摘要
国内外大量研究表明,地下水硝酸盐污染已成为普遍问题。为了摸清山东省地下水硝酸盐污染状况,通过调查取样分析,对本省地下水硝酸盐含量状况及其影响因素进行了研究。结果表明,山东省地下水NO3--N含量总体较低,平均为7.4mg.L-1,仅有2%的地下水超过了我国地下水质量标准(GB/T14848—1993)。地区之间地下水硝酸盐含量有很大的差异,其中临沂市NO3--N含量最高,达10.6mg.L-1。受降雨影响,雨季后地下水硝酸盐含量下降。农田利用类型对地下水硝酸盐含量影响较大,在粮田、设施菜地、露天菜地、果园4种类型中,设施菜地影响最大,NO3--N达到13.1mg.L-1,其次为果园。随着埋藏深度的增加,NO3--N含量呈先升后降的趋势,最大平均值出现在埋深20~50m的地下水中,达8.5mg.L-1。
It was reported from many domestic and overseas studies that nitrate nitrogen(NO-3-N) pollution in groundwater had been a universal problem.As to evaluation the nitrate pollution status of groundwater in Shandong Province,a large-scale investigation and water-sampling analysis on NO-3-N concentration in local groundwater was performed,and the main influence factors of nitrate pollution were studied.The results showed that the average concentration of NO-3-N in groundwater was 7.4 mg·L-1 and only about 2% samples exceeded the criterion of national drinking water quality.In addition,the concentration of NO-3-N varied greatly due to different prefectural-level cities,with maximum concentration of 10.6 mg·L-1 occurred in Linyi City.The average concentration of NO-3-N in groundwater was affected by rainfall and a lower NO-3-N concentration in groundwater was observed after rainy season.The concentration of NO-3-N in groundwater was greatly affected by land using type,and the maximum NO-3-N average concentration of 13.1 mg·L-1 was observed in the protected vegetable land area and the second was in orchard.The concentration of NO-3-N in groundwater was also affected by water-sampling depth,and the maximum NO-3-N average concentration of 8.5 mg·L-1 was observed in the water aquifer lies between 20 m and 50 m depth.There was a variation trend that NO-3-N concentration raised firstly and then declined as water-sampling depth increase.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2011年第2期353-357,共5页
Journal of Agro-Environment Science
基金
国家水体污染控制与治理科技重大专项(2008ZX07425-001)
农业部科教司农业生态环境保护项目(华北地区大中城市郊区地下水硝酸盐含量调查与评价)
公益性行业(农业)科研专项经费项目"环渤海区域农业碳氮平衡定量评价及调控技术研究"(200803036)
山东省农业科学院高技术自主创新基金项目(2007YCX023-01)
关键词
山东省
地下水
硝酸盐
影响因素
农田利用类型
地下水埋深
Shandong Province
groundwater
NO-3-N
influence factor
land using type
depth of groundwater