Nitrogen isotopic characteristics and source attribution of nitrate in different water bodies in the paddy rice system of the Taihu Lake region
文献类型：EI期刊论文
| 作者 | Zhang Xin-Yu |
| 发表日期 | 2014 |
| 关键词 | Nitrates Chlorine Groundwater Irrigation Lakes Nitrogen Rain River pollution Rivers Sewage |
| 英文摘要 | To discriminate among NO3--N sources in different water bodies in paddy rice system, 15N-NO3- abundance and chemical compositions (e.g., NO3-, NH4+, TP, Cl-, SO42-) were measured in water samples from pond, irrigation ditch, river, and ground water in rice system of the Taihu Lake region at three periods. It was found that nitrate was the dominant nitrogen species in most water samples. During the fertilizing period (June), the 15N-NO3- value of water samples were lower than those collected in other months, suggesting that the surface water and groundwater receive a significant contribution of NO3--N from agricultural fertilizer at this period. In periods prior to fertilization (April to May), the low 15N value in pond water was attributed to rainfall, and the high 15N value in ground water resulted mainly from denitrification. In periods after the fertilization (July to August), the high 15N value in pond water was caused by aquaculture wastewater, and the low 15N value in ground water indicated main nitrate source of agricultural leaching. The 15N values varied within a narrow range in river and irrigation water during all the three periods, but their nitrate source differed. Sewage and manure contributed nitrate to river water, while rainfall mainly control the nitrate of irrigation water. We put forward new intervals of Cl- and molar ratio of NO3-/Cl- to discriminate among NO3--N sources in Taihu Lake region. |
| 出处 | Zhongguo Huanjing Kexue/China Environmental Science
 |
| 卷 | 34期:2页:505-510 |
| 收录类别 | EI |
| 语种 | 英语 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/31208]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Zhang Xin-Yu. Nitrogen isotopic characteristics and source attribution of nitrate in different water bodies in the paddy rice system of the Taihu Lake region. 2014. |
入库方式： OAI收割
来源：地理科学与资源研究所
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