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신만용,Md.Danesh Miah,Muhammad Sadeq,이경학 한국산림과학회 2004 한국산림과학회지 Vol.93 No.6
Homestead agroforestry system plays a great role in the subsistence livelihoods of rural Bangladesh. Segmentation of the agroforestry components in the homestead can show a detail scenario of the contribution and dynamics of this system. To ascertain the contribution of homestead agroforestry components to the rural livelihoods of the Old Brahmaputra floodplain area of Bangladesh, a sample survey was conducted. To determine what products contribute the rural livelihoods at what scale, the study was undertaken. A total of 14 agroforestry products and their utilization practices in the traditional homesteads were identified. All portions of the three products were found to be utilized by their own and all portions of only one product found to be sold to the market. Rest of the agroforestry products had both own utilization and sale to the market. It was revealed that from the sale of the products to the market 27,259 tk./year revenue was earned by a household owner. Fuel supply, fruit production, vegetable production, protein supplementary sources were found as the important contribution of the homestead agroforestry system. The study shows an effective combination of the agroforestry components in the homestead, which are capable to support the subsistence livelihoods of the rural people of Bangladesh. It suggests some more research activities to explore the socio-biological interaction among them. The findings of the study may be necessary for the policy makers of the agroforestry development in Bangladesh. However, the findings prove the hypothesis.
입지에 따른 전나무 신갈나무 천연 혼효 임분의 구조 분석
신만용,임주훈,전영우 國民大學校 山林科學硏究所 1994 山林科學 Vol.6 No.-
Silvicultural practice methods appropriate to each site position are adopted based on the stand structure analysis for natural mixed stands of Abies holophylla-Quercus mongolica. Boundary of potential practice area is established from tree height data and vegetation data by species classification. From the result of tree height distribution patterns for each species, two types of practice methods are selected : one is selection cutting forest and the other is high forest. The selection cutting forest is appropriate to the lower site than middle part of the slope(under than 900m above sea level) in which is composed mainly of Abies holophylla. The high forest should be composed mainly of Quercus mongolica and should be established on the upper site than middle part of the slope(between 900m and 1200m above sea level). Carpinus laxiflora are choosed as the supporting species which might suppress sprouting from stem and make the stem form of high layer species straight. On the other hand, the excessive dominating and growing of Acer pseudo-sieboldianum in current stand structure should be controled through the application of silvicultural practice methods.
申萬鏞 國民大學校 山林科學硏究所 2001 山林科學 Vol.13 No.-
본 연구는 임분의 형태에 따라 구분된 낙엽송 임분과 천연 활엽수림을 대상으로 임목간의 경쟁관계를 합리적으로 구명할 수 있는 다양한 경쟁지수 중에서 각 임분 유형에 적합한 최적 경쟁지수를 선발하기 위해 수행되었다. 이를 위해 2개의 거리종속 경쟁지수 모형과 6개 경쟁목 선정방법의 조합에 의하여 만들어진 12개 경쟁지수와 1개의 거리독립 경쟁지수, 즉 총 13개의 경쟁지수와 흉고직경의 정기평균생장량과의 상관분석을 통해 임분 유형별로 적합한 경쟁지수를 선발하였다. 정기평균 생장량과 13개 경쟁지수의 상관을 분석한 결과, Martin-Ek 경쟁지수 모형의 경쟁목 선정은 중심목의 수관 최하단에 50°로 시준하여 주변 경쟁목의 수고를 고려하는 경쟁지수 ME-H2가 낙엽송 임분의 경쟁관계를 가장 적합하게 설명하는 것으로 판명되었다. 반면에 천연 활엽수림의 경우에는 Schro¨der-Gadow에 의해 제안된 거리독립 경쟁지수인 S-G 모형이 12개의 거리종속 경쟁지수보다 생장 추정 능력이 우수하여 가장 적합한 것으로 판명되었다. 본 연구로부터 얻어진 결과는 각 임분 형태에 따른 생장 예측과 사업체계의 정립에 필요한 기초자료를 제공할 수 있을 것으로 기대된다. This study was conducted to the best competition index for the investigation of competition status among individual trees grown in Japanese Larch stand and natural deciduous stand, respectively. For this, twelve distance-dependent competition indices and one distance-independent competition index were compared to select the best competition index by the correlation analysis with periodic annual increments of diameter measured in each stand. Based on the correlation analysis, it was revealed that the competition index of ME-H2 was better in terms of the performance than others in Japanese Larch stand. On the other hand, in natural deciduous stand, S-G model of distance-independent competition index was better than any other distance-dependent competition indices in the performance. The results obtained in this study are expected to provide a basic information about growth patterns important to future stand prediction and silvicultural systems which can be applied to each of different stand types.
申萬鏞 경희대학교 부설 식량자원개발연구소 1990 硏究論文集 Vol.11 No.-
As a method of testing aptness for a specific regression model, the lack of fit test was employed. Using this method, height-DBH data from 84 plots of Korean White Pine plantation in GaPyung, Kyug-Ki Province were analyzed to examine whether or not a log linear regression model fits well to the given data. A log linear regression model was appropriate for height-DBH relationship of Korean White Pine plantation in GaPyung, Kyung-Ki Province. The resulting prediction model was ln(H)=3.34+14.67 D^(-1). The same linear model could be tarnsformed to the hieght-DBH curve such as H=28.22 e^(14.671D). Using this nonlinear regression model, it could be predicted that Korean White Pine planted in GaPyung locality has the maximum height of 28.22 meters.