Effect of long-term phosphorus addition on the quantity and quality of dissolved organic carbon in a freshwater wetland of Northeast China
文献类型：期刊论文
| 作者 | R. Mao, S. Y. Li, X. H. Zhang, X. W. Wang and C. C. Song |
| 刊名 | Science of the Total Environment
 |
| 出版日期 | 2017 |
| 卷号 | 586页码:1032-1037 |
| 通讯作者 | 毛瑢 宋长春 |
| 中文摘要 | Understanding how P enrichment alters the quantity and quality of dissolved organic carbon (DOC) is important, because of their role in regulating the C cycle. Here, we established a four-level P addition experiment (0, 1.2,4.8, and 9.6 g Pm-2 year(-1)) in a N-limited freshwater wetland in the Sanjiang Plain, Northeast China. The aim of this study was to examine the effects of eight years of P addition on DOC concentration, SUVA(254) (Abs(254)/DOC concentration, indicating the aromaticity of DOC), C:C ratio (Abs(400)/DOC concentration, indicating the proportion of colored humic substances in DOC), and E4:E6 ratio (Abs(465)/Abs(665), indicating the molecular size of humic substances) in surface water and soil pore water (0-15 cm depth) during the growing season (June through September). Our results showed similar changing trends in concentration and optical properties of DOC following eight years of P addition in the both surface water and soil pore water across the sampling dates. Generally, P addition decreased DOC concentration, SUVA254, and C:C ratio, and increased E4:E6 ratio, irrespective of P addition levels. These altered optical properties of DOC indicated that P addition decreased the molecular weight and aromaticity of DOC, and thus increased the quality of DOC. These results suggest P enrichment substantially reduces the quantity of DOC in N-limited temperate freshwater wetlands, and imply that increased DOC quality following P addition can further provide a positive feedback to decreased DOC pool. (C) 2017 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.iga.ac.cn/handle/131322/7558]  |
| 专题 | 东北地理与农业生态研究所_湿地与全球变化学科组 |
| 推荐引用方式 GB/T 7714 | R. Mao, S. Y. Li, X. H. Zhang, X. W. Wang and C. C. Song. Effect of long-term phosphorus addition on the quantity and quality of dissolved organic carbon in a freshwater wetland of Northeast China[J]. Science of the Total Environment,2017,586:1032-1037. |
| APA | R. Mao, S. Y. Li, X. H. Zhang, X. W. Wang and C. C. Song.(2017).Effect of long-term phosphorus addition on the quantity and quality of dissolved organic carbon in a freshwater wetland of Northeast China.Science of the Total Environment,586,1032-1037. |
| MLA | R. Mao, S. Y. Li, X. H. Zhang, X. W. Wang and C. C. Song."Effect of long-term phosphorus addition on the quantity and quality of dissolved organic carbon in a freshwater wetland of Northeast China".Science of the Total Environment 586(2017):1032-1037. |
入库方式： OAI收割
来源：东北地理与农业生态研究所
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