Nitrate distribution and denitrification in the saturated zone of paddy field under rice/wheat rotation
文献类型：期刊论文
| 作者 | Zhu, JG; Liu, G; Han, Y; Zhang, YL; Xing, GX |
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2003-02-01 |
| 卷号 | 50期号:6页码:725-732 |
| 关键词 | nitrate denitrification paddy soil saturated zone |
| ISSN号 | 0045-6535 |
| 通讯作者 | Zhu, JG(jgzhu@issas.ac.cn) |
| 英文摘要 | Nitrate concentration in well water collected from the wells near farm houses was investigated in the Taihu Lake basin (TBL) of China. Nitrate-N content of the well water ranged from 0.1 to 23 mgN1(-1), and 41% exceeded the criteria (10 mg N1(-1)). It was found that the difference in well conditions, especially the depth of the well, was the main cause of the difference in the nitrate concentration of well water, i.e. it was higher in shallow well and lower in deeper well. A recommendation was made for local farmers to drill wells deeper than 10 m in order to reduce the risk of high ingestion of nitrate-N in their drinking water. Nitrate distribution and denitrification in the saturated zone of a paddy field under rice/wheat rotation in the TBL were studied. Porous pipes were installed in triplicate at depths of 1.5, 2.0, 2.5, 3.5 and 5 m respectively to collect the soil solution samples. Results showed that nitrate was the predominant N form in soil solution of saturated zone, and it increased from 1.5 to 2.5 m depth, and decreased from 2.5 to 5 m depth. N(2)O captured in the soil solution was very high comparing with N(2)O content in air. N(2)O content was positively correlated with nitrate concentrations in the soil profile. These results indicate that nitrate leached into saturated zone was mainly transformed via denitrification processes. Comparing the sum of inorganic nitrogen with the total nitrogen in soil solution samples collected from those wells at the field, some soluble organic nitrogen was found about 1-2 mgN1(-1) in average. (C) 2002 Elsevier Science Ltd. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | GROUNDWATER ; NITROGEN ; AQUIFER ; SOIL |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000180082200009 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2559246 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Zhu, JG |
| 作者单位 | Acad Sinica, Inst Soil Sci, Lab Mat Cycling Pedosphere, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, JG,Liu, G,Han, Y,et al. Nitrate distribution and denitrification in the saturated zone of paddy field under rice/wheat rotation[J]. CHEMOSPHERE,2003,50(6):725-732. |
| APA | Zhu, JG,Liu, G,Han, Y,Zhang, YL,&Xing, GX.(2003).Nitrate distribution and denitrification in the saturated zone of paddy field under rice/wheat rotation.CHEMOSPHERE,50(6),725-732. |
| MLA | Zhu, JG,et al."Nitrate distribution and denitrification in the saturated zone of paddy field under rice/wheat rotation".CHEMOSPHERE 50.6(2003):725-732. |
入库方式： iSwitch采集
来源：南京土壤研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。