冠岳樹木園地域內 荒廢山地土壤의 肥沃化를 통한 綠化促進에 關한 硏究

李宗學,麻鎬燮,李憲浩,權台鎬,禹保命 서울大學校 農科大學 1984 서울대농학연구지 Vol.9 No.2

冠岳樹木園地域의 山復斜面은 地質的으로 대보화강암에서 풍화생성된 거친 돌부수러기가 많은 粗砂質壤土로 구성되었으므로 表土層의 土壤流矢이 심하여 土深이 대단히 얕거나 岩盤露出이 심하여 林木生長이 심히 不良한 地帶로서, 山地의 地力恢復 및 現存하는 散生樹木의 生長力恢復을 通한 山地綠化保全이 시급히 요청되고 있다. 이와같은 요청에 부응하여 荒廢地斜面에 自生하고 있는 주요한 4樹種(소나무, 리기다소나무, 노간주나무, 철쭉)에 대하여 山地施肥效果 試驗을 春期와 秋期로 나누어 실시한 결과 樹高 및 直徑生長量에 있어서 無施肥區에 比하여 현저한 施肥效果가 인정되었다. 따라서 冠岳山地帶의 荒廢地를 조속히 復舊綠化하기 위해서는 砂防土木的 工事方法 및 砂方造林的 播植方法이외에도 현존 수목의 保全 및 生長力恢復을 통한 速成綠化方法도 채용되어야 할 것이다. Hillsides in the Kwanak arboretum area were composed mainly of coarse sandy loam having relatively high proportion of rough weathered debris derived from the Daebo granite geologically. Owing to heavy soil erosion resulted to shallow soil depth and heavy rock exposures, the growing trees in this type of surface soil are very poor in their growth. For woody plant vegetation establishment in this montain area, it is urgent to recover the fertility of soil and the growth of existing trees. For this purpose, in spring and autumn season in 1983~84 the fertilization experiment was conducted with the 4 principal native species(Pinus densifltora, Pinus rigida, Juniperus rigida, Rhododendron schlippenbachii) growing in this denuded forest land, and the effects of fertilized tree plots were more prominent than the control plot in both height and root-collar diameter growth. Therefore, the accelerating measures of vegetation rehabilitation through conservation of existing trees and recovery of tree growth by forest fertilization practices, besides forest engineering measur es and soil erosion control afforestation measures, could be acceptable as the measures for the recovery of denuded forest land in Mt. Kwanak area.

冠岳樹木園地域內 荒廢山地土壤의 肥沃化를 통한 綠化促進에 關한 硏究

李宗學,麻鎬燮,權台鎬,李憲浩,禹保命 서울大學校農業生命科學大學附屬樹木園 1984 서울大學校 樹木園 硏究報告 Vol.- No.5

冠岳樹木園地域의 山腹斜面은 地質的으로 대보화강암에서 풍화생성된 거친 돌부수러기가 많은 粗砂質壤土로 구성되었으므로 表土層의 土壤流失이 심하여 土深이 대단히 얕거나 岩盤露出이 심하여 林木生長이 심히 不良한 地帶로서,山地의 地力恢復 및 現存하는 散生樹木의 生長力恢復을 通한 山地綠化保全이 시급히 요청되고 있다. 이와같은 요청에 부응하여 荒廢地斜面에 自生하고있는 주요한 4樹種(소나무, 리기다소나무, 노간주나무, 철쭉)에 대하여 山地施肥效果 試驗을 春期와 秋期로 나누어 실시한 결과 樹高 및 直徑生長量에 있어서 無施肥區에 比하여 현저한 施肥效果가 인정되었다. 따라서 冠岳山地帶의 荒廢地를 조속히 復舊綠化하기 위해서는 砂防土木的 工事方法 및 砂防造林的 播植方法이외에도 현존 수목의 保全 및 生長力恢復을 통한 速成綠化方法도 채용되어야 할 것이다. Hillsides in the Kwanak arboretum area were composed mainly of coarse sandy loam having relatively high proportion of rough weathered debris derived from the Daebo granite geologically. Owing to heavy soil erosion resulted to shallow soil depth and heavy rock exposures, the growing trees in this type of surface soil are very poor in their growth. For woody plant vegetation establishment in this montain area, it is urgent to recover the fertility of soil and the growth of existing trees. For this purpose, in spring and autumn season in 1983∼84 the fertilization experiment was conducted with the 4 principal native species(Pinus densiflora, Pinus rigida, Juniperus rigida, Rhododendron schlippenbachii) growing in this denuded forest land, and the effects of fertilized tree plots were more prominent than the control plot in both height and root-collar diameter growth. Therefore, the accelerating measures of vegetation rehabilitation through conservation of existing trees and recovery of tree growth by forest fertilization practices, besides forest engineering measur es and soil erosion control afforestation measures, could be acceptable as the measures for the recovery of denuded forest land in Mt. Kwanak area.

冠岳樹木園地域內 荒廢山地土壤의 肥沃化를 통한 綠化促進에 關한 硏究(Ⅱ)

李峻雨,李宗學,權台鎬,禹保命,麻鎬燮,金景河 서울大學校農業生命科學大學附屬樹木園 1986 서울大學校 樹木園 硏究報告 Vol.- No.7

The shallow soil depth and severe rock exposures on the hillslopes in the Kwanak aboretum area which resulted from the heavy soil erosion have made very poor growth of forest vegetation. In order to establish the forest vegetation in this area, it is urgent to recover the fertility of soil and the productivity of existing trees. For this reason, fertilization experiment (using the briquet compound fertilizer) was conducted on summer and autumn season in 1983 with the 4 main native species (Pinus densiflora, Pinus rigida, Juniperus rigida, Rhododendron schlippenbachii) growing on these eroded hillslopes. Result in 1985 and 1986 of this experiment represented that the fertilization was effective toward both height and root-collar diameter growth of trees and spring fertilization was, relatively, more effective than autumn fertilization. It also represented that effects of fertilization to P. rigida were more than those to other species. Therefore, besides the engineering methods and afforestation measures for soil erosion control, rapid establishment of vegetation through conservation and recovery of existing trees by fertilization is available measures for the rehabilitation of rockily eroded hillslopes like Mt. Kwanak area.

水原樹木園地域內의 自然森林植生 調査結果

李峻雨,禹保命,辛俊煥,金景河,兪鐘德 서울大學校 農科大學 1985 서울대농학연구지 Vol.10 No.2

樹木園 活成豫定地를 對象으로 土壤 水分含量과 植生을 調査하여 앞으로의 樹木園 造成에 필요한 情報를 얻음과 동시에 樹木園 造成에 따른 植生破壞後 原來植生에 關한 情報가 必要할 때 參考하기 爲하여 1985年 6月 12日에 本 調査를 實施하였는데 그 結果는 다음과 같다. 1. 全體的으로 겨이삭(Agrostis clavata var. nukabo)의 優占度가 매우 높았으며 씀바귀(Ixeris dentata)와 흰씀박귀(Ixeris dentata var. albiflora)는 극히 乾燥한 곳을 제외하고는 대부분 優占度가 높았다. 濕한 곳에는 왕비늘사초(Carex maximowiczii), 기장대풀(Isachne globosa) 等이, 극히 乾燥한 곳에서는 잔디(Zoysia japonica)가, 보통 乾燥한 곳에서는 그늘사초(Carex lanceolata), 김의털(Festuca ovina) 等이 優占度가 높았다. 2. 特히 稀貴植物인 선제비꽃(Viola raddeana)群落과 진퍼리용담(Grntiana scabra var. buergeri for stenophylla)이 Block 3(습지)에 있으므로 앞으로 이 區域은 注意깊게 保存되어야 할 것이다. 3. 土壤 水分含量이 最低 14.7%에서 最高 89.9%까지 分布하여 乾濕의 差異가 심하게 나타났다. 特히 調査 時期가 乾濕期인데도 土壤 水分含量이 70%가 넘는 곳이 3개소나 된다. 이 곳은 地下水位가 높아서 濕地이므로 濕地植物園을 造成해야 될 것이다. 植生의 造成狀態가 區域에 따라 變異가 심하게 나타났기 때문에 이 林地가 매우 不安定한 狀態에 있다고 볼 수 있을 것이다. Soil moisture contents and vegetation of the forest land planed to establish the Suweon Arboretum had been investigated to obtain some informations for establishing arboretum, and also for keeping the original vegetation composition data after the arboretum was established. The results obtained in this investigation could be summarized as follows. 1. In general, the coverage of Agrostis clavata var. nukabo was very high. The coverage of lxeris dentata and ixeris dentata var. albiflora were high except for very arid blocks. Coverages of Carex maximowiczii and Isachne globosa were high in wet blocks. The coverage of Zoysia japonica was high in very arid blocks and that of Carex lanceolata and Festuca ovina in arid blocks were high. 2. Soil moisture content was distributed from 14.7% to 88.9%. Especially the fact of the high moisture content (74.7, 77.5, 88.9%) in dry season implied that the ground water level of this area was high. The vegetation composition of this forest was varied, too. Therefore, it is considered that the stability of this forest was fragile.

荒廢山地에서의 산불이 森林植生및 土壤에 미치는 影響에 관한 硏究(III)

禹保命,權台鎬,李峻雨,金景河 서울大學校 農科大學 1986 서울대농학연구지 Vol.11 No.2

The third year's results on effects of surface fire on frest vegetations and soil properties were investigated in Mt.Gwanak, Kyunggi-do successively after the study of the first year's effects in the same place. Organic matters in soil had increased just after fire and whatsome decreased during 1 year after fire, and resulted in percentage that was less than unfired area in the third year after fire. The pH of subsoil was continuously increasing from just after fire till after 1 year, but decreased somewhat in the third year after fire. More exact classification into Increasers, Decreasers, Invaders and Neutral species was possible in the third year's study. According to comparison of similarities, the vegetational structure of the species at fired area has been gradually restoring to original state as time goes by.

土工을 中心으로 한 林道網 配置 計劃에 關한 硏究 : 白雲山 演習林 地區를 對象으로 Application in Mt. Baekwoon Research Forest

鄭道鉉,禹保命,李峻雨 서울대학교 농과대학 농업개발연구소 1992 서울대농학연구지 Vol.17 No.2

This study was aimed at determining the rational forest road networks in mountainous terrain forests by using the developed computer model. The computer model used for this study is composed of two major subroutines for digital terrain analysis and road-route selection, and the road-route selection subroutine uses the area-partitioning method in order to fully investigate alternative roading routes and to determine the layout of forest roads. The developed computer model was applied to designing a road network for the Research Forest of Seoul National University. The forest having an area of about 11,000 hectares is located in Mt. Baekwoon region of Kwangyang-gun and Gurye-gun in Chulanam-do. To evaluate the optimality of the determined road networks in this study, such factors as the average skidding distance, accessibility to forest stands, development index and circulated road network index were measured. The results of the optimality analysis of the road network is good and practicable.

樹木園 造成地域內 지존작업을 위한 아까시나무 除法試驗

辛俊煥,李峻雨,兪鐘德,禹保命,金景河 서울大學校農業生命科學大學附屬樹木園 1985 서울大學校 樹木園 硏究報告 Vol.- No.6

樹木園 造成 豫定地를 對象으로 除草劑 處理가 生態系와 景觀에 미치는 衝擊을 줄이려고 努力하면서 不必要한 아까시나무를 效果的으로 枯殺시키는 方法을 찾는데 本 試驗의 目的을 두었다. 樹皮를 톱으로 긁어낸 것과 樹幹을 切斷한 것에 글라신液劑(근사미)와 글라신液劑에 2, 4-D를 섞은 것을 1985年 7月 하순에 1回 여러 濃度로 處理한 結果를 1985年 10月 17日에 조사하였는데 다음과 같은 結論을 얻었다. 1. 樹幹에 直接 處理하는 方法으로 處理木外에 다른 周邊 植生이 받는 被害는 나타나지 않았다. 2. 樹幹의 切斷部에 處理할 境遇 景觀의 破壤는 最小化되고 또 噴霧器로 藥劑를 枝葉에 撒布하는 境遇보다 除草劑의 所要量이 1/5 以下로 감소되었다. 3. 글라신液劑의 境遇 4倍液에서 100% 枯死되었으므로 100% 枯死시켜야 할 때는 4倍液을 쓰는 것이 분무기살포법보다는 經濟的으로 效率的일 것이다. 4. 글라신液劑에 2,4-D를 섞은 것은 5倍液에서 100% 枯死되어 2,4-D를 섞은 것이 더 效果的인 것으로 나타났다. 즉 現在 2,4-D의 값이 글라신液劑보다 더 低廉하고 若干의 2,4-D만 添加하면 되므로 글라신液劑와 2,4-D를 섞은 것을 5倍液으로 稀釋하여 處理하는 것이 더 經濟的일 것이다. This experiment was conducted at the Seoul National University Arboretum at Seodun-dong, Suweon, Kyeonggi-do, Korea (1) to find out methods killing Robinia pseudoacacia L. effectively and (2) to minimize ecological and aesthetic problems. Glycine and 2,4-D were treated in several concentration following the saw-scratching and cutting of stems on July 22 and 29, 1985. The results were measured on October 17, 1985. The results obtained were as follows: 1. Ecological problems were decreased by these methods. 2. In case of herbicides treatment on section area, aesthetic problems were minimized, and amounts of herbicide consumption were five times as little as in case of spraying plants with herbicides. 3. The death rate amounted to 100% when the ratio of Glycine solution to water was 1:3, so that the concentration, 1:3 was most economical to kill the tree throughly. 4. The death rate amounted to 100% when the ratio of Glycine solution mixed with 2,4-D to water was 1:4, therefore Glycine solution mixed with 2,4-D was more effective than pure Glycine solution. Since 2,4-D solution was less expensive than Glycine solution and only small amounts of 2,4-D solution was added, it was most economical and effective method that Glycine solution mixed with 2,4-D was diluted to the concentration, 1:4 and treated on the stem.

水原樹木園地域內의 自然森林植生 調査結果

辛俊煥,李峻雨,兪鐘德,禹保命,金景河 서울大學校農業生命科學大學附屬樹木園 1985 서울大學校 樹木園 硏究報告 Vol.- No.6

樹木園 造成豫定地를 對象으로 土壤 水分含量과 植生을 調査하여 앞으로의 樹木園 造成에 必要한 情報를 얻음과 동시에 樹木園 造成에 따른 植生破壤後 原來植生에 關한 情報가 必要할 때 參考하기 爲하여 1985年 6月 12日에 本 調査를 實施하였는데 그 結果는 다음과 같다. 1. 全體的으로 겨이삭(Agrostis clavata var. nukabo)의 優占度가 매우 높았으며 씀바귀(Ixeris dentata)와 흰씀바귀(Ixeris dentata var. albiflora)는 극히 乾燥한 곳을 제외하고는 대부분 優占度가 높았다. 濕한 곳에는 왕비늘사초(Carex maximowiczii), 기장대풀(Isachne globosa) 等이, 극히 乾燥한 곳에서는 잔디(Zoysia japonica)가, 보통 乾燥한 곳에서는 그늘사초(Carex lanceolata), 김의털(Festuca ovina) 등이 優占度가 높았다. 2. 특히 稀貴植物인 선제비꽃(Viola raddeana)群落과 진퍼리용담(Gentiana scabra var. buergeri for stenophylla)이 Block 3(습지)에 있으므로 앞으로 이 區域은 注意깊게 保存되어야 할 것이다. 3. 土壤 水分含量이 最低 14.7%에서 最高 88.9%까지 分布하여 乾濕의 差異가 심하게 나타났다. 특히 調査 時期가 乾燥期인데도 土壤 水分含量이 70%가 넘는 곳이 3개소나 된다. 이 곳은 地下水位가 높아서 濕地이므로 濕地植物園을 造成해야 될 것이다. 植生의 造成狀態도 區域에 따라 變異가 심하게 나타났기 때문에 이 林地가 매우 不安定한 狀態에 있다고 볼 수 있을 것이다. Soil moisture contents and vegetation of the forest land planed to establish the Suweon Arboretum had been investigated to obtain some informations for establishing arboretum, and also for keeping the original vegetation composition data after the arboretum was established. The results obtained in this investigation could be summarized as follows: 1. In general, the coverage of Agrostis clavata var. nukabo was very high. The coverage of Ixeris dentata and Ixeris dentata var. albiflora were high except for very arid blocks. Coverages of Carex maximowiczii and Isachne globosa were high in wet blocks. The coverage of Zoysia japonica was high in very arid blocks and that of Carex lanceolata and Festuca ovina in arid blocks were high. 2. Soil moisture content was distributed from 14.7% to 88.9%. Especially the fact of the high moisture content (74.7, 77.5, 88.9%) in dry season implied that the ground water level of this area was high. The vegetation composition of this forest was varied, too. Therefore, it is considered that the stability of this forest was fragile.

樹木園 造成地域內 地존作業을 위한 아까시나무 除去試驗

金景河,辛俊煥,李峻雨,兪鐘德,禹保命 서울大學校 農科大學 1985 서울대농학연구지 Vol.10 No.2

This experiment was conducted at the Seoul National University Arboretum at Seodun-dong, Suweon, Kyeonggi-do, Korea (1) to find out methods killing Robinia pseudoacacia L. effectively and (2) to minimize ecological and aesthetic problems. Glycine and 2, 4-D were treated in several concentration following the saw-scratching and cutting of stems on July 22 and 29, 1985. The results were measured on October 17, 1885. The results obtained were as follows: 1. Ecological problems were decreased by these methods. 2. In case of herbicides treatment on section area, aesthetic problems were minimized, and amounts of herbicide consumption were five times as little as in case of spraying plants with herbicides. 3. The death rate amounted to 100% when the ratio of Glycine solution to water was 1:3, so that the concentration, 1:3 was most economical to kill the tree throughly. 4. The death rate amounted to 100% when the ratio of Glycine solution mixed with 2, 4-D to water was 1:4, therefore Glycine solution mixed with 2, 4-D was more effective than pure Glycine solution. Since 2, 4-D solution was less expensive than Glycine solution and only small amounts of 2, 4-D solution was added, it was most economical and effective method that Glycine solution mixed with 2, 4-D was diluted to the concentration, 1:4 and treated on the stem.

Increase in Guanosine 3’,5’-Cyclic Onophosphate (cGMP) by Follistatin and Synchronization of In Vitro Maturation in Porcine Oocytes

Bo Myeong Lee,Keun Jung Kim,Ji Hye Lee,Eun Young Kim,Kil-woo Han,Zhuang Lili,Wu Junbo,Dong Hee Kim,Ju Lan Chun,Jun Jong Baek,Jae Sam Lim,Jeong Yeon Cho,Min Kyu Kim 한국동물생명공학회(구 한국동물번식학회) 2015 발생공학 국제심포지엄 및 학술대회 Vol.2015 No.10