시설재배지 토양의 유거수에 의한 염류의 이동

Salt Movement of Soils by Runoff in Green House Area

  • Kang, Bo-Koo (Chungbuk Agricultural Research and Extension Services) ;
  • Kim, Hyun-Ju (Chungbuk Agricultural Research and Extension Services) ;
  • Lee, Kyung-Ja (Chungbuk Agricultural Research and Extension Services) ;
  • Kim, Jai-Joung (Dept. of Agricultural Chemistry, College of Agriculture, Chungbuk National University) ;
  • Hong, Soon-Dal (Dept. of Agricultural Chemistry, College of Agriculture, Chungbuk National University)
  • 발행 : 2001.06.30

초록

염류가 집적된 시설재배지 토양에 대한 유거수에 의한 염류의 이동을 조사하여 농업환경보전자료로 활용하고자 충북 청주지역 시설재배농가 포장에 유거수를 수거할 수 있는 lysimeter를 설치하여 시험을 수행한 결과 다음과 같다. 본 시험중에 내린 강우량의 유거수율은 $38{\sim}77%$의 범위로 평균 58% 이었고 유거수중의 양이온 평균 함량은 $Ca^{2+}(27.12\;mg/L)$ > $K^-(9.18\;mg/L)$ > $Mg^{2+}(2.53\;mg/L)$ > $Na^+(1.89\;mg/L)$의 순이었으며 음이온들의 평균 함량은 $SO_4\;^{2-}(63.38\;mg/L)$ > $NO_3\;^-(25.40\;mg/L)$ > $Cl^-(4.19\;mg/L)$ > $PO_4\;^{3-}(3.18\;mg/L)$의 순이었다. 조사기간중에 내린 강우량의 유거수에 의한 용탈량은 농도가 가장 높았던 $SO_4\;^{2-}$가 140.1 kg/ha 로 가장 많았으며 그 다음은 $Ca^{2+}:$ 59.9 kg/ha, $NO_3\;^-:$ 56.1 kg/ha, $K^+:$ 20.3 kg/ha, $Cl^-:$ 9.3 kg/ha, $PO_4\;^{3-}:$ 7.0 kg/ha, $Mg^{2+}:$ 5.6 kg/ha, $Na^+:$ 4.2 kg/ha 순이었다. 유거수의 $PO_4\;^{3-}$의 함량 및 용탈량은 토양에 집적된 함량에 비하여 낮았다.

Salt accumulation and movement by runoff ware studied in runoff resevior lysimeter constructed in a green house located in the area of Cheongju, Chungbuk province. Average runoff ratio of rainfall within period of this experiment was 58%. The average content of cations lost from field soil by runoff was in the order of $Ca^{2+}(27.12\;mg/L\;)$ > $K^+(9.18\;mg/L)$ > $Mg^{2+}(2.53\;mg/L)$ > $Na^+(1.89\;mg/L)$ and in the care anions $SO_4\;^{2-}(63.38\;mg\;/L)$ > $NO_3\;^-(25.40\;mg/L)$ > $Cl^-(4.19\;mg/L)$ > $PO_4\;^{3-}(3.18\;mg/L)$. Amounts of salt movement by runoff $SO_4\;^{2-}(140.2\;kg/ha)$, $Ca^{2+}(59.9\;kg/ha)$, $NO_3\;^-(56.1\;kg/ha)$, $K^+(20.3\;kg/ha)$, $Cl^-(9.3\;kg/ha)$, $PO_4\;^{3-}(7.0\;kg/ha)$, $Mg^{2+}(5.6\;kg/ha)$ and $Na^+(4.2\;kg/ha)$. The loss amount of $PO_4\;^{3-}$ was the lowest among the anions investigated in this experiment. $P_2O_5$ was accumulated on the soil surface due to strong affinity for the sorption site on the soil particle surface.

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