• 한국토양비료학회지
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• 제19권3호
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• pp.239-244
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• 1986

제주도(濟州道) 및 경기도(京畿道)를 제외(除外)한 전국농토배양답(全國農土培養畓)에서 비교적(比較的) 작물생산력이 높은 보통답토양(普通畓土壤) 7점(點)과 작물생산력이 낮은 사질답토양(砂質畓土壤) 7점(點)을 채취(採取)하여 부식(腐植)의 성상(性狀)과 질소(窒素)의 형태(型態)를 조사(調査), 비교(比較)한 결과(結果)는 다음과 같다. 1. 공시토양(供試土壤)의 Humus(Humic acid+Fulvic acid)의 양(量)은 665mg/100g 2680mg/100g의 수준(水準)이었으며, Humic acid는 보통답(普通畓) 평균치(平均値)가 1436mg/100g, 사질답(砂質畓) 평균치(平均値)는 970mg/100g이었다. 2. 웅전법(熊田法)에 의(依)한 부식산(腐植酸)이 분류형(分類型)은 B형(型), P형(型), RP형(型)에 분포(分布)되어 있었다. 3. 공시토양(供試土壤)의 무기태질소함량(無機態窒素含量)은 전질소함량(全窒素含量)의 1.04-2.86%였으며 사질답(砂質畓) 평균치(平均値)와 보통답(普通畓) 평균치(平均値)는 각각(各各) 1.72%, 1.75%였다. 4. 산가수분해(酸加水分解)에 의(依)한 유기태질소분별정량(有機態窒素分別定量) 결과(結果) 보통답(普通畓), 사질답토양(砂質畓土壤) 공(共)이 Amino산태질소(酸態窒素)가 가장 많았으며 사질답토양(砂質畓土壤)에서는 Amino산태질소(酸態窒素)가 31.52%, Humin태질소(態窒素) 20.63% Amino당태질소(糖態窒素)는 18.70%였다.

• 환경영향평가
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• 제4권2호
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• pp.71-91
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• 1995

In order to develop an appropriate set of criteria applicable for environmental impact assessment (EIA) of natural forest 8 items are proposed. The criteria are vegetation distribution area (DA), distribution pattern (DP), size (S), diameter of breast height of tree (DBH), humus (H), sustainment (ST), successional stage (SS) and impact of adjacent ecosystem (IAE), Each criterion has an interval which minimum 1 score to maximum 5 score Forest Evaluation Index (FEI) was obtained as the sum of 8 criteria value. Above 70% is considered to be absolutely conservative and from 50% to 70% range of total score is to be considered conservative. In the case of the Sancho˘ng Pumping-up Power Plant of Mt. Chiri, 8 criteria were applied base on actual vegetation map. Pinus densiflora community got 73%(29 scores) and Quercus variabilis - Q. serrata community got 60%(24 scores). This may be said that this local vegetation has high ecological potentiality. These criteria cannot always be absolutely evaluation tool. So it is expected to take the more time to be developed further, and holistically added by the other field such as fauna, geological feature etc.

• 한국조경학회지
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• 제15권2호
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• pp.67-78
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• 1987

This study was executed to measure the user\`s impact natural environment in National Park Campsite. Therefore, we choose Mt. Chiak National Park and the campsite in the district of Temple Ku-Ryong as a model of analysis, which is made by ecological approach, the number of the user has influence on the environment near the campsite. The result are as follows : 1. The more the number of users becomes, the more Na, Ca, Mg ion concentration and pH in the soil increase and the less K ion becomes. 2. Litter and humus depth, litter coverage, herb coverage, soil hardness, the surface of the ground layer and tree species numbers, density and coverage of lower layer shows a sensitive reaction to the number of the users. 3. The research shows that the tolerant trees against campsite impact are Lespedeza maximowiczii, Zanthoxylum schinifolium Staphylea bumalda, Smilax sieboldii, Quercus aliena, Euonymus oxyphyllus, Weigela subsessilis and Securinega suffruticosa, and the sensitive trees are Stephanandra incisa, Rubus trichocarpa, Rubus crataegifolius, Rhododendron mucronulatum, Styrax obassia, Acer palmatum, Lindera obtusiloba, Rhododendron suhlippenbachii, Rhus japonica and Callicarpa japonica. 4. The high density of the users made the simplication of a vegetation structure. So, as the number of the user increase the species showed severe heterogeniety between the heavy-use and nonuse site. 5. As considering the landscape management about campsite and surrounding area on the way of analysis of national landscape aspect and succession sere according to ecological aspect, it may be desirable that Pinus densiflora forest be conserved as Pinus densiflora landscape and mixed forest produce natural scenery with succession sere.

• 한국조경학회지
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• 제19권3호
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• pp.41-54
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• 1991

This study was executed to analyze the vegetational landscape structure and administration planning of Younguan Royal Tomb forest by the classification and DCA ordination were applied to the study are in order to classify them into several groups based on environmental variables. Also Younguan Royal Tomb forest comparison of a pair of photographs taken in 1920s and 1990. Sixteen sites were sampled with clumped sampling method in september 1990 and five quadrats were examined in each site. By classification and DCA, the plant community were divided into two groups(A. japonica community, P. densiflora, Quercus acutissima community) by the humus. Pinus densiflora community of actual vegetion covered 15.9%, Alnus japonica 6.5% and Quercus community 65.6% of the total area. And the afforested vegetation of P. koraiensis. P. rigida and Juglans mandshurica covered 13.2%. DCA ordination showed that successional trends of tree species seem to be from P. densiflora, Q. aliena to Q. acutissima in P. densiflora community and from A. japonica community of the upper layer. By the comparison of couple photographs between 1920s and 1990 we can recognize the change of historical landscape composed of P. densiflora community, A. japonaca and those community shall be conserved by the disclimax method, i.e. the broadleaf vegetation in the underlayer in the P. densiflora community should be cleared out. Otherwise the vegetational landscape sructure in Younguan Royal Tomb is successed to progress succession to Q. acutissima landscape.

• 공업화학
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• 제16권1호
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• pp.21-27
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• 2005

In order to conduct research on oil originated in Mongolia for further application of petroleum not only as fuel but also as raw material for organic synthesis, we need to study the physical, chemical characteristics and individual, group hydrocarbon's compositions of main petroleum fractions. A number of studies and surveys on the physical and chemical characteristics, group hydrocarbon's composition of petroleum deposits in Zuun-Bayan, Sukhaibulag, Tsagaan Elst, Tamsagbulag have been carried out earlier through n-g-M, aniline point and dispersimetric methods successfully. Yet a detailed chromatographical and NMR spectroscopic study for the individual hydrocarbon's composition of Tamsagbulag oil main fractions has not been conducted. In the present study the results of GC analyses of gasoline fractions of wells 19-3, 19-13 and 19-10, Tamsagbulag (Eastern Mongolia) were presence. The gasoline fractions of given wells were characterized by the high concentration of paraffins and presence of trace amount of olefins. There were identified 69 paraffins, 45 naphthenes, 41 aromatics and 3 olefins in total 158 individual hydrocarbons from each samples of gasoline fraction. The first attempts to classify Tamsagbulag oil under the individual hydrocarbon's composition data were successfully conducted and the supposition of a genetic classification of given oil as "sapropelic" type was made.

• The Korean Journal of Ecology
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• 제11권2호
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• pp.55-64
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• 1988

The seasonal pattern of pool size and withdrawal from senescing or stroage organ, and the annual magintude of internal-and plant-soil cycles for nitrogen and phosphorus in a Glyceria leptolepis Ohwi population in a marsh of the Mt. Geumoh were investigared. The population pool changed from initial size of 6.8 to the maximum of 16.1gN$m^{-2}$ for N and from 1.7 to 3.9g Pm$m^{-2}$ for P, maintaining far higher relative pool size during the first half of the growth period as compared with that for biomass. A sharp increase in N and P pool was noticed in early spring before the biomass growth was recognized, The major process supplying the demand for N and P changed as the growth progressed showing the order; absorption-withdrwal-absorption-with-drawal. The annual magnitude of plant-soil cycle for N and P was 18.0-19.1 and 2.9-3.3gm$m^{-2}$, accounting for 3 and 5% of each nutrient pool in 0-20 cm humus layer, respectively. The higher exent of internal cycle and the lower rate of annual turnover for P(1.08) as compared with those for N may suggest that this population conserves and reuses P more efficiently than N.

• 한국환경농학회지
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• 제25권2호
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• pp.170-173
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• 2006

우리나라에서 생산되는 양이 가장 많은 계분부숙퇴비를 벤자민 고무나무에 시용하여 게분부숙퇴비의 사용처와 고무나무의 생육과 품질을 향상 시킬 수 있는 방법을 알아 내기 위하여 시험을 수행한 결과를 보고하고자 한다. 1. 벤자민 고무나무의 생육은 계분 부숙퇴비의 시용량 10%일때 가장 좋았다. 2. 벤자민 고무나무의 양분흡수량은 정식후 일수 가 증가함에 따라 많아 지었는데 성분별로 검토하여 보면 질소 > 칼리 > 석회 > 인산 > 마그네슘의 순으로 많았다. 3. 계분부숙퇴비의 시용량에 따른 양분의 흡수량을 살펴보면 계부숙퇴비 10% 해당량 시용이 가장 많았다. 4. 계분부숙퇴비 시용량이 증가할수록 계분부숙퇴비의 뿌리 발육특성 계분부숙퇴비 10% 해당량 시용이 가장 좋았다.

• 한국환경복원기술학회지
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• 제3권4호
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• pp.11-21
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• 2000

This study was aimed to establish different drainage types of soil media on the plant growing in rooftop. For this study, experiment plots were installed on the roof of Social Science building, Chongju University, from April, 1998 to September, 1999. (1) Sand and sandy loam as base and check soils, (2) vermiculite as a inorganic soil media (3) "humus sawdust" and "burned rice hull" as organic soil media were used by various mixing ratio Zoysia japonica, was selected for the experiment. The results of this study are as follows : L5B3S2 and L5H3S2 of bad drainage character with a plastic drainage plate combination caused good growth effect on Zoysia japonica examined in 3 types of drainage layer with 5 types of soil media. From this result, it could be suggested that combined design of plastic drainage plate with 2 soil types - L5B3S2 and L5H3S2 - be desirable composition for regarding weight load and plant growth.

• 한국응용곤충학회지
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• 제44권2호
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• pp.139-144
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• 2005

우리나라에서 약용으로 가장 많이 활용되고 있는 흰점박이꽃무지의 형태와 생육특성에 관하여 조사하였다. 성충은 야외에서 7월 상순 하순부터 출현하였으며 출현빈도가 가장 높은 시기는 8월 상순이었다. 또한 소수의 개체는 성충으로 월동하였다. 유충은 부엽토속에서 서식하며 11월까지는 모두 3령이 되어 월동하였다. 실내에서 암컷 1마리당 평균 152개를 산란하였고, $25^{\circ}C$와 $30^{\circ}C$에서 사육한 결과 알, 유충, 번데기 기간은 모두 높은 온도에서 발육기간이 짧았다. 성충수명은 암컷이 수컷보다 길었고, 집단사육 시보다는 개별사육 시 길었고, 높은 온도보다는 낮은 온도에서 길었다.

• 한국응용곤충학회지
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• 제44권3호
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• pp.207-212
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• 2005

우리나라에서 서식하는 풍뎅이류 중에서 가장 큰 장수풍뎅이의 형태와 생육특성에 관하여 조사하였다. 성충은 야외에서 6월 하순부터 8월 하순까지 출현하며, 출현빈도가 가장 높은 시기는 7월 중순이고, 1년에 1회 발생하였다. 유충은 부엽토속에서 서식하며, 10월 하순까지는 모두 3령이 되어 월동하였다. 실내에서 암컷 1마리당 평균 24개를 산란하였고, $25^{\circ}C$와 $30^{\circ}C$에서 사육한 결과 알, 유충, 번데기 기간은 모두 높은 온도에서 짧았다. 성충의 수명은 암컷이, 집단사육 시 보다는 개별사육시에, 생육온도는 낮은 온도에서 더 길었다.