한국농림기상학회지, 제 11권 제4호(2009) (pISSN 1229-5671, eISSN 2288-1859)
Korean Journal of Agricultural and Forest Meteorology, Vol. 11, No. 4, (2009), pp. 247~251
DOI: 10.5532/KJAFM.2009.11.4.247
ⓒ Author(s) 2014. CC Attribution 3.0 License.


일본 서부 낙엽활엽수림의 차단 강수가 토양호흡에 미치는 영향 평가

일본 독립행정법인 삼림총합연구소

(2009년 06월 04일 접수; 2009년 10월 27일 수정; 2009년 11월 20일 수락)

Experimental Estimation of the Effect of Rainfall Interception on
Soil Respiration in a Broad-leaved Deciduous Forest
in Western Japan

Forestry & Forest Products Research Institute, Matsunosato, Tsukuba, Ibaraki 305-8687, Japan

(Received June 04, 2009; Revised October 27, 2009; Accepted November 20, 2009)

ABSTRACT
To estimate the effect of rainfall on soil respiration, soil CO2 efflux was measured with a manipulation of rainfall interception at a broad-leaved deciduous forest in western Japan from 20 February to 19 November 2001. The diurnal patterns of soil respiration observed at the intercepted subplot (Fc) were quite similar to those of soil temperature at 0.2 m depth with a maximum around midnight and a minimum from noon to early afternoon. Such diurnal patterns have not been observed in the previous studies at the same study site under natural conditions (which manifested no clear diurnal variations). Furthermore, the magnitudes of Fc showed substantial differences (e.g., ~50% reduction under water-limited conditions) compared to those of the potential soil respiration under natural conditions (Fcal). These findings demonstrate that rainfall events not only affected the magnitude of soil CO2 efflux but also modified the vertical structure of soil temperature, thereby altering diurnal patterns of soil respiration.

Keyword: Soil respiration, Rainfall, Soil temperature, Soil moisture, Deciduous forest

MAIN

적요

강우가 토양 호흡에 미치는 영향을 평가하기 위해, 일본 서부에 위치한 활엽수림에서 2001년 2월 20일부터 11월 19일까지 강우를 차단한 상태에서 토양 CO2 플럭스를 측정하였다. 강우가 차단된 관측지의 토양 호흡(Fc)의 일변화는 0.2m 깊이의 토양 온도의 일변화와 매우 비슷하였으며, 자정에 최고값을 보이고 정오에서 이른 오후 사이에 최저값을 나타내었다. 이러한 뚜렷한 일변화 패턴은 같은 관측지에서 강우가 차단되지 않은 상태에서 관측된 선행연구의 결과(뚜렷한 일변화의 부재)와 대조되었다. 또한, 자연상태의 가능토양호흡(potential soil respiration, Fcal)의 크기와 비교할 때, 강우가 차단된 관측지의 토양호흡은 매우 큰 차이(예를 들면, 토양수분이이 부족할 때 약 50% 감소)를 보였다. 이 연구결과는 강우가 토양 CO2 플럭스의 크기뿐만이 아니라 토양온도의 연직 프로파일을 바꿈으로써 토양호흡의 일변화 양상에도 영향을 미침을 보여준다.

REFERENCES

Davidson, E. A., K. Savage, L. V. Verchot, and R. Navarro, 2002: Minimizing artifacts and biases in chamber-based measurements of soil respiration, Agricultural and ForestMeteorology, 113, 21-37

Goto, Y., Y. Kominami, T. Miyama, K. Tamai, and Y. Kanazawa, 2003: Aboveground biomass and net primary production of a broad-leaved secondary forest in the southern part of Kyoto Prefecture, central Japan Bulletin of Forestry and Forest Products Research Institute,2, 115-147 (in Japanese with English abstract)

Jia, S., T. Akiyama, W. Mo, M. Inatomi, and H. Koizumi, 2003: Temporal and spatial variability of soil respiration in a cool temperature broad-leaved forest. 1. Measurement of spatial variance and factor analysis, Japanese Journal for Ecology, 53, 13-22 (in Japanese with Englishabstract)

Koizumi, H., M. Kontturi, S. Mariko, T. Nakadai, and Y. Bekku, 1999, Soil respiration in three soil types in agricultural ecosystems in Finland. Acta Agriculturae Scandinavica, Section B, Soil and Plant Science, 49, 65-74crossref(new window)

Kominami Y., M. Jomura, M. Dannoura, Y. Goto, K. Tamai, T. Miyama, Y. Kanazawa, S. Kaneko, M. Okumura, N. Misawa, S. Hamada, T. Sasaki, H. Kimura, and Y. Ohtani, 2008: Biometric and eddy-covariance-based estimates of carbon balance for a warm-temperate mixed forest in Japan, Agricultural and Forest Meteorology,148, 723-737crossref(new window)

Kosugi, Y., T. Mitani, M. Itoh, S. Noguchi, M. Tani, N. Matso, S. Takanashi, S. Ohkubo, and A. R. Nik, 2007: Spatial and temporal variation in soil respiration in a Southeast Asian tropical rainforest, Agricultural and Forest Meteorology, 147, 16-34crossref(new window)

Liang N. T. Nakadai, T. Hirano, L. Qu, T. Koike, Y. Fujinuma, and G. Inoue, 2004: In situ comparison of four approaches to estimating soil CO2 efflux in a northern larch(Larix kaempferi Sarg.) forest, Agricultural and Forest Meteorology, 123, 97-117crossref(new window)

Nobuhiro, T., K. Tamai, Y. Kominami, T. Miyama, Y. Goto, and Y. Kanazawa, 2003: Development of IRGA enclosed-chamber system for soil CO2 efflux measurement and its application to a spatial variation measurement, Journal of Forest Research, 8, 297-301crossref(new window)

Tamai, K., Y. Kominami, T. Miyama, and Y. Goto, 2005: Temporal fluctuations in the CO2 efflux on a forest floorthe case of an extremely immature forest soil, Journal of Agricultural Meteorology, 60, 773-776

Tamai, K., Y. Kominami, T. Miyama, Y. Goto, and Y. Ohtani,2008: Topographical effects on soil respiration in a deciduous forest -The case of weathered granite region in Southern Kyoto Prefecture, Journal of Agricultural Meteorology, 64, 215-222crossref(new window)