• Journal of Ecology and Environment
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• 제44권1호
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• pp.8-25
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• 2020

Background: Species of the genera Eucalyptus, Cupressus, and Pinus are the most widely planted tree species in the country in general and in Chilimo dry Afromontane forest in particular. Eucalyptus covers 90% of the total planted forest area in the country. However, only limited information exists in the country regarding aboveground biomass (AGB), belowground biomass (BGB), growth, and yield. This study was conducted to assess the variables on 25 and 30 years of age for three planted species: Cupressus lusitanica, Eucalyptus saligna, and Pinus patula in Chilimo plantation forest, in the Central Highlands of Ethiopia. A two-times inventory was conducted in 2012 and 2017. A total of nine square sampled plots of 400 ㎡ each, three plots under Cupressus lusitanica, 3 Eucalyptus saligna, and 3 Pinus patula were used for data collection. Data on height, diameter, soil, and tree stumps were collected. Percent C, % N, and bulk density was performed following chemical procedure. Results: The aboveground biomass ranged from 125.76 to 228.67 t C ha^-1 and the basal area and number of stems from 3.76 to 25.50 ㎡ ha^-1 and 483 to 1175 N ha^-1, respectively. The mean annual basal area and volume increment were between 0.97 and 1.20 ㎡ ha^-1 year^-1 and 10.79 and 16.22 ㎥ ha^-1 year^-1. Both carbon and nitrogen stock of the planted forest was non-significant among the tree species. Conclusion: The aboveground biomass, growth, and yield significantly varied among the species. Cupressus lusitanica had the highest aboveground biomass, volume, and basal area, while Eucalyptus saligna had the lowest value. To a depth of 1 m, total carbon stored ranged from 130.13 to 234.26 t C ha^-1. The total annual carbon sequestration potential was 12,575.18 t CO₂ eq. Eucalyptus has the highest carbon stock density and growth rate than other species.

• Journal of the Korean Wood Science and Technology
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• 제21권4호
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• pp.35-44
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• 1993

북가주에 있는 삼나무 수종에서 cadinane과 acorane류의 sesquiterpenoids를 chromatography를 사용하여 분리한 후, 화학적인 방법과 분광학적인 방법을 이용하여 분리된 성분의 화학구조를 규명하였다. 그 sesquiterpenoids의 생합성 경로를 정량적인 상관성에 의하여 밝혔다. 또한, 여러 삼나무 수종에 존재하는 sesquiterpenoids의 분류학적 차이에 대하여 논하였다.

• 한국환경복원기술학회지
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• 제11권2호
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• pp.28-39
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• 2008

This study was conducted to evaluate the rehabilitation measures and select appropriate tree species and rehabilitation methods for rehabilitating the rock desert areas in Guizhou, China. The study was carried out during the periods from 2003 to 2006 and results are as follows. Afforestation site is classified as a dolomite sandstone hilly country, a halfstony hilly country, a karst physiognomy, a rock desertification farmland and an latent rock desertification farmland by soil type and rock desertification status. Total afforestation area of Xuiwen is 1,300ha and afforestation area of a dolomite sandstone hilly country, a halfstony hilly country, a karst physiognomy, a rock desertification farmland and an latent rock desertification farmland are respectively 104.0ha (8.0%), 146.6ha (11.3%), 200.5ha (15.4%), 705.7ha (54.3%) and 143.2ha (11.0%). Planted tree species were selected by five site types. Robinia pseudoacacia, Chamaecyparis obtusa, Thuja orientalis, Cupressus duclouxiana and Juniperus chinensis L. var. chinensis were planted in a dolomite sandstone hilly country and Choerospondias axillaris and Robinia pseudoacacia were planted in a halfstony hilly country. Cupressus duclouxiana, Zanthoxylum bungeanum, Lonicera fulvotomentosa, Ilex kudincila, Quercus aliena, Quercus variabilis, Choerospondias axillaris, Koelreuteria bipinnata, Cryptomeria japonica, Cinnamomum camphora and Cinnamomum bodinieri were planted in a karst physiognomy. Cupressus duclouxiana, Toona sinensis, Robinia pseudoacacia, Lonicera fulvotomentosa, Eucommia ulmoides, Ilex kudincha. Zanthoxylum bungeanum and Magnolia officinalis were planted in a rock desertification farmland. Lonicera fulvotomentosa, Juglans sinensis, Pyrus pyrifolia, Choerospondias axillaris, Prunus salicina and Diospyros Kaki was planted in an latent rock desertification farm land. Robinia pseudoacacia showed high survival rate in 2004 and 2005, but Zanthoxylum bungeanum and Cinnamomum camphora showed slightly low survival rate in 2004. Survival rate of planting species in 2005 was over 80% because some species which showed low survival in 2004 were changed with other species and a proper afforestation method was applied. Growth rate of tree species was evaluated by height and diameter growth rate. Cupressus duclouxiana showed a highest height growth rate in 2004. Toona sil1ensis, Choerospondias axillaris, Koelreuteria bipinnata, and Cinnamomum camphora showed almost 100% height growth rate in 2005, although they showed a negative height growth rate in 2004. Robinia pseudoacacia showed a good growth rate in the rock desertification farmland and the halfstony hilly country so it could give a commercial benefit like honey as well as an afforestation effect.

• 한국산림과학회지
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• 제59권1호
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• pp.37-45
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• 1983

한국(韓國)에서 자생(自生)하는 목본식물(木本植物)의 외생균근(外生菌根)과 내생균근(內生菌根)의 분포(分布)를 조사(調査)하고 그 결과(結果)를 외국(外國)의 문헌(文獻)과 비교(比較)하였다. 경기도(京畿道) 광릉(光陵) 임업시험장(林業試驗場)에서 대부분의 뿌리 표본(表本)을 채취(採取)하였으며, 모두 32과(科), 63속(屬), 102종(種)을 관찰(觀察)하였다. 외생균근(外生菌根)은 소나무과(科)(Pinus, Larix, Picea, Abies), 버드나무과(科)(Populus, Salix), 자작나무과(科)(Alnus, Betula, Carpinus, Corylus), 참나무과(科)(Quercus, Castanea), 피나무과(科)(Tilia)의 13속(屬)에서 관찰(觀察)되었으며, 내생균근(內生菌根)은 위의 13속중(屬中) Populus와 나머지 49속(屬)에서 관찰(觀察)되었다. 외생(外生)이나 내생균근(內生菌根)을 전혀 가지지 않은 속(屬)은 Rhus뿐이었으나, 이 속(屬)은 좀더 자제한 관찰(觀察)을 요(要)한다. 외생(外生)과 내생(內生)을 함께 가지고 있는 속(屬)은 Populus 뿐이었으나, 외국문헌(外國文獻)에는 그밖에도 Juniperus, Cupressus, Populus, Salix, Juglans, Alnus, Ulmus, Malus, Pyrus, Tilia 등이 수록(收錄)되어 있다. 우발적(偶發的)으로 외생균근(外生菌根)을 형성(形成)한다고 하는 Juniperus, Ulmus, Pyrus, Acer 등에서는 외생균근(外生菌根)을 관찰(觀察)할 수 없었다. 몇 수종(樹種)의 내생균근(內生菌根)의 형태학적(形態學的) 특성(特性)을 현미경(顯微鏡) 사진(寫眞)과 함께 설명(說明)하였다.

• 한국환경복원기술학회지
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• 제14권2호
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• pp.47-57
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• 2011

This study monitored forest plant species vulnerable to climate change in Jiri Mountain, one of Korea's representative alpine regions, in order to securely preserve plant genetic resources susceptible to climate change and to utilize the results as basic data for bioclimatology prediction and management on a long-term basis. A majority of indicator plants tended to blossom one week to one month later in 2010 than in 2009. As with the blooming dates, the falling dates of blossoms became later in most species, with the exception for Weigela florida and Oplopanax elatus. Leaf bursting as well fell on later dates in a majority of species excluding Carpinus laxiflora and Cupressus sempervirens, displaying the most obvious differences among the data of analysis of the 2009-2010 physiological cycle changes. It is believed that was due to the fact that temperatures in February, March and April, which affect plants' blossoming and leaf bursting, were lower in 2010 than in 2009 and that cold temperatures in the winter lasted for a longer period in 2010 than in 2009. The dates of leaves being changed to red were similar in 2009 and 2010 by being or later or earlier by several weeks in 2010 than in 2009 without any regularity. Most species' leaves began to fall at similar dates in 2009 and 2010 or at later dates by one to two weeks in 2010 than in 2009. The temperature differences in late 2009 and late 2010 were not so large, resulting in similar dates of falling leaves, and gaps in several indicator plants' physiological cycles without any regularity can be attributed to each individual plant's physiological and environmental characteristics.

• 농업생명과학연구
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• 제45권6호
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• pp.213-226
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• 2011

아세틸콜린 분해효소(acetylcholine esterase, AChE) 억제제는 아세틸콜린 함량을 높여 콜린성 neuron을 활성화함으로써 기억 능력의 개선 및 치매 개선을 가져와 현재 다양한 AChE 억제제들이 개발되어 사용되고 있다. 본 연구에서는 AChE에 대한 억제 활성을 갖는 천연물을 다양한 식물추출물 및 에센스오일로부터 탐색하였으며, 탐색한 추출물의 scopolamine으로 기억손상을 유발한 쥐의 기억력 개선 활성을 치매 치료제로 사용하고 있는 donepizil과 비교 분석하였다. 그 결과 자몽(Citrus paradisi) 유래의 에센스 오일이 AChE 억제 활성이 가장 높아 20 ug/ml의 농도로 처리하였을 때 90% 이상의 효소 억제 활성을 나타내었다. 수동회피 실험 결과, 자몽 유래의 에센스오일(100 mg/kg, p.o.)을 투여한 쥐는 치매 치료제로 사용하고 있는 donepizile (0.5 mg/kg)을 투여한 쥐와 유사한 latency time을 나타내어 인지기능이 개선되었다. 또한, 수중미로 시험 결과, 자몽 유래 에센스오일(100 mg/Kg, p.o.)을 투여한 쥐는 donepizile(0.5 mg/kg)을 투여한 쥐와 유사한 latency time을 나타내어 인지기능이 개선되었다. 이상의 결과로부터 자몽 유래 에센스오일은 매우 효과적으로 기억력을 개선하여 인지기능을 개선해 줄 수 있는 안전하고 효과적인 후보물질이라고 사료된다.