›› 2014, Vol. 26 ›› Issue (2): 0-410414.

• 环境科学 •    

2010—2012年辽宁省蔬菜主产区地下水硝酸盐含量调查

宫亮,隽英华,孙文涛*   

  1. 辽宁省农业科学院 植物营养与环境资源研究所,辽宁 沈阳 110161
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2014-03-25 发布日期:2014-07-09

Investigation into nitrate pollution of groundwater in main vegetable production areas of Liaoning Province

GONG Liang;JUAN Yinghua;SUN Wentao*   

  1. Institute of Plant Nutrition and Environmental Resources, Liaoning Academy of Agricultural Sciences, Shenyang 110161, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2014-03-25 Published:2014-07-09

摘要: 为调查辽宁省蔬菜主产区地下水硝酸盐污染现状,于2010—2012年连续3年,分别在每年7月份(雨季)和10月份(雨季后)从辽宁省蔬菜主产区112眼水井采集地下水样品,并利用紫外分光光度法测定其硝酸盐含量。结果表明,所调查的水井中,29%的水井NO-3N含量超标,39%的水井有潜在污染风险;地下水NO-3N含量与水井深度呈显著负相关,井深<10 m、10~20 m和≥20 m的地下水NO-3N含量分别为2623,1761和681 mg·L-1;雨季(7月份)NO-3N含量超标频数高于非雨季(10月份);硝酸盐含量与施氮量呈线性相关,当纯氮年投入量超过3229 kg·hm-2时,易造成地下水NO-3N含量超标。

关键词: 地下水, 硝酸盐, 氮肥, 蔬菜

Abstract: In order to survey the nitrate pollution status of groundwater in main vegetable production areas of Liaoning Province, water samples were collected from 112 wells in July (rainy season) and October (after rainy season) from 2010 to 2012, and the nitrate contents of samples were determined by ultraviolet visible absorption spectrophotometry (TU1810 DASPC).The results showed that nitrate content in 29% of samples was beyond the national standard, and 39% of samples exhibited potential environmental risk. Based on well depth, it was shown that the nitrate contents were 2623, 1761 and 681 mg·L-1 for groundwater with depth< 10 m, 10~20 m and ≥ 20 m, respectively, and there was a negative correlation between nitrate content and well depth. The nitrate pollution status was more severe in July than that in October. In addition, a linear correlation was observed between nitrate content of samples and nitrogen input from fertilization. According to the national water quality standard, the annual input of total nitrate should not exceed 3229 kg·hm-2.

Key words: groundwater, nitrate, nitrogen fertilizer, vegetable