Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
권호 표지

Effects of Thinning on Nutrient Input by Rainfall and Litterfall in Natural Hardwood Forest at Mt. Joongwang, Gangwon-do

강원도 중왕산 지역 천연활엽수림에서 간벌작업이 강우와 낙엽에 의한 양분 유입에 미치는 영향

  • Jung, Mun-Ho (Rock Engineering Team, Technology Research Center Mine Reclamation Corporation) ;
  • Lee, Don-Koo (Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University) ;
  • Um, Tae-Won (Department of Forest Sciences, College of Life Science & Natural Resources, Sangii University) ;
  • Kim, Young-Soo (Forest Practice Research Center, Korea Forest Research Institute) ;
  • Kwon, Ki-Cheol (Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University) ;
  • Jung, Kang-Ho (Soil Management Divison, Department of Agricultural Environment National Institute of Agricultural Science & Technology Rural Development Administration)
  • 정문호 (광해방지사업단 기술연구센터 암반공학연구팀) ;
  • 이돈구 (서울대학교, 농업생명과학대학) ;
  • 엄태원 (상지대학교 생명자원과학대학) ;
  • 김영수 (국립산림과학원, 산림생산기술 연구소) ;
  • 권기철 (서울대학교, 농업생명과학대학) ;
  • 정강호 (농촌진흥청, 농업과학기술원)
  • Received : 2007.09.30
  • Accepted : 2007.12.02
  • Published : 2008.02.28
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Abstract

The objectives of this study were to compare nutrient natural input between thinned and unthinned natural hardwood stands at Mt. Joongwang, Pyongchang-gun, Gangwon-do. Throughfall, stemflow, A-layer and B-layer soil water as well as litterfall were sampled at two-week intervals during the period of June to October from 2002 to 2004. The amount of rainfall interception in thinned and unthinned natural hardwood stands was as 12% and 18%, respectively. The results indicated that there was no difference in annual nutrient input by rainfall between thinned and unthinned stands. $Na^+$, $Cl^-$ and $SO_4{^{2-}}$ concentrations of A-layer soil water in the unthinned stand were higher than those in the thinned stand. In the B-layer soil water, $Ca^{2+}$, $Cl^-$, $NO_3{^-}$ and $SO_4{^{2-}}$ concentrations in the unthinned stand were higher than those in thinned stand. Mean annual litterfall input was $2,706kg\;ha^{-1}$ in unthinned stand and $2,589kg\;ha^{-1}$ in thinned stand. Total-N input from litterfall was $50.28kg\;ha^{-1}yr^{-1}$ in the unthinned stand and $36.81kg\;ha^{-1}yr^{-1}$ in the thinned stand, while there was no difference in exchangeable cation input from litterfall between thinned and unthinned stands. Thus, the difference in nutrient inputs except for N by throughfall, stemflow and litterfall between the two stands was not influenced by thinning.

본 연구의 목적은 강원도 평창군에 위치한 중왕산 지역에서 천연활엽수림 내 간벌작업지와 비작업지에서 양분 유입의 차이를 비교하는 것이었다. 임내강우와 임외강우, 낙엽낙지에 의한 양분 유입량과 토양수 내 양분 농도를 조사하기 위하여2002년부터 2004년까지 임내강우와 임외강우, 토양수는 매년 6월부터 10월 사이에 격주간 채취하였고, 낙엽낙지는 매년 9월과 10월에 채취하였다. 조사 기간동안 강우 차단율은 간벌작업지에서 12%, 비작업지에서 18%였다. 수관통과우와 수간류에 의한 양분 유입량은 간벌작업지와 비작업지에서 차이를 보이지 않았다. 토양수 내 이온 농도는 A층에서는 $Na^+$, $Cl^-$ $SO_4{^{2-}}$ 이온이, B층에서는 $Ca^{2+}$, $Cl^-$ $NO_3{^-}$, $SO_4{^{2-}}$ 이온이 비작업지에서 다소 높았다. 연간 낙엽낙지량은 간벌작업지에서 $2,589kg\;ha^{-1}$로, 비작업지의 $2,706kg\;ha^{-1}$보다 적은 유입량을 보였다. 낙엽낙지에 의한 양분 유입량은 N의 경우, 간벌작업지에서 $36.81kg\;ha^{-1}yr^{-1}$, 비작업지에서 $50.28kg\;ha^{-1}yr^{-1}$였으나, 양이온의 유입량은 차이가 없었다. 이를 종합해 볼 때, 본 연구에서 수관통과우와 수간류 및 낙엽낙지에 의한 양분유입량의 간벌에 의한 영향은 질소를 제외한 다른 양분에서는 없었던 것으로 나타났다.

Keywords

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