로지스틱 회귀모형을 이용한 상록활엽수림 생육분포 확률 평가

유병오 ( Byung Oh Yoo ),박준형 ( Joon Hyung Park ),박용배 ( Yong Bae Park ),정수영 ( Su Young Jung ),이광수 ( Kwang Soo Lee ) 한국지리정보학회 2016 한국지리정보학회지 Vol.19 No.1

This study was carried out to assess the distributional probability for Evergreen Broad -Leaved Forests(EBLFs) using the field data and digital climate data that were occurred during the period of 1980 to 2010. For the validation of logistic regression model, the probabilistic value ranged from 33 to 84%, especially the probabilistic value of growing distribution becomes lower patterns with higher altitude. In addition, it has been estimated that the probabilistic value of growing distribution is the highest with 63∼83% among the regional units in temperate/warm-temperate forests.

남부지역 도시녹지의 난대상록활엽수 동해피해 특성

정수영 ( Su Young Jung ),이광수 ( Kwang Soo Lee ),유병오 ( Byung Oh Yoo ),박용배 ( Yong Bae Park ),주남규 ( Nam Gyu Ju ),김형호 ( Hyung Ho Kim ),박준형 ( Joon Hyung Park ) 한국산림과학회 2014 한국산림과학회지 Vol.103 No.4

The aim of this study was to investigate the damage characteristics induced by winter freezing ofevergreen broad-leaved trees distributed in urban area of warm temperate forest zone, which are gainingincreased interest recently as climate change. The results of the study indicated that, as for ‘stem injury’,Camellia japonica Linne (59.6%) had the weakest damage, while Ternstroemia gymnanthera Sprague (83.3%)had the most severe damage. By the visual evaluation of freezing injury according to the characteristics ofplantations environment, the observations of single planting (p<0.01) in planting method had weaker damagethan those of group planting, the observations of under tree (p<0.001), plain (p<0.001), and organic matterplenty (p<0.05) in plantations characteristics had significant differences with relatively weaker damage than theobservations of open space, slop, and scarcity, respectively. Tree height (-0.432) and crown width (-0.470)among growth factors were negatively correlated with the severity of damage, respectively. Therefore, theselection of tree species is vital for the successful creation of these urban forested area by making considerationsof planting environment, and further research on evergreen broad-leaved trees is needed in this aspect.

소나무 임분밀도관리도 작성 및 실용성 검정

박준형 ( Joon Hyung Park ),이광수 ( Kwang Soo Lee ),유병오 ( Byung Oh Yoo ),박용배 ( Yong Bae Park ),정수영 ( Su Young Jung ) 한국산림과학회 2016 한국산림과학회지 Vol.105 No.3

This study aims to make the stand density management diagram which is very useful for establishing systematic management plan and obtaining management goal in Pinus densiflora forest. To estimate 5 models mainly composed of stand density management diagram, we used total of 1,886 sample plots having more than 75% of the total basal area of the pine trees in each stand. To test the goodness of fit, X² was computed with a significance level of 5%, and the acceptable error range as 20%. Also standard deviation of the model was 34.59 m³ㆍha^-1, minimum acceptable error range was 16.59% and coefficient of variation was 22.11%. If we use the stand density management diagram, it would be useful to establish the timber yield and thinning plan understanding the pathway of stand density management.

임분밀도관리도를 이용한 편백림의 고사량 및 수확량 예측

박준형 ( Joon Hyung Park ),유병오 ( Byung Oh Yoo ),이광수 ( Kwang Soo Lee ),박용배 ( Yong Bae Park ),김형호 ( Hyung-ho Kim ),정수영 ( Su Young Jung ) 한국산림과학회 2018 한국산림과학회지 Vol.107 No.2

This study aims to make the stand density management diagram which is useful for establishing stand density management system in Chamaecyparis obtusa forest. By using 216 sample plots to estimate Yield-Density relationship (R²=0.743), the stand density management diagram was modeled by the estimated parameters. As a result of this diagram, after planting 3,000 trees per hectare the mortality rate of this unthinned C. obtusa stands over 80 years was estimated to be equal to 12.0~18.1 treesㆍha^-1ㆍyear^-1, and stand volume was 463.1~695.4 m³ㆍha^-1, and stand density was 1,555~2,038 treesㆍha^-1. Developed stand density management diagram for C. obtusa is effective to establish the management criteria and production objective. Therefore, this study allowed us to make the optimal forest working plan.

우리나라 소나무림의 수고-흉고직경 생장에 따른 지역형 분류

박준형 ( Joon Hyung Park ),정수영 ( Su Young Jung ),이광수 ( Kwang Soo Lee ),김창환 ( Chang Hwan Kim ),박용배 ( Yong Bae Park ),유병오 ( Byung Oh Yoo ) 한국산림과학회 2016 한국산림과학회지 Vol.105 No.3

The object of this study was to classify the local types in relation to regional differences using Height-DBH growth of Pinus densiflora in Korea. The regional types were clustered according to Getis-Ord’s Gi among Local indicators of spatial association (LISA) by characteristics of spatial distribution which were calculated the residual of sample plots by fitting Height-DBH growth model using Weibull growth equation. Accordingly, Pinus densiflora were classified 3 groups, It indicated that annual precipitation had one of the biggest impacts among the considered site and climate factors. This results can become the standard for regional management of Pinus densiflora forests.

◇ 1분과 : 붉가시나무림의 솎아베기 강도에 따른 생장 반응 효과

정수영 ( Su Young Jung ),주남규 ( Nam Gyu Ju ),이광수 ( Kwang Soo Lee ),유병오 ( Byung Oh Yoo ),박용배 ( Yong Bae Park ),유석봉 ( Seok Bong Yoo ),박준형 ( Joon Hyung Park ) 한국산림과학회 2015 한국산림과학회지 Vol.104 No.4

This study was examined for the growth response of tree diameter and volume to thinning treatments from different thinning intensities using three long-term thinning trials for Japanese Evergreen Oak (Quercus acuta Thunb.) stands in Wando island, Korea. After thinning in 1999, annual tree growth of diameter and volume was highest in heavy thinned stands for individual tree and this growth pattern of thinning response showed similar tendency to the individual tree growth response in light thinned stands. By increasing diameter growth, the value of H/D ratio (HDR) as an indicator of stem form was properly decreased and improved up to 80%. Although there is significant growth response of basal area in both heavily and lightly thinned stands, the growth potential both of heavily and lightly thinned stands in total stand volume is not likely to reach at the level of unthinned stands because of basal area growth loss associated with both light and heavy thinnings.

남부지역 졸참나무의 임분 특성에 따른 물리,역학적 특성

원경록 ( Kyung Rok Won ),홍남의 ( Nam Euy Hong ),이광수 ( Kwang Soo Lee ),정수영 ( Soo Yung Jung ),유병오 ( Byung Oh Yoo ),박용배 ( Young Bae Park ),정성호 ( Song Ho Chong ),변희섭 ( Hee Seop Byeon ) 한국목재공학회 2014 목재공학 Vol.42 No.6

Wood properties are affected by environmental factors such as soil and climate change. There were close relationships between mechanical properties and stand characteristics for Quercus serrata stands in Gyeongsangnam-doProvince, Jeollanam-do Province and Je-ju island. Both compression and shear strengths of woods showed a negative correlation with diameter at breast height (DBH) and the number of tree per hector, while they are positively related with with tree age, altitude, and drainage. The annual ring width was also negatively correlated with tree age, altitude, drainage, DBH, and tree height. However, anatomical characteristics of wood did not show much variation depending on the provincial regions. These results brought a conclusion that Quercus serrata in southern region could be usefulforest resources for the utilization of wood.

소나무재선충병 발생 곰솔임분의 간벌에 따른 토양 호흡 동태

최은진 ( Eun Jin Choi ),서희영 ( Hui Yeong Seo ),이광수 ( Kwang Soo Lee ),유병오 ( Byung Oh Yoo ),김춘식 ( Choon Sig Kim ),조현서 ( Hyun Seo Cho ) 한국산림과학회 2016 한국산림과학회지 Vol.105 No.1

This study was carried out to investigate the change on soil CO2 efflux rates, soil temperature, soil water content and soil pH by thinning intensity treatments (heavy thinning, light thinning, control) of a black pine (Pinus thunbergii Parl.) stand disturbed by pine wilt disease in Wola National Experimental Forests in Jinju, Gyeongnam province. Monthly variations of soil CO2 efflux rates were not significantly different between the thinning and the control treatments (P>0.05). The annual mean soil CO2 efflux rates were 0.58 g CO2 m.2 h.1 for the light thinning, 0.49 g CO2 m.2 h.1 for the heavy thinning and 0.45 g CO2 m.2 h.1 for the control treatments, respectively. There was a significant exponential relation between soil CO2 efflux rates and soil temperature, but no correlation between soil water content or soil pH and soil CO2 efflux rates. The values of Q10 were 3.40 for the light thinning, 3.20 for the heavy thinning and 3.06 for the control treatments, respectively. The results indicate that soil CO2 efflux rates in a black pine stand disturbed by pine wilt disease could be affected by thinning treatments.

종가시나무 조림지의 임분밀도에 따른 임목 바이오매스 및 양분축적량

최봉준 ( Bong-jun Choi ),백경원 ( Gyeongwon Baek ),조창규 ( Chang-gyu Jo ),박성완 ( Seong-wan Park ),유병오 ( Byung Oh Yoo ),정수영 ( Su-young Jeong ),이광수 ( Kwang Soo Lee ),김춘식 ( Choonsig Kim ) 한국산림과학회 2016 한국산림과학회지 Vol.105 No.3

This study was conducted to evaluate aboveground tree biomass and nutrient (C, N, P, K, Ca, and Mg) response of tree components by high (1,933 trees ha^-1) and low (1,200 tree ha^-1) stand densities in a 27- year-old Quercus glauca plantation. The study site was located in Goseong county, Gyeongsangnam-do, southern Korea. Total 12 trees (6 high and 6 low stand densities) were cut to develop allometric equations and to measure nutrient concentration of tree components. Stand density-specific allometric equations in the high and low stand densities were significant (P < 0.05) in tree components with diameter at breast height (DBH). Also, generalized allometric equations could be applied to estimate tree biomass regardless of the difference of stand density because of no significant effect on slope of stand density-specific allometric equations. Aboveground tree biomass estimated by the allometric equations was significantly higher in the high stand density (177 Mg ha^-1) than in the low stand density (114 Mg ha^-1). However, nutrient concentration of tree components was not significantly affected by the difference of stand density. Nutrient stocks in tree components were not significantly between the high stand density and the low stand density, except for the N and P stocks of stem wood. These results indicate that aboveground tree biomass could be significantly affected by stand density, but nutrient concentration among the tree components was not affected by the difference of stand density in a Quercus glauca plantation.

남부권역 삼나무림의 지위지수 추정 및 적지 평가

김영 ( Yeung Kim ),김민희 ( Jong Yeong Kim ),진승현 ( Seung Hyun Jin ),유병오 ( Ki Wan An ),이광수 ( Byung Oh Yoo ),김종영 ( Kwang Soo Lee ),안기완 ( Min Hee Kim ),안영상 ( Young Sang Ahn ) 한국임학회 2014 산림과학 공동학술대회 논문집 Vol.2014 No.-

본 연구는 환경인자를 이용하여 남부권역(전라북도, 전라남도, 광주광역시, 경상남도, 부산광역시, 울산광역시 및 제주특별자치도)의 주수종인 삼나무의 지위지수 추정식을 개발하고 적지면적을 추정하여 기후변화에 대비한 새로운 산림자원모델을 개발하고자 수행하였다. 이에 산림입지도와 자동기상측정장치(AWS)를 이용하여 626개소 삼나무 표준지에 대한 67개의 환경인자를 도출하여 최적의 지위지수 추정식을 조제하였다. 추정식에는 8개의 환경인자(A층 토색, B층 토색, 3월 평균기온, 능선대계곡비, 모암, 8월 평균기온, 해발고도, B층 토심)가 독립변수로 사용되었으며 결졍계수는 0.466으로 분석되었다. 지위지수는 12부터 18까지 분포하였으며, 남부권역의 현존 삼나무 임분 중 지위지수 중(16)이상인 적합성 비율은 20.1%로 나타났고 면적은 225,263.8ha로 산출되었다. 주로 내륙의 해발 600m 이하인 계곡부 또는 풍노출도가 낮은 곳이 적지인 것으로 나타났으며 전라북도의 변산반도, 임실, 정읍, 순창, 전라남도의 담양, 곡성, 화순, 영암, 경상남도의 함양, 산청, 합천, 제주도의 한라산 동사면 및 남사면의 산복 지역이 이에 해당되는 것으로 조사되었다. This study was conducted to develop new forest resources model for Climate change. For this, it was performed to develop site index equations and estimate productive areas for Cryptomeria japonica of major species in the Southern area using environmental factors. The 67 environmental factors about Cryptomeria japonica, 626 sites were obtained form a Forest Site Digital Map and Automatic Weather System(AWS). It was regressed on site index equations. Eight environmental factors(A horizon soil color, B horizon soil color, March mean temperature, ridge-valley rate, country rock, August mean temperature, altitude above sea level, B horizon soil depth) were selected as independent variables, the result showed that the coefficients of determination were 0.466. The site index was ranged from 12 to 18. Compliance ratio about the site index more than 16 was showed 20.1%, and the area was calculated 225,263.8ha. Right land was valley about 600m below sea level in inland or area of low wind exposure.