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유근옥 ( Keun Ok Ryu ),김홍은 ( Hong Eun Kim ) 한국산림과학회 2003 한국산림과학회지 Vol.92 No.3
Liriodendron tulipifera L. has been well adapted to the Korean climate since it was first introduced from the U.S.A. in the 1960`s. Recently, Korea Forest Service decided to disseminate L. tulipifera as an afforestation tree species. However, there have been no guidelines developed for seedling production of L. tulipifera in Korea. According1y, this study was conducted to develop the optimal conditions for the seedling production of L. tulipifera. For this purpose, Seeds were collected from a 40-year-old single tree planted in the garden of the Dept. of Forest Genetic Resources, Korea Forest Research Institute. Germination percentage was examined at different nursery conditions (i .e. green house, irrigation nursery, and field nursery) and with different seed covering materials (i.e. sawdust, soil, and sand). The optimal quantity of sowed seeds and optimal number of planting trees per m^2 were examined for the sake of the production of standard seedlings. Finally, the optimal time of root pruning was investigated in order to improve survival rate and to promote early growth after afforestation. The highest germination percentage (92.6%) was observed in the seeds covered with sawdust in the green house, while the lowest germination percentage (10.8%) was investigated in the seeds covered with sand in the field nursery. The optimal quantity of sowed seeds fumed out to be 50g/m^2 in the irrigation nursery and 150g/m^2 in the field nursery. Thirty five of standard seedlings were produced when 50 seedlings were Planted per m^2. The optimal time of root pruning appeared to be the beginning of August. The T/R ratio of root-pruned seedlings was 45% , which was lower than that of root-pruned seedlings, and hairy roots were more developed in the root-pruned seedlings than in the root-unpruned ones.
김인식 ( In Sik Kim ),유근옥 ( Keun Ok Ryu ),이주환 ( Joo Whan Lee ) 한국농림기상학회 2012 한국농림기상학회지 Vol.14 No.4
This study was conducted to investigate the climatic factors affecting bud phenology of Pinus densiflora provenances. Data were collected from Jungseon, Chungju and Jeju plantations which were parts of the 11 provenance trials established by Korea Forest Research Institute in 1996. The 36 provenances were included in this trial (33°30`~38°08` in latitude and 126°30`~129°20` in longitude). The bud swelling date and bud burst date of the provenances were investigated from March to May in 2004 in two-day interval. The four geographic factors and fifteen climatic factors of the test sites and provenances were considered in this study. Canonical correlation analysis was conducted to examine the major factors affecting the bud phenology. Our results suggested that the major factors affecting the timing of bud swelling and burst are the differences in latitude, longitude, extremely low temperature (during December-February), extremely high temperature (during November-February)and annual mean growing days between test plantation and provenance. The provenances with lower winter temperature than that of plantation showed the faster bud swelling and bud burst. Based on these results, the implication on the seed transfer of P. densiflora was discussed.
우리나라에 도입된 스트로브잣나무의 산지-시험지간 상호작용
최형순 ( Hyung Soon Choi ),유근옥 ( Keun Ok Ryu ),현정오 ( Jung Oh Hyun ),김인식 ( In Sik Kim ),조도현 ( Do Hyun Cho ) 한국농림기상학회 2011 한국농림기상학회지 Vol.13 No.4
This study was conducted to investigate growth performance and provenance by site interaction in Pinus strobus (Eastern White Pine) provenance tests for selecting superior provenances in Korea. P. strobus was planted in 1972 at four test sites in Korea and the growth was analyzed at age 39. The growth of P. strobus was positively correlated with relative humidity and precipitation and negatively correlated with temperature of the test sites. The portion of interaction term of the total variation explained 2.5% in height and 24.6% in diameter of the total variation according to the regression analysis. The method of combined stability and performance index (CSPi) ranked the North Carolina provenance as the best provenance with good adaptability.
SCB액비 처리량에 따른 백합나무의 생장 및 바이오에탄올 생산
김호용 ( Ho Yong Kim ),곽기섭 ( Ki Seob Gwak ),김혜연 ( Hye Yun Kim ),유근옥 ( Keun Ok Ryu ),김판기 ( Pan Gi Kim ),조도현 ( Do Hyun Cho ),최진용 ( Jin Yong Choi ),최인규 ( In Gyu Choi ) 한국목재공학회 2011 목재공학 Vol.39 No.6
SCB액비 처리가 백합나무의 생장에 미치는 영향을 조사하고 수확된 백합나무를 원료로 한 바이오에탄올 생산량 비교를 위하여, 처리량별로 처리구를 설정하고 상대 생장량, 바이오매스 생장량, 엽특성 및 구성당과 에탄올 생산량을 각각 분석하였다. SCB액비 처리를 통해 백합나무의 바이오매스 생장량(64.67 %) 및 Glucose 함량(6.07 %)이 증가하였고 이는 SCB액비에 함유된 양료 성분과 수분 함량이 엽록소 생산에 영향을 끼쳤기 때문으로 사료된다. 바이오에탄올 생산에 앞서 SCB액비 처리되어 생장한 백합나무를 유기용매 전처리 및 약산 전처리를 하였으며 반응 온도(150˚C), 승온 시간(40분), 반응 시간(10분)은 모두 동일하게 진행하였다. 전처리 효율은 중 처리구를 유기용매 전처리(w/1% 황산) 하였을 때 잔여율이 44.81%로 가장 높았으며, 치환성 양이온이 전처리 효과를 증진시킨 것으로 보인다. 전처리 된 사료를 동시당화발효하여 바이오에탄올을 생산하였으며 초기 투입량 대비 가장 높은 에찬올 생산 수율은 대 처리구에서 얻을 수 있었으나(16.11%). 바이오매스 생산량을 고려하면 중 처리구의 에탄올 생산량이 가장 많았으며, 대조구 대비 72.93% 증가하였다. The main purpose of this study was to examine the influence of treatment amounts of Slurry Composting and Biofiltration liquid fertilizer (SCGLF) on biomass growth of Yellow poplar (Liriodendron tulipifera) and to compare bioethanol production from the harvested wood Relative growth rate, biomass production and leaf characteristics were significantly enhanced by SCBLF treatment and medium treatment plot showed highest value. Nitrogen compounds and water content in SCBLF affected to increase chlorophyll contents which led improving biomass production (64.67%) and glucose contents (6.07%) than control. Organosolv and dilute acid pretreatments were preliminarily carried for bioethanol production, and the pretreatment processes were conducted at all the same solid to liquid ratio (1:10), reaction temperature (150˚C), preheating time (40 min) and residence time (10 min). The water insoluble solid recovery of Organosolv pretreatment with 1% sulfuric acid as a catalyst was the lowest and that of medium treatment plot was 44.81%. Exchangeable cations in SCBLF might be affected to increase pretreatment effect. The simultaneous saccharification and fermentation process was followed to determine the ethanol production of the pretreated biomass. The highest ethanol production yield based on initial weight was obtained from high treatment plotby Organosolv pretreatment with 1% sulfuric acid (16.11%). But regarding biomass production, medium treatment plot produced most, and bioethanol production was increased by 72.93% than control.
곽기섭(Ki-Seob Gwak),김호용(Ho-Yong Kim),유근옥(Keun-Ok Ryu),최형순(Hyung-Soon Choi),조도현(Do-Hyun Cho),김판기(Pan-Gi Kim),최인규(In-Gyu Choi) 한국산림바이오에너지학회 2009 산림바이오에너지 Vol.28 No.1
SCB (Slurry Composting and Biofiltration) 액비 처리에 의한 백합나무의 생장 증진 효과를 확인하기 위하여 무 처리구, 관수 처리구, SCB 액비 처리구로 시험구를 설정하여 상대생장량, 엽면적, 건중량, 엽록소 함량, 토양 및 백합나무 가지, 잎의 무기원소 함량을 각각 분석하였다. 무 처리구, 관수 처리구에 비해 SCB 액비 처리구에서 상대 생장량, 엽면적, 건중량, 엽록소 함량이 높게 나타났으며, 관수 처리구가 무 처리구보다 높은 경향을 보여준 결과로부터 SCB에 함유된 양료 성분과 수분 함량이 백합나무의 생장에 중요한 인자일 것이라고 사료되었다. 보다 정확한 원인을 구명하기 위해 토양 및 백합나무 가지, 잎의 무기원소 함량을 측정하였다. 토양과 백합나무 잎의 총 질소, 총인, 칼륨 함량이 세 처리구 중 SCB 액비 처리구에서 높게 나타났는데, 이는 SCB 액비 처리에 의해 토양 내의 질소, 인, 칼륨 함량이 증가하였고, 백합나무 뿌리를 통하여 잎까지 이동된 것을 의미한다. 질소, 인, 칼륨은 식물체의 주요 구성성분 및 대사 작용에 사용되기 때문에 SCB 액비 처리로 인하여 백합나무에 양료원소가 공급되어 생장이 증가한 것으로 사료되었다. 이들 결과는 바이오매스 생산의 증가를 의미하는 것이며, 백합나무의 바이오순환림 조성 시 효율적인 바이오매스 생산에 기여할 것으로 사료된다. To evaluate the growth improvement of Liriodendron tulipifera through SCB manure treatment, three experimental sectors of the control, water and SCB manure treatments were set up, and relative growth rate, leaf area, leaf dry weight, chlorophyll content, and inorganic contents of soil, twig and leaf were measured. Relative growth rate, leaf area and leaf dry weight on SCB manure treatment were higher than those on the control and water treatment. Based on the results of higher relative growth rate, leaf area and leaf dry weight on water treatment than those on the control, it seemed that nutrient and water contents in the soil were important factors for the growth of L. tulipifera. To investigate the factor for the tree growth, inorganic contents of soil, twig and leaf were analyzed. The N, P and K contents of soil and leaf on SCB manure treatment were the highest level among three experimental sectors. These results meant that the N, P and K contents of soil through SCB manure treatment increased, and these components were transported to the leaf through the root. As the N, P and K were main components of the plant, and important to tree metabolism actions, the beneficial components were supplied to L tulipifera by SCB manure treatment, and its growth was improved. This result suggested that the growth improvement of L tulipifera through SCB manure treatment caused the increase of biomass production, and might contribute to effective biomass production of L tulipifera forestation for bioenergy production.