• 한국산림과학회지
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• 제98권3호
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• pp.255-262
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• 2009

모래와 폐석토양에 SCB 액비를 처리한 후, 소나무와 다릅나무 종자의 발아특성 및 유묘의 생리적 활성 변화를 조사하였다. 모래와 폐석토양에 파종된 두 수종의 종자는 SCB액비 처리구에서 낮은 발아율과 발아속도를 나타냈으며, 평균발아일수도 증가하였다. 특히 SCB 원액이 처리된 소나무 종자들은 전혀 발아하지 않았다. 또한 소나무와 다릅나무의 유묘 생장은 SCB 처리구에서 뚜렷하게 감소하였으며, 두 수종의 엽내 엽록소 함량은 SCB 처리구에서 감소하였다. 소나무의 MDA 함량은 SCB 액비 처리로 감소하는 경향을 나타냈으나, 다릅나무의 MDA 함량은 SCB 액비 처리로 증가하였다. 소나무 잎의 항산화효소 활성은 SCB 처리구에서 일부 증가한 반면, 다릅나무 잎의 효소 활성은 SCB 원액과 3배 희석액 처리구서만 증가하였다. 결론적으로 SCB 액비는 소나무와 다릅나무 종자의 발아를 지연시키고, 심지어 유묘의 발생 및 생장을 저해시킬 수 있다. 이러한 효과는 SCB 액비 처리로 토양의 물리적 특성이 변하여 염류가 토양에 축적되면서 나타난 부작용으로 판단된다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2008년도 International Symposium on Remote Sensing
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• pp.332-335
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• 2008

Newly developing SAR (Synthetic Aperture Radar) sensors commonly include high resolution X-band those data are expected to contribute various applications. Recent few studies are presenting potential of X-band SAR data in forest related application. This study tried to investigate the relationship between forest stand parameters and multi-band SAR normalized backscattering. Multi-band SAR data was radiometric corrected to compare signal from different forest stand condition. Then correlation coefficients were estimated between attribute of forest stand map and normalized backscattering coefficients. Although overall correlation coefficients are not high, only X-band shows strong relationship with DBH class than other bands. The signal of C- and L-band is composed of a large number of discrete tree components such as leaves, stems, even background soil. In forest, strength of radar backscattering is affected by complex parameters. Further study might be considered more various forest stand parameters such as canopy density, stand height, volume, and biomass.

• 한국산림과학회지
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• 제100권4호
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• pp.715-721
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• 2011

본 연구는 시험림에 양돈분뇨를 처리하여 수목의 지상부 biomass 및 질소저장 능력을 구명하는데 그 목적이 있으며 공시수종은 8개의 포플러(Dorskamp, 72-30, 72-31, Bonghwa1, Eco28, 62-10, Suwon, 97-18) 및 버드나무 클론(131-27) 그리고 기타 4수종(Liriodendron tulipifera L., Metasequoia glyptostroboides Hu and W.C.Cheng, Quercus palustris $M{\ddot{u}}nchh.$, Acer okamotoanum Nakai)이다. 지상부 biomass 구성 비율은 줄기, 가지, 잎의 순으로 높게 나타났으며, 지상부 biomass의 부위별 질소함량은 잎, 가지, 줄기의 순으로 높게 나타났다. 지상부 biomass 생산량은 양돈분뇨 처리구의 모든 수종 및 클론들이 평균 ha당 30 ton, 무처리구가 ha당 16 ton으로 나타나 양돈분뇨 처리구가 높았으며 양돈분뇨 처리구에서 Dorskamp 클론의 지상부 biomass 생산량이 ha당 48.3 ton으로 가장 높았다. 수목의 질소저장 능력은 양돈분뇨 처리구의 모든 수종 및 클론들이 평균 ha당 159 kg, 무처리구가 ha당 90 kg으로 나타나 양돈분뇨를 처리한 수종들의 질소함량이 높게 나타났으며 Dorskamp 클론이 ha당 286.5 kg의 질소를 저장해 가장 높게 나타났다. 따라서 Dorskamp 클론이 양돈분뇨 처리에 적합한 클론으로 나타났지만 양돈분뇨에 대한 내성 및 피해 등에 관한 연구가 지속적으로 필요할 것으로 판단된다.

• The Korean Journal of Ecology
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• 제11권2호
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• pp.65-76
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• 1988

A number of laboratory and field experiments have performed with aqueous extracts from fresh leaves, fallen leaves and roots of Pinus rigida in order to investigae the effetct of the pine tree. The results obtained found its inhibitive effect on the germination and growth of tested species. Though relative germination ratio of the species was somewhat lower than the control plot, severe inhibition was observed in relative dry weight ration, These results were more obvious in aqueous extracts than in the case of leachates and similar results were also confirmed by field bioassays on the forest soil of P. rigida. Therefore, to find out the inhibitory sybstancesm 14 different kinds of KDICical substances were isolatd from the leaved of the tree by chromato-graphy and nist if them were confirmed to be phenoic compounds, The growth of lettuce was inhibition was observed in the concentration of less than 5X10-3M soluton. Phenolic compounds are assumed the substance related to the allelopathic effect of P. rigida.

• The Korean Journal of Ecology
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• 제15권1호
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• pp.19-33
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• 1992

The density, litterfall, phytomass, and primary productivity for 7 years in quercus mongolian forest locasted at mt. nambyengsan, pyeongchang-gun, gangwon provance in central part of korean peninsula were estimated quantitatively. at the first year in 1984, a stand had 1, 450 trees/ha in tree density, which was 0.67 of skewness and 0.54 of kurtosis in frequency distribution, however, at the 7th year in 1990, the stand had 1, 133 trees/ha in the density with 22%(or 316 tree/ha)in mortality, which was 1.16 of skewness and 1.89 of kurtosis in the frequency. annual mean litterfall was 5 ton DM/ha, which was composed of 68% of leaves, 17% of branches, 3% of bud scales, 9% of arcons and cups, 0.7% of flowers and others. the phytomass of tree layer for 7 years was gradually increased from 149.7 ton DM/ha at the first year to 188.5 ton DM/ha at the 7th year.annual net productivity for the tree layer studied ranged from 8.76 ton DM/ha.yr-1 to 11.62 ton DM/ha. yr-1 with heavy fluctuation year by year. average annual productivity of the stand of trunk, branches, leaves and roots for 7 years were 4.42, 0.67, 3.85 and 1.29 ton DM/ha.yr-1, respectively. turnover rate of the stand was 6.9% at the first year and 5.6% at the 7th year. such fluctuation of the productivity was caused by the chang of density, mortality, mortality and turnover rate.

• 농업생명과학연구
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• 제45권2호
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• pp.9-13
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• 2011

This study was carried out to control the disease of wood-cultivated ginseng(panax ginseng) using natural materials. Four fungi spices such as Pythium ultimum, Alternaria alternata, Fusarium oxysporum and Rhizoctonia solani which caused disease of the wood-cultivated ginseng were investigated. The infection of these fungi causes symptom on roots, stems and leaves. The leaves became dry and die. The disease caused by Pythium ultimum can be prevented by using friendly environmental materials like Chamaecyparis obtuse essential oil and Wormstop. Alternaria alternata and Fusarium oxysporum might be prevented by using wormstop extracted from Neem tree(Azadirachta indica). No substance tested effectively prevents the growth of Rhizoctonia solani.

• Applied Microscopy
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• 제43권3호
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• pp.110-116
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• 2013

Effects of elevated air temperature and carbon dioxide ($CO_2$) concentration on the leaf surface structures were investigated in Liriodendron tulipifera (yellow poplar) and Populus tomentiglandulosa (Suwon poplar). Cuttings of the two tree species were exposed to elevated air temperatures at $27/22^{\circ}C$ (day/night) and $CO_2$ concentrations at 770/790 ppm for three months. The abaxial leaf surface of yellow poplar under an ambient condition ($22/17^{\circ}C$ and 380/400 ppm) had stomata and epicuticular waxes (transversely ridged rodlets). A prominent increase in the density of epicuticular waxes was found on the leaves under the elevated condition. Meanwhile, the abaxial leaf surface of Suwon poplar under an ambient condition was covered with long trichomes. The leaves under the elevated condition possessed a higher amount of long trichomes than those under the ambient condition. These results suggest that the two poplar species may change their leaf surface structures under the elevated air temperature and $CO_2$ concentration condition for acclimation of increased photosynthesis.

• Journal of Forest and Environmental Science
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• 제34권1호
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• pp.57-60
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• 2018

Great cormorant (Phalacrocorax carbo) have been growing on a large scale since they settled on Jokja Island in Lake Paldang in 2010. In 2017, 827 breeding nests were found in Jokja Island and the breeding success rate was $2.60{\pm}0.23$ per nest. Nestling tree did not show any specificity for the species and was severely damaged. As the nesting materials for cormorants, branches and leaves, which were easy to come by around the island, were used. Most of their prey were fish in Lake Paldang. The population the great cormorants showed high breeding success rate, indicating that Jokja Island was a good site for breeding. Thus, it shows that continuous research for them needs to be done.

• Journal of Forest and Environmental Science
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• 제28권2호
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• pp.68-74
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• 2012

A total of 45 Pinus sylvestnis var. mongolica trees from 9 plots in northeast China were destructively sampled to develop aboveground prediction equations for inventory application. Sampling plots covered a range of stand ages (12-47-years-old) and densities (450-3,840/ha). The distribution of aboveground biomass of whole-trees and tree component (stems, branches and leaves) of individual trees were studied and 4 equations were developed as functions of diameter at breast height (DBH), total height (HT). All the equations have good estimation effect with high prediction precision over 90%. Forest biomass was estimated based on the individual biomass prediction equations. It was found forest biomass of all organs increased with the increasing of stand age and density. And the period of 45-50 years was the suitable harvest time for Pinus sylvesris plantation.

• 한국산림과학회지
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• 제37권1호
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• pp.31-34
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• 1978

은수원사시나무 1/1년생(年生), 1/2년생(年生) 및 7/8년생(年生)에 대(對)하여 간(幹)의 수액류속도(樹液流速度)을 관찰(觀察)하였던 바 유속(流速)은 수령간(樹令間)과 포지(圃地)의 토양수분(土壤水分)의 차이(借異)보다는 공중습도(空中濕度)와 착엽성(着葉性)에 가장 크게 영향을 받고 다음은 기온(氣溫)에 영향받고 있음을 볼 수 있었다.