【作者】 李鹏； 赵同科； 张成军； 刘宝存； 赵丽平；

【Author】 LI Peng, ZHAO Tong-ke * , ZHANG Cheng-jun, LIU Bao-cun, ZHAO Li-ping (Institute of Plant Nutrition and Natural Resources, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China)

【机构】 北京市农林科学院植物营养与资源研究所；

【摘要】 为考察大兴集约化农区地下水硝酸盐含量变化规律,探讨地下水硝酸盐控制对策,于2005年至2012年对该区进行15次地下水采样分析,结果表明该区地下水硝酸盐(以氮计)多年平均值为1.47mg·L-1,符合国家地下水质量标准中的Ⅰ类水质标准要求,但该区地下水受硝酸盐影响的区域不均性增强;多次监测期粮田和菜地地下水硝酸盐平均含量显著高于果园地下水硝酸盐平均含量,略高于其他土地利用类型地下水硝酸盐平均含量;蔬菜、果园地下水硝酸盐平均含量与各监测时期研究区总体地下水硝酸盐平均含量间存在极显著线性正相关关系。在农业活动频繁的种植区合理使用农业投入品,开展有效的水分管理措施,制定相应污染防治法规,加强科普宣传,提高公众环保意识,均是降低该区地下水硝酸盐污染风险的有效对策。更多还原

【Abstract】 The analysis of groundwater samples sampled 15 times from 2005 to 2012 in intensive agricultural region of Daxing district in Beijing was conducted in this study, in order to investigate the dynamic change of nitrate nitrogen in groundwater of intensive agricultural region in this district and explore control countermeasures of nitrate nitrogen in groundwater. The results indicate that the mean value of nitrate nitrogen in groundwater of this area is 1.47 mg·L -1 , which has reached the first degree of the national groundwater quality standard, but regional nonuniformity of nitrate nitrogen concentration in groundwater tends to increase. The average concentration of nitrate nitrogen in groundwater from grainfield and vegetable land are significantly higher compared with that from orchard while are slightly higher than that from the other kind of field. The mean values of nitrate nitrogen in groundwater from vegetable field and orchard have a highly significant positive linear correlation with that from whole area during every monitoring period. Effective countermeasures to reduce the risk of nitrate pollution in groundwater in Daxing district should be taken including using agricultural inputs rationally in planting area of frequent agricultural activities, carrying out effective water management measures, formulating corresponding laws and rules of nitrate pollution of groundwater and its control, reinforcing the popularization and propagating in sciences, and improving the environmental consciousness of the public.更多还原