한국농림기상학회지, 제 10권 제4호(2008) (pISSN 1229-5671, eISSN 2288-1859)
Korean Journal of Agricultural and Forest Meteorology, Vol. 10, No. 4, (2008), pp. 149~157
DOI: 10.5532/KJAFM.2008.10.4.149
ⓒ Author(s) 2014. CC Attribution 3.0 License.


광도 변화에 따른 5개 활엽수종의 엽록소 함량과 생장 특성

조민석(1), 권기원(1), 김길남(1), 우수영(2)
(1)충남대학교 산림자원학과, (2)서울시립대학교 환경원예학과

(2008년 11월 25일 접수; 2008년 12월 26일 수정; 2008년 12월 30일 수락)

Chlorophyll Contents and Growth Performances of the Five Deciduous
Hardwood Species Growing Under Different Shade Treatments

Min Seok Cho(1), Ki Won Kwon(1), Gil Nam Kim(1), Su Young Woo(2)
(1)Department of Environment and Forest Resources, Chungnam National University, Daejeon 305-764, Korea
(2)Department of Environmental Horticulture, University of Seoul, Seoul 130-743, Korea

(Received November 25, 2008; Revised December 26, 2008; Accepted December 30, 2008)

ABSTRACT
We investigated chlorophyll contents and growth performances of five deciduous hardwood species growing in central temperate zone of Korean forest. Cornus controversa, Fraxinus rhynchophylla, Betula schmidtii, Prunus leveilleana, and Acer mono seedlings were grown under four different light intensity regime (full sunlight, 65~72%, 29~40%, and, 7~12% of the full sunlight) for the experiment. The chlorophyll contents of all of the species were highest in 7~12% of the full sunlight, while lowest under the full sunlight. The relative growth rate of root collar diameter and height were decreased with increasing shading level except for Acer mono that showed the highest relative growth rate under 29~40% of the full sunlight. Total biomass and root volumes of the seedlings studied decreased as the light intensity decreased with different shade levels. For Acer mono, however, the biomass and root volumes were highest in 29~40% of the full sunlight. The relative growth rate of root comparing to shoot decreased as shading increased, and as a result, the ratio of aboveground to belowground biomass increased. As the shading level increased, specific leaf area (SLA), leaf area ratio (LAR), and leaf weight ratio (LWR) of most species increased.

Keyword: Cornus controversa, Fraxinus rhynchophylla, Betula schmidtii, Prunus leveilleana, Acer mono, shading, Chlorophyll contents, Biomass

MAIN

적요

본 연구에서는 층층나무, 물푸레나무, 박달나무, 개벚나무, 고로쇠나무 5개 활엽수종을 대상으로 피음 처리를 통해 4가지 수준으로 광도 조건을 달리하여 이들의 내음성 및 광 요구도에 관련된 엽록소 함량 및 생장특성으로 구분 조사하여 광도의 영향을 분석하였다.
총 엽록소 함량의 계절적 변화는 전광 처리구에서 계절별로 6월 < 9월 < 7월 순으로 증가되어 총 엽록소 함량 차이를 보였다. 엽록소 a/b율은 계절이 지남에 따라 각 피음 처리 수준별로 엽록소 b의 함량이 a의 함량보다 상대적으로 크게 증가하는 현상을 보여 전체적으로 엽록소 a/b율의 값은 6월보다 7월, 9월에 낮은 값을 보였다. 피음 처리에 따른 총 엽록소 함량은 강피음 처리구에서 가장 많았으며, 피음 수준이 높아질수록 유의적 차이를 보이면서 증가하는 경향을 보였다. 조사 대상 수종의 엽록소 a와 b의 함량은 피음 처리 수준이 높아질수록 각각 증가하였다. 그러나 피음 수준이 높아지면서 엽록소 b의 함량 증가가 엽록소 a의 함량에 비해 상대적으로 더 컸다. 이 때문에 피음 강도가 강해지면서 엽록소 a/b율이 감소하는 경향이 나타났다.
층층나무, 물푸레나무, 박달나무 및 개벚나무 근원경과 묘고의 상대생장률은 피음 수준이 높아질수록 상대생장률이 낮아지는 경향을 보였다. 그러나 고로쇠나무는 보통피음 처리구에서 가장 높은 상대생장률을 나타냈다. 고로쇠나무를 제외한 모든 실험대상 수종은 피음 처리 수준에 따른 광량 감소와 함께 총 물질생산량이 감소하였다. 그러나 고로쇠나무는 보통피음 처리구에서 가장 높은 물질생산량을 나타냈다. 광량의 감소로 잎과 가지의 비율이 뿌리에 비해 증가하는 경향을 보였으며, 피음 처리의 영향이 묘목 부위별로 다르게 작용함을 보였다. 피음 처리에 따른 뿌리의 용적은 물질생산량과 같은 경향을 나타냈다. 피음 처리에 따른 대부분의 조사 대상 수종에서 피음 수준이 높아질 수록 뿌리의 상대적인 생장비율이 감소하면서 T/R율이 증가하는 경향을 보였다. 피음 수준이 높아질수록 엽면적비(SLA), 엽면적율(LAR) 및 엽건중비(LWR)가 증가하는 경향을 보였다.

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