布类型:随深度逐渐减小型、随深度逐渐增加型和两端含量低中间高型。NH4+-N含量变化范围为8.7～37.1μg/g,NH4+-N在沉积物中的含量随深度增加呈总体增加趋势;NO3-N含量较低,其变化范围为0～15μg/g,随深度变化其含量变化不明显。其中,NH4+-N与TOM呈极显著正相关关系,NH4+-N与NO3-N以及TN与TOM呈显著正相关关系。
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| 关 键 词： | 鄱阳湖三江口 柱状沉积物 氮 分布特征 |
Vertical Distribution Characteristic of Nitrogen in the Core Sediments of Three Rivers Estuary in Poyang Lake |
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| WANG Mao-lan,AI Yong-ping,ZHOU Wen-bin.Vertical Distribution Characteristic of Nitrogen in the Core Sediments of Three Rivers Estuary in Poyang Lake[J].Agricultural Science ＆ Technology,2010,11(2). |
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| Authors: | WANG Mao-lan AI Yong-ping ZHOU Wen-bin |
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| Institution: | 1; 2 1.Key Laboratory of Poyang Lake Environment and Resource Utilization of Ministry of Education; Nanchang University; Nanchang 330029; 2.School of Environmental & Chemical Engineering; Nanchang 330031; |
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| Abstract: | The vertical profile distribution characteristics of nitrogen in core sediments of Three Rivers Estuary in Poyang Lake were studied.The results showed that TN content in core sediments ranged from 480.0 to 1 900.0 μg/g with the change of depth,which was divided into three distribution types as follows:TN content decreases gradually with the increase of depth,TN content increases gradually with the increase of depth or higher content in the middle but lower content in two ends.NH4+-N content ranged from 8.7 ... |
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| Keywords: | Three Rivers Estuary of Poyang Lake Core sediment Nitrogen Distribution characteristic |
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