Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
권호 표지

Soil $CO_{2}$ Evolution in Quercus vahabilis and Q. mongolica Forestsin Chunchon, Kangwon Province

江原春川地域의 굴참나무林과 신갈나무林內 土壤 $CO_{2}$의 發生

Yi, Myong-Jong
이명종

  • Published : 2003.09.30
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Abstract

Infrared gas analysis (IRGA) method was used to measure soil COz evolution at the soil surface in threenatural deciduous oak forests (Quercus mongoIica Fish. stand and two Q. variabils Bl. stands) inChunchon, Kangwon Province. Soil moisture and soil temperature were measured concurrently with soilCOs evolution. There were strong positive correlations of soil COz evolution with soil temperature in allstudy stands, but no significant correlations between soil moisture and soil CO evolution The seasonalfluctuations in soil COa evolution increasing in summer and decreasing in winter, corresponded to changesin the soil temperature. Peaks in seasonal soil COz evolution occured in July and August. Annual meansoil COa evolution ranged from 0.51-0.52 g CO2/m'/hr for Q. variabilis stands to 0.57 g COz/m'/hr forthe Q. mongohca stand. The Qio values ranged from 3.9-4.0 for Q. variabitis stands to 5.3 for the Q.mongotica stand, In summer (June-August), soil CO2 evolution was greater in Q. mongotica stand thanin Q. variabil쓰 stands but the reverse was tme for the other seasons, In the study site, soil respirationduring summer was above 50% of annual total soil respiration (Q. variabit쓰 stands; 51.8-52.7%, Q.monghca stand; 58.8%). Annual total soil respiration was 31.45-34.84 t COz/ha/yr for the Q. variabit.그stands, and 34.17 t COz/ha/yr for Q. mongoIica stand, respectively.

강원도 춘천시 강원대학교 부속연습림의 신갈나무림 1개소와 굴참나무림 2개소에서 토양의 $CO_{2}$ 발생을적외선가스분석 (IRGA)법을 이용하여 측정하였다. 토양 $CO_{2}$ 발생 측정시 토양수분과 토양온도의 측정도동시에 수행하였다. 전 조사임분에서 토양$CO_{2}$발생은 토양온도와 높은 정의 상관관계가 있었으나 토양수분과는 유의성이 없었다. 토양 $CO_{2}$발생의 계절변화는 하절기에 증가한 후 동절기에 감소하는 경향을 보였으"1,7~8원에 연중 최고값을 나타냈다. 연평균 토양 $CO_{2}$발생속도는 굴참나무림의 0.51-0.52응 COz/m'/hr에서 신갈나무림의 0.57 g COa/m'/hr의 범위였다. Qio 값은 굴참나무림에서 3.9-4.0, 신갈나무림에서는5.3이었다. 하절기 (6-8월)의 토양 $CO_{2}$ 발생은 굴참나무림보다 신갈나무림에서 더욱 높았으나, 그 밖의계절에는 신갈나무림에서 낮았다. 모든 임분에서 하절기에 토양호흠량이 가장 많았으며, 연간 총 호흡량가운데 50% 이상 (굴참나무림 : 51.8-52.7%, 신갈나무림 :58.8%)을 차지했다. 연간 총 토양호흡량은 굴참나무 두 임분과 신갈나무림에서 각각 31.45-34.84 t $CO_{2}$/ha/yr 및 34.17 t $CO_{2}$/ha/yr 이었다.

Keywords

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