The Korean Journal of Ecology

The Ecological Society of Korea (한국생태학회)
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Growth of Pinus densiflora Seedlings in Artificially Acidified Soils

인위적인 토양 산성화가 소나무 묘목의 생장에 미치는 영향

  • Lee, Choong-Hwa (Department of Forest Environment, Korea Forest Research Institute) ;
  • Lee, Seung-Woo (Department of Forest Environment, Korea Forest Research Institute) ;
  • Kim, Eun-Young (Department of Forest Environment, Korea Forest Research Institute) ;
  • Kim, Young-Kul (Department of Forest Environment, Korea Forest Research Institute) ;
  • Byun, Jae-Kyoung (Department of Forest Environment, Korea Forest Research Institute) ;
  • Won, Heong-Gyu (Department of Forest Environment, Korea Forest Research Institute) ;
  • Jin, Hyun-O (College of Life Science and Natural Resources, Kyunghee University)
  • 이충화 (국립산림과학원 산림환경부) ;
  • 이승우 (국립산림과학원 산림환경부) ;
  • 김은영 (국립산림과학원 산림환경부) ;
  • 김영걸 (국립산림과학원 산림환경부) ;
  • 변재경 (국립산림과학원 산림환경부) ;
  • 원형규 (국립산림과학원 산림환경부) ;
  • 진현오 (경희대학교 생명과학부)
  • Published : 2005.12.31
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Abstract

This study was carried out to investigate the effects of soil acidification on the growth of 3-year-old Pinus densiflora seedlings grown for 21 weeks in brown forest soils acidified with $H_2SO_4$ solution. The concentrations of Al in the acidified soils were increased with increasing amount of $H^+$ added to the soil. The total dry weight of the seedlings was reduced by the addition of the $H_2SO_4$ solution. In addition, there was a strong positive correlation (r=0.97, p<0.01) between the dry weight of the seedlings and the molar (Ca+Mg+K)/Al ratio of the soil. The seedlings with the molar (Ca+Mg+K)/Al ratio of 1.0 resulted from approximately 50% growth reduction compared with the control value. The results suggest that the molar (Ca+Mg+K)/Al ratio of the soil may be a useful indicator for assessing the critical load of acid deposition.

황산용액을 첨가하여 인위적으로 산성화시킨 화강암 풍화 모재의 갈색 산림 토양에 2-1 소나무(Pinus densiflora) 묘목을 이식하고, 1998년 4월 29일부터 9월 22일까지 21주 동안 온실에서 생육시킨 후 건물생장량과 토양 pH, Al, Mn 농도 또는 염기성 양이온 몰비 사이의 관계를 조사한 결과, 토양내 $H^+$ 부하량의 증가는 토양중 Al 농도의 증가를 초래하였다. 소나무 묘목의 건물 생장량은 토양의 Al 농도가 높아짐에 따라 감소하였다. 토양의 (Ca+Mg+K)/Al 몰비와 건물 생장량 사이에는 유의적인 정의 상관관계(r=0.97, p<0.01)가 있었으며, 몰비가 1.0인 경우에 약50%의 건물 생장량의 감소가 발생하였다. 이들의 결과는 산성 강하물에 의한 토양 산성화가 수목에 미치는 영향을 평가할 때, 토양의 Al과 같은 유해금속의 변화를 고려할 필요가 있으며, (Ca+Mg+K)/Al 몰비는 산성 강하물의 삼림생태계 피해예측을 위한 한계 부하량의 평가에 있어 중요한 지표가 될 수 있을 것으로 판단된다.

Keywords

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