| 湖泊底泥氮营养释放特征研究 |
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| 作者姓名： | 徐晓锋 杨浩 吕俊杰 |
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| 作者单位： | 河南科技大学农学院，中国科学院南京土壤研究所 南京210008，南京师范大学，中国科学院南京土壤研究所，洛阳471003，南京210008，南京210008 |
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| 基金项目： | 中国科学院重点实验室基金;河南科技大学校科研和教改项目 |
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| 摘 要： | 通过模拟培养,研究了底泥氮营养的释放及上覆水体中氮营养的浓度变化特征。结果表明,在扰动下,底泥向上覆水体明显地释放氮营养,而消亡的水华更可以激发底泥中有机氮的释放,底泥中有机氮的矿化释放与沉积到底泥表层的水华量密切相关。释放进入上覆水体中氮首先以铵氮存在,并快速向亚硝氮转化,此后才向硝氮转化。水中铵氮浓度高,存在时间长,是比较主要的氮形态。
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| 关 键 词： | 底泥 有机N矿化 富营养化 |
Nitrogen Release Characteristic of Dianchi Lake Sediment |
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| Authors: | Xu Xiaofeng Yang Hao Lv Junjie |
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| Institution: | 1Henan University of Science and Technology, Luoyang 471003; 2Institute of Soil Science, the Chinese Academy of Sciences, Nanjing 210008; 3Nanjing Normal University, Nanjing 210008 |
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| Abstract: | Nitrogen release characteristic of Dianchi lake sediment and the nitrogen nutrients concentration of overlying water body was studied through simulating cultivation.The results indicated that under disturbed sediment released N nutrients to overlying water body markedly.The dead cells of phytoplankton could promote organic nitrogen of sediment mineralization.The amount of nitrogen nutrients released of sediment was correlation with the amount of dead cells of phytoplankton being deposited.Ammonia was the main form of the nitrogen nutrient being released into overlying water body,and it was transformed to nitrite soon.And then nitrite was transformed to nitrate. |
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| Keywords: | Sediment Organic nitrogen mineralization Eutrophication |
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