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홍성천 한국임학회 1989 한국산림과학회지 Vol.78 No.1
1987년 12월부터 1년간 이 지역을 답사하여 얻어진 결과를 다음가 같이 요약 할 수 있었다. 1. 서부 Montana주는 Rocky산맥이 관통하고 있어 험준한 산악이 많은 지역이다. 2. 화강암, 석회암이 많고 Cyroborolls, Cyroborallfs 등의 산림토양이 많다. 3. 연강수량은 약 500mm 정도이며 대부분 겨울철에 눈으로 내린다. 연평균온도는 4℃ 4. 목재생산 목재가공 야생동물 수자원 혼모임업이 조화를 이루고 있는 지역이며 임업경제가 지역경제에 미치는 영향이 크다. 5. Elk Deer Bear 등의 야생동물의 밀도가 높다 6. 주로 천연갱신작업으로 후계림이 계승되고 있으며 임업작업중의 난제는 산불진화에 있었다. 7. 수평적으로 Ponderosa 소나무, Psedotsuga menziesii가 50% 이상을 점유하고 있으며, 수직적으로는 Pinus-Pseudotsuge(Larix)-Picea-Abies-Tsuga 속의 순으로 분포되고 있었다.
삽수조제의 (揷穗調製) 다름에 따른 일중의 (日中) Leaf Water potential 의 변화
홍성천,김영호 ( Sung Cheon Hong,Young Ho Kim ) 한국산림과학회 1981 한국산림과학회지 Vol.54 No.1
This thesis emphasize on diurnal changes of leaf water potential in relation to differences of cutting arrangement. 1. the more is leaves attached to the cutting, the higher is water stress in the cutting compared with less leaves. 2. The less is diameter of cut-part, the more are shown changes in increased and decrease in diurnal leaf water potential. 3. The more is length of stem, the more are shown water stress in diurnal leaf water potential 4. there is no differences between earthen-ball cutting and non-earthen ball cutting in diurnal leaf water potential. 5. Cuttings with two year`s slip, compared with one year`s leaf water potential increases slowly, dry weigh of root and numbers of rooted cutting are most likely dependent upon other factors rather than the water stress.
영일사방사업지의 토양단면 및 식생구조(植生構造)의 변화
홍성천,주성현,정인구 한국임학회 1982 한국산림과학회지 Vol.55 No.1
砂防事業後 4年, 6年, 8年이 경과했을 때의 砂防事業地의 土壤斷面 및 植生構造의 變化를 調査한 結果는 다음과 같았다. 1. 砂防事業後 年度가 經過함에 따라 L層, F層, H層, 表土層의 두께가 증가하는 傾向이었으며 事業後 6年째 비로소 H層(Humus)이 나타남을 알 수 있었다. 2. 表土의 化學的 成分은 事業前과 事業後 8年째와 비교했을 때 有機物은 2倍, 全窒素는 6倍 增加하였고, K, Ca, Mg, Na등 無機物은 微量으로 增加는 하였으나 큰 차이는 없었으며, P₂O5 (인산)은 오히려 減少하는 傾向을 나타내었다. 3. 砂防事業當時 播種·植栽한 새 (인고초), 솔새, 개솔새 등의 陽性草類와 싸리는 年度가 經過함에 따라 積算優占度(SDR₃)가 급격히 감소한 반면 아까시아는 급격히 增加하였다. 4. 砂防事業後 年度가 경과함에 따라 이 地域의 鄕土樹種인 Quercus類, 準極盛相인 소나무 稚苗의 頻度가 增加해 가고 있었다.
홍성천,윤충원 한국임학회 2000 한국산림과학회지 Vol.89 No.3
The objectives of this study were to classify the types of vegetation in Pinus densiflora for. erecta stands. The study sites were located at Sokwang-Ri, Mt. Chungok(1,276m), Uljin, Mt. Kumma (1,017m) and Mt. Eungbong(1,267m). Two hundred thirty releves were classified and explained by phytosociological analysis(the method of ZM schools), and the results were summarized as follows. Pinus densiflora for. erecta stands were classified into Vaccinium koreanum community, Rhododendron micranthum community, Quercus dentata community, Acer pseudosieboldianum community, and Typical community. Quercus dentata community was divided into Festuca ovina group, Robinia Pseudoacacia group, and Typical group, and Acer pseudosieboldianum community was divided into Hydrangea serrata for. acuminata group, Disporum smilacinum group, Magnolia sieboldii group, Carpinus laxiflora group, and Typical group, and Typical community was divided into Melampyrum roseum group and Typical group. And some groups were divided into 7 subgroups. Therefore, Pinus densiflora for. erecta stands had total of 16 vegetation units, out of those units, Vaccinium koreanum community distributed all over the studied areas. While Rhododendron micranthum community distributed mainly at Sokwang-Ri and Mt. Chungok. Therefore it was considered to be useful indicator in determining the range of afforestation and natural distribution of Pius densiflora for. erecta stands. The classified vegetation units were investigated by using of coincidence method. The results indicated that Quercus dentata community distributed mainly below 100 meters at the sea level, while other communities distributed above 350 meters at the sea level. According to the correlations between vegetation units and topography, Vaccinium koreanum and Rhododendron micranthum communities distributed mainly above middle slope areas, Quercus dentata community distributed mainly from lower slope to upper slope areas, Acer pseudosieboldianum community distributed mainly between valley and lower slope areas, and Typical community distributed mainly above upper slope areas. According to the correlations between vegetation units and 5 study areas, Quercus dentata community was distributed in the region of Uljin, and other communities were evenly distributed over other studied areas. According to the correlations between the units and aspects, all communities occurred all aspects, but most of the communities tended to be more distributed at south slopes than at north slopes, which meant that the relic stands of Pinus densiflora for. erecta were remained largely as patch phase status at south slopes.