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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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The objective of this study was to compare concentrations of nutrients such as total nitrogen (TN), nitrate nitrogen (NO3-N) total phosphorous (TP), and phosphate phosphorous (PO₄-P) in groundwater under paddy and upland fields, and surface water recharging from a rural mixed land-use watershed. Chinese cabbage and hot pepper were cultivated on the upland field plot. The TN concentrations in upland groundwater showed double peaks (4.7, 4.3 mg/L, respectively) in April 2009 shortly after fertilizer application, indicating that TN concentrations are greatly influenced by fertilization. However, the TN concentrations in paddy groundwater were always lower than 2.0 mg/L irrespective of fertilization.
Whereas the mean concentrations of TN and NO₃-N in upland groundwater significantly (p＜0.05) higher than those in surface water, the mean concentrations of TP and PO₄-P in upland groundwater were significantly lower than those in surface water. On the other hand, the mean concentrations of TN, NO₃-N, TP and PO4-P in paddy groudwater were significantly (p＜0.05) lower than those in surface water. The TN concentrations in upland groundwater were generally higher than those in surface water during early April to early December due to the effect of fertilization, but vice versa in the other periods. In contrast, the TP concentrations in upland groundwater were always lower than those in surface water due to the sorption of inorganic phosphorous by soil. Moreover,the TN and TP concentrations in paddy groundwater were always lower than those in surface water, and therefore paddy groundwater may dilute nutrient concentrations in surface water when paddy groundwater and surface water mix.
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참고문헌 (15)
참고문헌 신청
Babiker, I. S / 2004 / Assessment of groundwater contamination by nitrate leaching from intensive vegetable cultivation using geographical information system / Environment In
Choi, W. J. / 2007 / Impact of land-use types on nitrate concentration and delta N-15 in unconfined groundwater in rural areas of Korea / AGRICULTURE ECOSYSTEMS & ENVIRON
Gburek W. J / 1999 / Flow and chemical contributions to streamflow in an upland watershed / A base study, J. of Hydrology 217 : 1 ~ 18
Halberg, G. R / 1989 / Nitrate in groundwater in the United States. In Nitrogen Management and Groundwater Protection: Developments in Agricultural and Managed- Forest Ecology 21 / Elsev
Heathwaite, A. L. / 1996 / Trend in nutrients / Hydro. Process 10 (2) : 263 ~ 293
Choi, W. J. / 2007 / Impact of land-use types on nitrate concentration and delta N-15 in unconfined groundwater in rural areas of Korea / AGRICULTURE ECOSYSTEMS & ENVIRON
Gburek W. J / 1999 / Flow and chemical contributions to streamflow in an upland watershed / A base study, J. of Hydrology 217 : 1 ~ 18
Halberg, G. R / 1989 / Nitrate in groundwater in the United States. In Nitrogen Management and Groundwater Protection: Developments in Agricultural and Managed- Forest Ecology 21 / Elsev
Heathwaite, A. L. / 1996 / Trend in nutrients / Hydro. Process 10 (2) : 263 ~ 293
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