新野县典型菜田施肥对地下水质的影响

Effect of Fertilization on Groundwater Quality of Typical Vegetable Fields in Xinye County

蔬菜是新野县三大支柱产业之一。为摸清新野县蔬菜化肥使用及地下水水质情况,2018年开展了针对性调查。结果表明,新野县蔬菜折纯施肥量为纯N 403.11 kg/hm^2、P2O5368.06 kg/hm^2、K2O 365.64 kg/hm^2。定点调查蔬菜集中产区地下水水质状况,硝态氮含量13.56 mg/L,铵态氮含量0.09 mg/L,介于Ⅱ类到Ⅲ类之间,总体Ⅲ类超标率21.43%。菜田施肥量及地下水质普遍高于大田作物,应引起足够重视,为下一步开展化肥残留治理工作提供参考。

The vegetables are one of the three pillar industries in Xinye County.In order to find out the use of vegetable fertilizer and groundwater quality in Xinxinye County,a targeted investigation was carried out in 2018.The results showed that the amount of pure fertilization of vegetables in Xinxinye County was N 403.11 kg/hm^2,P2O5368.06 kg/hm^2,K2O 365.64 kg/hm^2.According to the investigation of groundwater quality in the vegetable producing areas,the content of nitrate nitrogen was 13.56 mg/L,the content of ammonium nitrogen was 0.09 mg/L,which was between classⅡand classⅢ,and the overall exceeding rate of classⅢwas 21.43%.The amount of fertilizer application and groundwater quality in vegetable field were generally higher than that in field crops,which should be paid more attention to and could provide reference for the next step of fertilizer residue treatment.