The Korean Journal of Ecology

한국생태학회 (The Ecological Society of Korea)
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강원도 춘천지역 낙엽활엽수림에서의 수분이동에 따른 양분동태

Nutrient Dynamics through Water Transport in Natural Deciduous Hardwood Forests in Chunchon, Kangwon Province

  • 발행 : 2003.02.01
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초록

본 연구에서는 강원도 춘천지역 낙엽활엽수림(굴참나무, 신갈나무)에서의 강우의 이동에 따른 수량, 용존원소 농도 및 물질량 등을 조사하였다. 임외우량에 대한 각 강우량의 비율은 굴참나무임분이 신갈나무임분에 비하여 수관통과우에서 2∼3%, 그 외의 강우에서 10∼15%의 증가량을 나타내고 있었다. 임외우에 비하여 수관통과우에서는 K/sup +/농도가, Ao층통과우에서는 Ca/sup 2+/, Mg/sup 2+/, NO₃/sup -/농도가 현저하게 증가하였는데, 이는 전자의 원소농도에서는 수관으로부터의 용탈, 후자의 원소농도에서는 Ao층으로부터의 용탈 및 질산화 작용에 기인한 것이라 판단된다. 수관통과우, Ao층통과우 및 A, B층토양수에 있어서 원소농도는 수량이 증가함에 따라 감소하는 경향을 보였는데, 특히 K/sup +/, Mg/sup 2+/, Cl/sup -/농도에서 현저하였다. Ao층통과우의 Ca/sup 2+/에서 굴참나무임분이 신갈나무임분에 비하여 1.5배 정도 높은 값을 나타낸 것 이외에는 다른 강우의 물질량에 있어서는 임분 간 뚜렷한 차이는 없었다. 연간 수간류 물질량은 임상으로 도달하는 강우(수관통과우+수간류)물질량의 10% 미만이었는데, 양적인 면으로 보아 물질순환 과정에 있어서 수간류의 비중은 작다고 판단된다.

We examined water flux, concentrations and contents in nutrients in precipitation, throughfall, stemflow and soil solution in natural deciduous hardwood forest(Quercus variabilis and Q. mongolica) in Chunchon, Kangwon Province. The volume of throughfall was 2∼3% higher in Q. variabilis than in Q. monglica while volume of stemflow, Ao, A and B soil solution was 10∼15% higher in Q. variabilis compared to Q. monglica. Concentrations of K/sup +/ increased in throughfall H while concentrations of Ca/sup 2+/, Mg/sup 2+/ and NO₃/sup -/ increased in Ao soil solution. The former might be related to the canopy leaching and the latter related to leaching and nitrification in Ao horizon. Nutrient concentrations in throughfall, Ao, A and B soil solution decreased with increasing amount of water and especially the decreases in concentrations of K/sup +/, Mg/sup 2+/ and Cl/sup -/ were significant. Nutrient concentrations of Ca/sup 2+/ in Ao soil solution was 1.5 times higher in Q. variabilis than in Q. mongolica. However, there were no significant nutrient concentration differences in throughfall, stemflow and A and B soil solution between the two forest types. Stemflow was less than 10% of total water volume (throughfall + stemflow) to the forest floor, and contribution of stemflow to nutrient cycling seemed to be low in the study forest.

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참고문헌

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