关键词：
饮用水;地下水;硝态氮;污染;氮肥;农田类型;辽宁省
摘 要：
对辽宁省水稻、玉米、蔬菜3类作物产区189个地下水饮用水井的硝态氮含量进行调查分析。结果表明,辽宁省平原农区饮用水硝态氮含量平均为4.63 mg/L,其中10.6%的饮用水井硝态氮含量超标(硝态氮含量≥10 mg/L),2.1%的饮用水井硝态氮含量严重超标(硝态氮含量≥20 mg/L),超过国家Ⅲ类饮用水质量标准。3种类型作物产区中,玉米产区饮用水硝态氮污染情况最轻,硝态氮平均含量为2.49 mg/L,超标率为4.2%,无严重超标率,87.5%采样点井水水质良好;蔬菜产区饮用水质量相对较差,硝态氮平均含量为4.48 mg/L,超标率和严重超标率分别为7.1%和1.8%,71.4%采样点井水水质良好;水稻产区饮用水硝态氮污染情况最为严重,20.8%采样水井硝态氮含量超标,3.8%水样严重超标。化学氮肥的施用对辽宁省不同作物产区饮用水中硝态氮含量有着直接且重要的影响,呈明显的正相关关系。由于氮肥施用量的增加,辽宁省水稻产区饮用水硝态氮污染呈恶化趋势,而蔬菜产区饮用水硝态氮含量在田间氮肥用量减少之后呈明显降低趋势,玉米产区饮用水硝态氮含量变化略有波动,但随着氮肥的增施已然出现了超标现象。
译 名：
Nitrate Contamination of Drinking-water in Three Types of Crop-producing Areas in Liaoning Province
作 者：
LIU Xiao-chen1,WANG Ren2,SUN Zhan-xiang2(1.Shenyang Agricultural University,Shenyang 110161,China;2.Liaoning Academy of Agricultural Sciences,Shenyang 110161,China)
关键词：
drinking water;groundwater;nitrate;contamination;nitrogenous fertilizer;type of farmland;Liaoning province
摘 要：
Nitrate content of 189 groundwater samples in drinking water wells on rice,corn,vegetables,three types of crop-producing areas of Liaoning province were taken investigation and analysis.The results showed that the mean value of NO-3-N content in drinking water was 4.63 mg/L in plain area of Liaoning,10.6 % of NO-3-N content in wells exceeded the MAC standard(nitrate content≥10 mg/L),and 2.1% of NO-3-N content seriously exceeded the drinking water quality standards that the National Class Ⅲ drinking water quality standards(nitrate content≥20 mg/L).Of the three types of crop-producing areas,the pollution status in corn-producing areas was the lightest,the average nitrate content was of 2.49 mg/L,the rate over MAC standard was 4.2%,and there is none of the wells in which nitrate content was above 20 mg/L,87.5% of the sampling of well water reflected good water quality;the quality of drinking water in vegetable-producing areas was relatively poor,the mean value of NO-3-N content was 4.48 mg/L,the rate over the standard of MAC and National Class Ⅲ drinking water quality were 7.1% and 1.8%,the good rate of sampling points was 71.4%;the nitrate polluted situation in drinking water of rice-producing areas was the most serious,for which 20.8% sampling wells nitrate content was over the MAC standard and 3.8% seriously exceeded the drinking water quality standards.The application of chemical nitrogen fertilizer had a direct and significant impact on the nitrate content in drinking water of different crop-producing areas in Liaoning province,between the two there were a significant positive correlation.Due to the increased use of nitrogen fertilizer,nitrate contamination of drinking water in Liaoning rice-producing areas showed a trend of deteriorating,at the same time,the nitrate content of drinking water in vegetable-producing areas reflected a decreasing trend after reducing the amount of nitrogen fertilizer in field.The nitrate content of corn-producing areas performed a slight fluctuations change,but with the increased use of nitrogen fertilizer,the pollution in drinking water had already occurred.
