| 摘要: |
| 针对平原河网地区典型农田系统灌溉施肥带来的地下水环境污染问题，采集南通地区蔬菜地、水稻-小麦轮作地、水稻-油菜轮作地和桑地地下水样品，分析了不同农田种植体系下的地下水污染程度。结果表明，蔬菜、桑地、水稻-油菜轮作、水稻-小麦轮作地地下水的硝态氮（N）平均值分别为12.2，9.53，7.95和6.12 mg/L，与氮肥用量呈显著的正相关关系；研究区域地下水硝态氮超III类标准率（＞20 mg/L）的为4.8%，表明地下水已部分受到硝态氮污染。 |
| 关键词: 平原河网地区 农田 地下水 硝态氮 南通 |
| DOI： |
| 分类号:X523 |
| 文献标识码:B |
| 基金项目:江苏省环境监测科研基金资助项目（1310） |
|
| Investigation on Nitrate Pollution of Groundwater in Typical Farmlands of Nantong Plain River Networks |
|
DAI Xuanyu，XU Ailan，YAO Ying
|
|
Nantong Environmental monitoring center, Nantong, Jiangsu 226006，China
|
| Abstract: |
| In order to solve the problem of environmental pollution with fertilization and irrigation to typical farmlands in Nantong plain river networks, this article took vegetable, mulberry, rice wheat rotation, rice rape rotation corresponding groundwater samples in Nantong, analyzed the NO3-N accumulation of different farm utilization and its effects on groundwater. The results showed that, the content of NO3-N in vegetable, mulberry, rice rape rotation, rice wheat rotation corresponding groundwater were 12.2, 9.53, 7.95, 6.12mg/L, the concentration had a positive correlation with nitrogen fertilizer consomption. There were 4.8% of samples exceeding the maximum permissible limit for groundwater (20 mg/L), which indicated that the groundwater of investigative zone was partially polluted by NO3-N. |
| Key words: Plain river networks Farmland Groundwater NO3-N Nantong |
