• 한국약용작물학회지
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• 제21권5호
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• pp.394-400
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• 2013

This study was carried out in order to examine the germination characteristics of Atractylodes japonica seeds, and it was to develop the more efficient pre-treatment and production system of the seeds. Experiment was performed by two ways-temperature control (10, 15, 20, $25^{\circ}C$) and shading treatment (full sunlight, 35, 50, 75, 95% of full sunlight). Seed pre-treatment before the each experiment was carried out by temperature (with low temperature and wetting treatment (LTW) for 0, 15, 30, 45 and 60 days) and shading treatment (with drying at room temperature (DRT), drying at low temperature (DLT) and water soaking (WS) for 48 hours). Seeds of A. japonica were germinated well under temperature control (overall 85.3~100%), especially high temperature. And, the seeds pre-treated with LTW for 45 days germinated with a 100% success rate. Under the surveying shading treatment, the highest germination rate was 95.8% with DRT and overall 63.2~95.8%. Germination rate under seeds with WS was 63.2~7.8%. As a result of surveying the whole experiment, A. japonica seeds don't need to pre-treat cause of high germination, but if it is performed with LTW for a certain period of time, it would be more productive.

• 한국약용작물학회지
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• 제23권5호
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• pp.370-378
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• 2015

Background : Aruncus dioicus var. kamtschaticus, functional wild vegetable, is perennial herb and young leaves with soft texture are generally used as edible food. So the demand for the vegetable has increased recently. This study was carried out to determine the effects of temperature and shading on germination characteristics of A. dioicus. Methods and Results : The experiment was performed by temperature and shading treatments. Seed pre-treatment before the germination experiment was carried out by the storage in low temperature ($4^{\circ}C$) under wet condition (LTW) for 0, 15, 30, 45 and 60 days and shading treatment were 35%, 50%, and 75% under control, BA (6-benzyladenine) and $GA_3$ (gibberellic acid) condition for 24 hours. Increasing the length of the storage periods led to increases seed germination percent in low temperature ($4^{\circ}C$) under wet condition (LTW), germination rate of A. dioicus seed was the highest at $15^{\circ}C$ with 60 days of seed pre-treatment. In the case of seeds pre-treatment with LTW, the more temperature went up, the more days to 50% of Germination of Final Germination Rate ($T_{50}$) went down. As a result of surveying shading treatment, germination rate was the highest in control of 35% shading and the next higher was in control of 50% shading. Conclusions : It is concluded that the temperature and shading are important factors to produce A. dioicus. Also, We suggest these results as basic data of A. dioicus for sexual propagation.

• 농업생명과학연구
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• 제46권1호
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• pp.83-90
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• 2012

본 연구는 우산고로쇠나무의 적정 식재밀도와 식재시기를 결정하기 위해 자생지와 조림지의 생장특성을 분석하고 조림 시 수액채취 도달연수를 구명하기 위해 수행되었다. 토양은 자생지가 조림지에 비해 비옥한 것으로 나타났고 조림지의 생장특성을 분석해 본 결과 초기생장은 식재밀도에 영향을 받은 것으로 나타났다. 자생지와 조림지에서 흉고직경과 수관폭이 높은 상관관계를 나타내었다. 자생지의 흉고직경별 도달연수는 통계적으로 유의차가 없어 경급별 생장차이는 나타나지 않았다. 수액채취 가능 흉고직경 10 cm에 도달하는 연수는 자생지에서 약 19년, 조림지에서 약 9년으로 나타났다.

• 한국산림과학회지
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• 제98권2호
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• pp.133-141
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• 2009

This study was conducted to support for determining an efficient sampling design for forest resources assessments in South Korea with respect to statistical efficiency. For this objective, different systematic sampling designs were simulated and compared based on an artificial forest population that had been built from field sample data and satellite data in Yang-Pyeong County, Korea. Using the k-NN technique, two thematic maps (growing stock and forest cover type per pixel unit) across the test area were generated; field data (n=191) and Landsat ETM+ were used as source data. Four sampling designs (systematic sampling, systematic sampling for post-stratification, systematic cluster sampling, and stratified systematic sampling) were employed as optimum sampling design candidates. In order to compute error variance, the Monte Carlo simulation was used (k=1,000). Then, sampling error and relative efficiency were compared. When the objective of an inventory was to obtain estimations for the entire population, systematic cluster sampling was superior to the other sampling designs. If its objective is to obtain estimations for each sub-population, post-stratification gave a better estimation. In order to successfully perform this procedure, it requires clear definitions of strata of interest per field observation unit for efficient stratification.

• 한국산림과학회지
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• 제97권5호
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• pp.555-558
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• 2008

Trapping efficiency of various sex pheromone blends of the peach pyralid moth, Dichocrocis punctiferalis was compared by field study to develop monitoring system with its sex pheromone at chestnut orchards in Korea. Five candidates of the sex pheromone blends used for the field trapping of D. punctiferalis males were 70:30, 75:25, 80:20, 85:15 and 90:10 mixture of (E)-10-hexadecenyl aldehyde (E10-16:Al) and (Z)-10-hexadecenyl aldehyde (Z10-16:Al). All lures were treated with 1 or 2 mg of each blends. During 2 years of field survey, the 75:25 blend was usually the most effective in attracting males among 5 blends tested. For the 2nd generation, the best capturing activity for D. punctiferalis male was observed by lure with 75:25 blend. Both 90:10 and 75:25 blends showed highest efficiency for the 3rd generation. In most cases. lures treated with 1 mg of blend caught more male moths than these treated with 2 mg of blend.

• 한국산림과학회지
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• 제99권1호
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• pp.52-56
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• 2010

본 연구에서는 우리나라에서 수관화에 취약하다고 밝혀진 소나무림을 대상으로 수관층의 연료특성을 잎과 가지 굵기 별로 구분하여 수분함량, 연료밀도로 제시하고자 하였다. 이를 위해 대구 팔공산에서 소나무 10그루를 벌채하여 각 부위별로 건중량을 측정하였다. 분석결과 수관층 살아 있는 부위의 평균 수분함량은 53%, 죽은 부위는 15.3%였으며, 생엽의 수분함수율은 평균 56%이었다. 수관화 확산시 실제적으로 연소되는 잎과 직경 1 cm 이하의 가지를 합한 연료량은 전체 바이오매스에서는 16.2%, 수관층 바이오매스에서는 55%를 차지하였다. 수관 연료밀도는 평균 0.24 kg/$m^3$이었으며, 잎과 1 cm 굵기 이하의 가지를 합한 유효 수관연료밀도는 0.1325 kg/$m^3$이었다.

• 한국산림과학회지
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• 제99권6호
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• pp.802-807
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• 2010

본 연구에서는 퍼지선형계획법을 적용함으로써 국내의 장기목재공급 잠재력을 예측하고자 하였다. 생산계획 수립을 위한 수식모형을 구성하기 위하여 총 목재생산량의 극대를 목적함수로 설정하였으며, 제약조건으로는 벌채허용면적, 보속수확 등을 고려하였다. 선형계획법과 퍼지선형계획법의 비교 결과 목재생산량 및 입목축척의 관점에서 선형계획법이 퍼지 선형계획법 보다 높게 나타났다. 그러나, 선형계획법에서는 장기적인 관점에서 보속수확을 달성하지 못하는 것으로 나타나 보속성을 고려한 목재공급 잠재력을 예측하기 위해서는 퍼지선형계획법을 적용하는 것이 적합한 것으로 판단되었다. 연구결과 국내 연간 목재공급 잠재량은 약 10.5백만$m^3$으로 추정되었다. 각 지역별 연간 목재공급 잠재량은 경상북도가 가장 많고, 전라남도, 강원도, 그리고 경상남도 순으로 많게 나타났다.

• 한국산림과학회지
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• 제97권4호
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• pp.357-362
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• 2008

국내 산양삼과 인삼 종자의 형태적 형질과 안정성 동위원소를 비교하였다. 산양삼 10개 산지와 인삼 2개 산지에서 종자를 채집하여 종자의 길이, 폭, 두께, 그램당 립수를 측정하였으며, 탄소, 질소 안정성 동위원소비를 분석하였다. 산양삼 종자의 형태적 형질과 안정성 동위원소비는 지역간에 중복되는 변이를 나타냈다. 금산지역의 산양삼과 인삼을 비교한 결과, 산양삼 종자는 인삼과 비교하여 유의하게 크기가 작고 무게가 가벼웠으며, 질소 동위원소비는 산양삼 종자에서 낮았다. 유사한 지역 환경에서 산양삼과 인삼 종자는 형태적으로 구분할 수 있었고, 산양삼 종자의 질소 동위원소비는 경작 유형을 반영하였으나, 지역간 절대적 비교는 할 수 없었다.

• 한국환경복원기술학회지
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• 제11권3호
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• pp.20-27
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• 2008

This study was conducted to investigate the influence of thinning and pruning on characteristics of forest stand, mesopore ratio and soil water content at the Pinus koraiensis stands in Gwangneung, Gyeonggido. The Pinus koraiensis had been planted in 1976 and thinning and pruning were carried out in 1996. A sample area survey was conducted at experimental plots (thinned and unthinned) in 1998 and 2005, and mesopore ratio and soil water content have been monitored from 2000 to present. Average tree height of the thinned plot increased from 10.9m to 13.2m and from 10.3m to 12.8m for the unthinned plot. Average D.B.H of the thinned plot increased from 15.9cm to 21.1cm and from 14.5cm to 16.7cm for the unthinned plot during the period 1998-2005. Crown density at the thinned plot increased from 81.5% to 95.0% and from 89.5% to 95.0% for the unthinned plot during the period 1998-2005. Mesopore ratio (pF2.7) of A layer soil at the thinned plot was 40.1% while that of the unthinned plot was 37.3%. Changes of mesopore ratio at unthinned plot were not associated with stand age, but those at thinned plot had increased and then decreased, showing declining of the practice effect. Average soil water content at the thinned plot were 23.7% and 22.4% for the unthinned plot. Soil watercontents at both plots have been increased with increase in stand age. But the difference of soil watercontent at each plot has been decreased, especially at the depth of 10cm.

• 한국산림과학회지
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• 제104권1호
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• pp.133-139
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• 2015

현대사회에서 우리는 스트레스에 둘러싸여 자연과 단절된 삶을 살아가고 있으며 이는 여러 질환의 발병원인이 되고 있다. 또한 과거에 비하여 정신건강문제 경험자 수와 정신의료기관 입원환자의 수도 증가하였다. 이에 본 연구는 산림체험 프로그램이 정신과 입원환자의 기분상태와 우울 및 스트레스정도에 미치는 영향을 알아보기 위하여 수행하였다. 나주시 N병원의 정신과에 입원 중인 실험군 12명과 대조군 13명을 대상으로 2013년 5월 20일부터 29일까지 5회에 걸쳐 산림체험 프로그램이 실시되었으며, 기분상태 검사지(K-POMS-B)와 Beck 우울검사지(BDI) 및 타액을 활용하여 그 효과를 검증하였다. 연구결과, 산림체험 프로그램에 참여한 환자의 경우 우울상태가 호전되고 스트레스가 감소되었으며, 스트레스 감소효과는 통계적으로 유의하였다(p<0.01).