Korean Journal of Agricultural and Forest Meteorology (한국농림기상학회지)

Korean Society of Agricultural and Forest Meteorology (한국농림기상학회)
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Nutrient Use Strategy of Carpinus cordata Saplings Growing under Different Forest Stand Conditions

임분 조건이 다른 환경에서 하층식생으로 생육하는 까치박달(Carpinus cordata) 유목의 양분 이용 특성

  • Kwon, Boram (Department of Forest Resources, Kangwon National University) ;
  • Heo, Namjun (Department of Forest Resources, Kangwon National University) ;
  • Shin, Hoyong (Department of Forest Resources, Kangwon National University) ;
  • Kim, Hyun Seok (Department of Forest Sciences, Seoul National University) ;
  • Park, Pil Sun (Department of Forest Sciences, Seoul National University) ;
  • Yi, Myong Jong (Department of Forest Resources, Kangwon National University)
  • Received : 2014.08.13
  • Accepted : 2014.09.29
  • Published : 2014.09.30
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Abstract

This study aimed to understand the nutrient absorption, usage and allocation of Carpinus cordata in different soil and light environments. Seasonal changes of foliar nitrogen, phosphorous, chlorophyll contents, leaf mass per area (LMA) and nutrient retranslocation rates were investigated for C. cordata saplings growing in a natural deciduous broadleaved forest and an Manchurian fir (Abies holophylla) plantation in Gwangneung, Kyunggido. The deciduous forest had lower leaf area, higher light penetration, and better soil fertility than the Manchurian fir forest. However, available soil phosphorous content in the deciduous forest was only one third of that in the Manchurian fir forest, which caused lower foliar phosphorous content and higher P retranslocation rate of C. cordata in the deciduous forest than that in the Mancurian fir forest. Soil nitrogen contents in the deciduous forest were higher than that in the Manchurian fir forest, however, no differences in foliar nitrogen content and retranslocation rate in C. cordata between the two stands were found. C. cordata in the Manchurian fir forest with high LAI throughout a year, had lower LMA, foliar nitrogen content and chlorophyll a/b, while had higher total chlorophyll content and chlorophyll/N than that in the deciduous forest. These results implied C. cordata under different environments are using different strategies for nutrient use and allocations.

경기도 광릉의 국립수목원 내의 토양과 빛 환경이 서로 다른 낙엽활엽수림과 전나무림에서 하층식생으로 생육하는 까치박달의 자원의 획득과 이용 및 분배를 이해하기 위하여, 잎의 질소와 인 농도의 계절 변화와 재전류, 엽록소와 LMA를 조사하였다. 엽면적 지수가 상대적으로 낮은 낙엽활엽수림은 유입되는 광량이 많았고, 전반적인 토양 양분의 수준이 양호하였으나, 유효인산의 농도는 전나무림의 1/3 수준으로 현저히 낮았다. 이로 인해, 낙엽활엽수림에서 생육하는 까치박달의 경우, 잎의 인 농도가 전나무림의 까치박달 보다 연중 낮았고, 재전류율은 상대적으로 높게 나타났다. 토양 내 질소 농도는 상대적으로 낙엽활엽수림에서 높았으나, 계절별 잎의 질소농도와 질소의 재전류율은 임분간의 유의적 차이는 없었다. 빛의 유입이 적은 전나무림에서는 까치박달의 LMA와 엽면적당 질소 분배가 상대적으로 낮았으며, 또한 엽록소 a/ｂ율은 낮고, 총 엽록소 함량은 높여 질소에 대한 엽록소의 비율이 높았다. 이러한 결과는 임분 조건이 서로 다른 낙엽활엽수림과 전나무림에서 생육하는 까치박달이 주어진 토양과 빛 환경에 순응하여 양분의 동태와 분배의 전략적 차이를 달리하여 생육하고 있음을 시사한다.

Keywords

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