不同养分管理对东北东部半山区地下饮用水硝态氮的影响

摘要

In order to discuss effects of different nutrient managements on rural ground drinking water of eastern half mountainous region of northeast china, field experiment was carried out in 2009 and 2010 in Qingyuan city, Liaoning province. The results indicated that, the nitrogen fertilizer amount of conventional nutrient management(CNM), farmland nutrient management(FNM) were 240, 192 kg/hm2 respectively. Comparing with CNM, FNM was decreased by 20% of nitrogen fertilizer amount. Nitrogen agronomy productivity in FNM was significantly improved 22.47%. Groundwater nitrate nitrogen concentration of shallow groundwater area was 1.6 times than that of deep groundwater area. Applied FNM to the demonstration area, groundwater nitrate nitrogen concentration in FNM of the demonstration area with CNM was greatly decreased by 51.19%. Consequently, it was very important to protect rural groundwater source area that FNM reduced the risk of farmland fertilization polluting groundwater.%为了探讨不同养分管理方式对东北东部半山区村镇地下饮用水水质的影响,该文在辽宁省清原满族自治县选择典型地下饮用水源区域,通过近2a的田间试验,研究结果表明:常规养分管理和农田养分管理施氮量分别为240 kg/hm2和192 kg/hm2,与常规养分管理相比,农田养分管理处理氮肥农学生产力显著高于常规养分管理处理,提高了22.47％；浅地下水埋深区,地下水硝态氮质量浓度增幅为深地下水埋深区1.6倍；减N 20％农田养分管理措施实施后,区域地下水硝态氮质量浓度较常规养分管理措施削减了51.19％.因此,采取农田养分管理措施降低了农田施肥对浅层地下饮用水源地污染风险,这对于村镇地下饮用水水源地的保护及村镇居民安全饮水具有重要意义.