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This study was conducted to investigate the dynamics of nutrients such as total nitrogen (TN), nitrate nitrogen (NO3-N) total phosphorous (TP), and phosphate phosphorous (PO4-P) in outflow from a cabbage farmland in a mixed land-use watershed. The TN concentrations in groundwater showed twice peaks in late July 2006 and late March 2007 (3.8, 4.7 mg/L, respectively), when it rained shortly after fertilizer application, indicating that nitrogen leaching is greatly influenced by fertilization and rainfall. The mean concentrations of TN and NO3-N in surface water were not significantly higher than those in groundwater, while the mean concentrations of TP and PO4-P in surface water were significantly (p < 0.05) were higher than those in groundwater. The TN concentrations in groundwater were generally higher than those in surface water during fertilization and early growing season due to the effect of fertilization, but vice versa in the other periods. In contrast, the TP concentrations in groundwater were always lower than those in surface water due to the sorption of particulate phosphorous by soil. The ratio of TN load in baseflow to that in total TN load (39 %) was much greater than the TP ratio (7 %), suggesting that baseflow contribute to nitrogen export. Therefore,proper fertilization management should be taken to reduce nitrogen load through baseflow.
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참고문헌 (11)
참고문헌 신청
McCuen, R. H. / 1998 / Hydrological Analysis and Design / Prentice-Hall : 479 ~ 482
Ministry of Environment / 1997 / Standard Methods for Water Quality : 199 ~ 204
Munoz-Arboleda, F. / 2008 / Nitrate-nitrogen concentrations in the perched ground water under seepage-irrigated potato cropping systems / J. Environmental Quality 37 : 394 ~
Oh, K.Y / 2006 / Characteristics of outflow concentrations and loads of pollutants from a non-point source dominated watershed / 박사 / Chungbuk. National University
Patni, N. K. / 1998 / Groundwater quality under conventional and no tillage: I. nitrate, electrical conductivity, and pH / J. Environmental Quality 27 : 869 ~ 877
Ministry of Environment / 1997 / Standard Methods for Water Quality : 199 ~ 204
Munoz-Arboleda, F. / 2008 / Nitrate-nitrogen concentrations in the perched ground water under seepage-irrigated potato cropping systems / J. Environmental Quality 37 : 394 ~
Oh, K.Y / 2006 / Characteristics of outflow concentrations and loads of pollutants from a non-point source dominated watershed / 박사 / Chungbuk. National University
Patni, N. K. / 1998 / Groundwater quality under conventional and no tillage: I. nitrate, electrical conductivity, and pH / J. Environmental Quality 27 : 869 ~ 877
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