묘포지내 토양개량제 처리가 토양 이산화탄소 방출에미치는 영향

김춘식,안현철,조현서,추갑철 진주산업대학교 농업기술연구소 2007 農業技術硏究所報 Vol.20 No.-

묘포지에 토양 토양개량제인 목탄 500g, 목탄 500g+퇴비 1000g, 목탄 500g+요소 50g 을 토양에 처리한 후 토양특성 및 토양이산화탄소 방출량에 미치는 영향을 조사하였다. 토양개량제 처리구의 토양용적밀도, 토양수분, 토양온도는 대조구인 무처리구와 차이가 없었다. 그러나 토양pH의 경우 목탄, 목탄+퇴비처리구의 토양 pH는 대조구에 비해 높아졌으나, 목탄 +요소처리구는 대조구에 비해 토양 pH가 낮아졌다. 평균 토양 이산화탄소 방출량의 경우 대조구의 경우 0.62gCO_(2)/m^(2)/h, 목탄처리구 0.64gCO_(2)/m^(2)/h, 목탄+퇴비처리구 0.68gCO_(2)/m^(2)/h, 목탄+요소처리구 0.58gCO_(2)/m^(2)/h 로서 목탄+요소처리구가 가장 낮은 방출량을 보였다. This study was carried out to evaluate effects on soil property and soil CO2 efflux following soil conditioner treatments (wood charcoal 500g, wood charcoal 500g+compost 1000g, wood charcoal 500g+urea 50g) in a forest nursery. Soil bulk density, soil moisture content and soil temperature were not different between soil conditioner treatments and control. However, soil pH was higher in wood charcoal and wood charcoal+compost treatments than in control, while soil pH was lower in wood charcoal+urea treatment than in other treatments. Soil CO2 efflux was highest in wood charcoal+compost (0.68gCO_(2)/m^(2)/h), followed by wood charcoal (0.64gCO_(2)/m^(2)/h), control (0.62gCO_(2)/m^(2)/h), and wood charcoal+urea (0.58gCO_(2)/m^(2)/h) treatments.

종격동 종괴를 의심케한 우대동맥궁 1례

김만우,백학연,정춘해,장경식,홍순표,조건국,김종진 朝鮮大學校 附設 醫學硏究所 1987 The Medical Journal of Chosun University Vol.12 No.1

Developmental anomalies of the aortic arch, commonly known as vascular rings, are relatively rare congenital vascular anomalies which can compress the trachea and esophagus. One routine chest film of a patient who was checked and hepatoma-diagnosed in Internal Medicine, Chosun University Hospital left the room for doubt of mediastinal mass. But no subjective symptoms for the mass was told by the patient. This is to report our experience of a patient having right side aortic arch with aberrant left subclavian artery, as proved by diagnosis, but none of congenital heart disease. This right side aortic arch with aberrant left subclavian artery is the most frequent type among right aortic arch, the anomaly of which is usually detected from the incidental suspicion for mediastinal mass at routine chest film; because no symptoms are accompanied therewith.

낙엽송, 소나무, 리기테다소나무조림지내 탄소저장량의 정량적 비교

김춘식,김우룡,안현철 진주산업대학교 농업기술연구소 2004 農業技術硏究所報 Vol.17 No.-

This study was carried out to evaluate carbon storage of three coniferous plantations (Larix kaempferi, Pinus densiflora, Pinus rigitaeda) growing on similar site with a same planting age (42-year old) in the Sambong Exhibition Forests located in Hamyang-gun, Gyungsangnam-do. Aboveground biomass carbon of three plantations was 77.2tC/ha for P. rigitaeda, 46.3tC/ha for L. kaempferi and 30.7tC/ha for P. densiflora, given basal area of 35.6㎡/ha, 26.4㎡/ha, and 18.3㎡/ha, respectively. The plantations stored 176.1tC/ha for P. rigitaeda, 143.6tC/ha for L. kaempferi and 139.8tC/ha for P. densiflora. The soil carbon ranged from 53.5% to 73.6% of the plantation carbon storage. Soil carbon storage in 0~20cm depth stayed relatively constant throughout the plantation's development and was not affected by plantation types. The difference of carbon storage among three plantations was attributable largely to changes in aboveground biomass carbon storage.

백서에서 신 허혈성 손상에 미치는 칼슘 길항제의 효과

문철웅,정종훈,박천국,이승일,배학연,장경식,김만우,정춘해,홍순표,이병래,김호중 朝鮮大學校 附設 醫學硏究所 1993 The Medical Journal of Chosun University Vol.18 No.1

Renal ischemia is one of the most common causes of acute renal failure. Four factors related to the pathogenesis of acute renal failure are vasoconstriction, decreased glomerular filtration rate, tubular back leak of filtrate, and intratubular obstruction. The cellular response to renal ischemic insults include decreased content of adenosine trihosphate, lipid peroxidation induced membrane degradation, alteration in cellular pH, and calcium or phospholipase induced mitochondrial dysfunction. Much attention has been given to the role of increased cellular calcium as a pathogenetic contributor to cell injury during ischemia. Author studied the protective effects of calcium antagonists on cellular injury during renal ischemia in rat. To investigate the protective role of these agents, author measured the amount of malondialdehyde(MDA) and the enzyme activities of free radical scarvengers-superoxide dismutase(SOD), catalase and glutathione peroxidase from non-pretreated group and calcium antagonists pretreated groups in control, ischemia and reflow subgroups. The results were summerized as follows: 1) The amount of MDA in non-pretreated group was higher in the reflow compared with the control(<p<0.01). But, in all pretreated groups, there was no statistically difference in the amount of MDA. 2) The SOD activity in non-pretreated group was lower in both the ischemia and the reflow compared with the control (P<0.05). But, in both verapamil and trifluoperazine-pretreated groups, there was no statistically difference in the SOD activity. 3) Both catalase and glutathione peroxidase activities in non-pretreated group were lower in both the ischemia and the reflow compared with the control (P<0.05). But in all pretreated groups, there was no statically difference in both catalase and glutathione peroxidase activities. These results suggest that free radical mediated ischemic injury by renal artery clamp in rat can be protected by intraperitoneal pretreatment with calcium antagonists. As trifluoperazine has a protective effect in renal ischemia, the calcium activated calmodulin dependent enzyme may play a role in renal ischemic injury.

Cellulose Decomposition Rates in Clear-cut and Uncut Red Pine (Pinus densiflora S. et Z.) Stands

( Choon Sig Kim ),( Hyun Chul An ),( Jae Kyung Byun ) 한국산림과학회 2010 Forest Science And Technology Vol.6 No.1

Soil Respiration Rates in Fertilized and Unfertilized Larch (Larix Leptolepis) Plantations

( Choon Sig Kim ),( Oue Ryoung Kim ),( Hyun Chul Ahn ),( Hyun Seo Cho ),( Gyoung Soo Jang ),( Jin Young Park ),( Hong Woo Lee ) 한국임학회 2005 한국임학회 학술발표논문집 Vol.2005 No.-

Effects of Stand Density on Carbon Dynamics in a Larch (Larix leptolepis) Plantation

( Choon Sig Kim ) 한국산림과학회 2004 한국산림과학회지 Vol.93 No.6

N/A This study was conducted to evaluate forest carbon dynamics on two different stand densities in a 36-year-old larch(Larix leptolepis) plantation, Korea. Aboveground carbon storage, litterfall, litter decomposition, soil carbon storage and soil respiration rates on high(600 trees/ha) and low stand density (387 trees/ha) were measured for two years. Aboveground carbon storage and increment of the high stand density were generally higher compared with the low stand density due to effect on stand density. Organic carbon inputs by needle litter were significantly higher in high than in low stand density. Needle litter decomposition rates were not significantly different between both stand densities. However, decomposition rates in fine roots were generally higher in high than in low stand density. Soil carbon concentration and storage were not significantly different between both stand densities at each depth. Soil respiration rates were relatively similar between both stand densities during the study period corresponding with the fluctuation of soil temperature, while soil moisture content was not related with soil respiration. The results indicate that carbon dynamics in this larch plantation were not affected by stand density except for needle litter production and aboveground carbon increment by a tree basis.

Post-fire Effects on Soil Properties in Red Pine (Pinus densiflora) Stands

( Choon Sig Kim ),( Kyo Sang Koo ),( Jae Kyung Byun ),( Jin Heon Jeong ) 한국임학회 2005 Forest Research Vol.1 No.1

Soil Carbon Cycling and Soil CO₂ Efflux in a Red Pine (Pinus densiflora) Stand

Kim, Choon-Sig The Ecological Society of Korea 2006 Journal of Ecology and Environment Vol.29 No.1

This study was conducted to evaluate forest carbon cycling and soil $CO_2$ efflux rates in a 42-year-old pine (Pinus densiflora) stand located in Hamyang-gun, Korea. Aboveground and soil organic carbon storage, litterfall, litter decomposition, and soil $CO_2$ efflux rates were measured for one year. Estimated aboveground biomass carbon storage and increment in this stand were $3,250gC/m^2\;and\;156gC\;m^{-2}yr^{-1}$, respectively. Soil organic carbon storage at the depth of 30 cm was $10,260gC/m^2$ Mean organic carbon inputs by needle and total litterfall were $176gC\;m^{-2}yr^{-1}\;and\;235gC\;m^{-2}yr^{-1}$, respectively. Litter decomposition rates were faster in nne roots less than 2 mm diameter size ($<220\;g\;kg^{-1}yr^{-1}$) than in needle litter ($<120\;g\;kg^{-1}yr^{-1}$). Annual mean and total soil respiration rates were $0.37g\;CO_2m^{-2}h^{-1}$ and $2,732g\;CO_2m^{-2}yr^{-1}$ during the study period. A strong positive relationship existed between soil $CO_2$ efflux and soil temperature (r=0.8149), while soil $CO_2$ efflux responded negatively to soil pH (r=-0.3582).

Effects of Forest Tending Works on Carbon Storage in a Pinus densiflora Stand

Kim, Choon-Sig,Son, Yo-Hwan,Lee, Woo-Kyun,Ha, Yeong-Cheol,Jeong, Jae-Yeob,Noh, Nam-Jin The Ecological Society of Korea 2007 Journal of Ecology and Environment Vol.30 No.4

We conducted research to determine the effects of forest tending works (FTW) on forest carbon (C) storage in Korean red pine forests by estimating changes in the quantity and distribution of stored organic C in an approximately 40-year-old red pine stand after FTW. We measured organic C storage (above- and belowground biomass C, forest floor C, and soil C at 50 cm depth) in the Hwangmaesan Soopkakkugi model forest in Sancheonggun, Gyeongsangnam-do before and after the forest was thinned from a density of 908 trees/ha to 367 trees/ha. The total C stored in tree biomass was 69.5 Mg C/ha before FTW and 38.6 Mg C/ha after FTW. The change in total C storage in tree biomass primarily resulted from the loss of 19.9 Mg C/ha stored in stem biomass after FTW. The total C pool in this red pine stand was 276 Mg C/ha before FTW and 245.1 Mg C/ha after FTW. Prior to FTW, 71.5% of the total C pool was stored in mineral soil, 25.2% in tree biomass, and 3.3% in the forest floor, where as after FTW 80.5% of the total C pool was stored in mineral soil, 15.7% in tree biomass and 3.7% in the forest floor. These results suggest that the development of site-specific tending techniques may be required to minimize the loss of tree biomass C storage capacity in red pine stands from FTW.