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- W2386609828 abstract "To investigate the spatial distribution of groundwater nitrate nitrogen(NO-3-N) in the Chao Lake watershed,253 water samples were collected from wells in the watershed from November to December,2009 and their NO-3-N concentrations were analyzed.The results showed that the samples' NO-3-N concentrations were averaged 7.13 mg/L,and 15.81% of them exceeded 10 mg/L,the WHO limit for NO-3-N of drinking water,and 7.11% of them exceeded 20 mg/L,the criterion for serious NO-3-N pollution.The NO-3-N concentrations were different in different land types,with the pattern of villagesvegetable fieldsfruit gardensdry landstownsrice-rape(or wheat) fieldssingle-season rice fieldslivestock farms.The NO-3-N concentration of groundwater in Green Rice-Producing Area was lower than that in Non-Green Rice-Producing Area in Chao Lake watershed.The NO-3-N concentration of groundwater in farmlands was positively related to the application rate of nitrogen chemical fertilizer,the population density and the proportion of cultivated area.The NO-3-N concentrations were declined with the lowering of the groundwater table,but there was no significant correlation between them.When the application of chemical fertilizer nitrogen exceeds 100 kg/hm2,or the groundwater table is less than 9 m,the NO-3-N concentration of groundwater has the potential risk of exceeding the WHO limit." @default.
- W2386609828 created "2016-06-24" @default.
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- W2386609828 date "2011-01-01" @default.
- W2386609828 modified "2023-09-24" @default.
- W2386609828 title "Studies on Groundwater Nitrate Nitrogen Distribution and its Affecting Factors in Chao Lake Watershed" @default.
- W2386609828 hasPublicationYear "2011" @default.
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