Korean Journal of Environment and Ecology (한국환경생태학회지)

Korean Society of Environment and Ecology (한국환경생태학회)
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Long term decomposition and nutrients dynamics of Quercus mongolica and Pinus densiflora leaf litter in Mt. Worak National Park

월악산 국립공원에서 신갈나무와 소나무 낙엽의 장기적 분해 및 영양염류 동태

  • 원호연 (공주대학교 생명과학과) ;
  • 김덕기 (국립생태원 위해생물연구팀) ;
  • 이규진 (생태계 순환 연구소) ;
  • 박상봉 (공주대학교 생명과학과) ;
  • 최중석 (공주대학교 생명과학과) ;
  • 문형태 (공주대학교 생명과학과)
  • Received : 2014.08.25
  • Accepted : 2014.10.21
  • Published : 2014.10.31
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Abstract

Decay rate and nutrient dynamics during leaf litter decomposition of deciduous broad leaf Quercus mongolica and evergreen needle leaf Pinus densiflora were investigated for 69 months from December 2005 to September 2011 in Mt. Worak National Park as a part of National Long-Term Ecological Research Program in Korea. Percent remaining weight of Q. mongolica and P. densiflora leaf litter after 69 months elapsed was $35.4{\pm}2.3%$ and $16.1{\pm}1.3%$, respectively. Decomposition of P. densiflora leaf litter was significantly faster than that of Q. mongolica leaf litter. Decay constant (k) of Q. mongolica and P. densiflora leaf litter after 69 months elapsed was 5.97 and 10.50, respectively. Initial C/N and C/P ratio of Q. mongolica leaf litter was 43.1 and 543.9 respectively. After 69 months elapsed, C/N and C/P ratio of decomposing Q. mongolica leaf litter decreased to 8.7 and 141.2, respectively. Initial C/N and C/P ratio of P. densiflora leaf litter was 151.2 and 391.4, respectively. After 69 months elapsed, C/N and C/P ratio of decomposing P. densiflora leaf litter decreased to 22.9. and 136.5. respectively. Initial concentration of N, P, K, Ca and Mg in leaf litter was 9.30, 0.23, 2.36, 3.14, 1.11 mg/g in Q. mongolica, and 3.02, 0.09, 1.00, 3.84, 0.62 mg/g in P. densiflora, respectively. Initial concentration of N and P in Q. mongolica leaf litter was significantly higher than those in P. densiflora. After 69 months elapsed, remaining N, P, K, Ca and Mg in decomposing leaf litter were 73.8, 60.9, 17.2, 20.3, 35.1 % in Q. mongolica, and 69.5, 75.3, 12.3, 10.9, 10.8 % in P. densiflora, respectively.

국가장기생태 연구사업의 일환으로 낙엽활엽수인 신갈나무와 상록침엽수인 소나무 낙엽의 분해율 및 분해과정에 따른 영양염류 함량 변화를 파악하였다. 이를 위해 2005년 12월 월악산의 신갈나무림과 소나무림에 낙엽주머니를 설치하고 2006년 3월부터 2011년 9월까지 69개월간 3개월 간격으로 낙엽주머니를 수거하여 분해율, 분해상수(k), 그리고 분해과정에 따른 C/N비, C/P비의 변화와 영양염류의 동태를 조사하였다. 분해 69개월경과 후 신갈나무와 소나무 낙엽의 잔존률은 각각 $35.4{\pm}2.3%$와 $16.1{\pm}1.3%$로 소나무 낙엽의 분해가 신갈나무 낙엽의 분해보다 빠르게 진행되는 것으로 나타났다. 분해 69개월경과 후 신갈나무 낙엽과 소나무 낙엽의 분해상수(k)는 각각 5.97과 10.50으로 소나무 낙엽의 분해상수가 높게 나타났다. 신갈나무 낙엽의 분해과정에 따른 C/N, C/P 비율은 초기에 각각 43.1, 543.9이었으나 69개월경과 후에는 각각 8.7과 141.2로 점차 감소하였으며, 소나무 낙엽의 경우 초기 C/N, C/P 비율은 각각 151.2와 391.4로 나타났고, 분해 69개월경과 후에는 각각 22.9와 136.5로 나타났다. 낙엽의 초기 N, P, K, Ca, Mg의 함량은 신갈나무 낙엽에서 각각 9.30, 0.23, 2.36, 3.14, 1.11mg/g, 소나무 낙엽에서 각각 3.02, 0.09, 1.00, 3.84, 0.62mg/g으로 신갈나무 낙엽에서 질소와 인의 함량이 현저히 높았다. 분해 69개월경과 후 N, P, K, Ca, Mg의 잔존률은 신갈나무 낙엽에서 각각 73.8, 60.9, 17.2, 20.3, 35.1%, 소나무 낙엽에서 각각 69.5, 75.3, 12.3, 10.9, 10.8%로 나타났다.

Keywords

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