• Journal of the Korean Wood Science and Technology
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• v.10 no.3
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• pp.201-202
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• 1982

1. 본(本) 조사(調査) 연구(硏究)는 천연림(天然林) 관리(管理)와 인공조림(人工造林)이 임이증진에 어떠한 영향을 미치느냐? 라는 문제(問題)를 알아보고자 실시되었으나 그 범위가 너무 막연(莫然)하여 다음과 같이 실제 시업중(施業中)인 경우를 대상지로 정(定)하여 비교(比較) 평가하여 보았다. 가. 우리나라 대표적(代表的)인 천연림(天然林) 활엽수 지대(地帶)에서 일정(一定)한 임지(林地)를 벌채(伐採)한 후 계속 천연갱신(天然更新)을 시도하고 있는 경우와 동일장소(同一場所) 인공조림(人工造林)을 하였을 경우 나. 우리나라 대표적(代表的)인 천연침엽수림(天然針棄樹林) 지대(地帶)에서 일정(一定)한 임지(林地) 벌채(伐採)한 후 계속 천연경신(天然更新)을 시도하고 있는 경우와 동일장소(同一場所)에 인공조림(人工造林)을 하였을 경우 다. 우리나라 대표적(代表的)인 침활수림 척박림(瘠薄林) 지대(地帶)에서 그 임지(林地)를 그대로 보존(保存)하였을 경우와 벌채(伐採)하고 적수(適樹)를 조림(造林)하였을 경우 등으로 구분하여 실시하였다. 2. 이와 같은 조사(調査) 연구결과(硏究結果)는 다음과 같다. 가. 2. 이와 같은 조사(調査) 연구결과(硏究缺課)는 다음과 같다. 가. 활잡 천연림(天然林)을 그대로 관리(管理)하였을 경우와 낙엽송(落葉松)을 조림(造林)하여 관리(管理)하였을 경우는 후자(後者)가 임이증진에 월등(越等)히 좋은 영향을 나타냈고 나. 우량(優良) 침엽수(針葉樹) 천연림(天然林)을 그대로 관리(管理)하였을 경우는 양자간(兩者間)에 큰 차이(差異)가 나지는 않았으나 역시(亦是) 후자(後者)의 경우가 임이(林利) 증지에 유리(有利)한 결과(結果)를 나타내고 있다. 마. 침활 천연(天然) 혼효림(混淆林)으로 그 임상(林相)이 불량(不良)한 경우 그 천연림(天然林)을 그대로 관리(管理) 보호(保護)하였을 경우와 리기다 소나무를 조림(造林)하여 관리(管理) 보호(保護)하였을 경우는 양자(兩者) 공(共)히 임이(林利) 증진에 별(別)로 좋은 영향을 냐타내지 않았으며 임이(林利) 증진의 목적(目的)보다도 임지(林地) 회복(回復)을 위한 조림(造林)이 이루어져야 할 것으로 생각된다. 라. 척박림(瘠薄林)의 경우를 제외(除外)하고 본(本) 조사(調査) 대상이 된 모든 경우에 천연림(天然林)을 그대로 관리(管理)하는 경우보다 인공조림(人工造林)을 하여 정상(正常) 경영을 하는 경우가 임이(林利) 증진에 유리(有利)하다는 결과(結果)를 나타내고 있다. 마. 본(本) 조사(調査) 연구(硏究)의 목적(目的)이 천연림(天然林) 보존관리(保存管理)와 인공조림(人工造林)이 임이(林利) 증진에 미치는 영향을 알기 보기 위한 것이었으나 이것은 너무 광범한 과제(課題)이므로 명(名) 경우에 따라 판단(判斷)지어져야 할 것이다. 따라서 본(本) 조사(調査)에서도 국한(局限)된 몇 경우를 조사(調査) 검토하기로 하였다.

• Journal of agriculture & life science
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• v.45 no.2
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• pp.51-59
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• 2011

This study was conducted to analysis the growth characteristics and the diameter at breast height (10 cm) reached ages in natural stand and platation for the optimal planting density and planting timing of Acer mono for. rubripes. There was high correlation between the DBH and crown diameter (E-W: r=0.82, S-N: r=0.76) in natural stand, and between the DBH and crown diameter (E-W: r=0.76, S-N: r=0.90) in plantation. In natural stand, average reached age on DBH 10 cm was $21.1{\pm}7.0$, and was $9.2{\pm}1.3$ in plantation. Therefore, the collectable timing of sap in artificial planting short approximately 2.3 times over the natural regeneration.

• Korean Journal of Environment and Ecology
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• v.25 no.3
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• pp.358-364
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• 2011

To examine the possibility of natural regeneration of six Acer species in broadleaved mixed forest in Korean peninsula, samples of six Acer species' samaras were collected at several seed sources from September to October 2009 and 2010, and seed morphological characteristics and viability were studied using cutting method. Inflorescense type of Acer mandshuricum(AM), A. pseudosieboldianum(APS) and A. palmatum(AP) is corymb, that of A. pictum subsp. mono(APSM) and A. okamotoanum(AO) is flat-topped panicle, and that of A. ukurunduense(AU) is raceme. Number of seed-set per inflorescense proves the highest value 38.5 sets in AU and the lowest value 2.4 sets in APS. Diameter of the seeds proves highest value 13.5mm in AO, and the lowest value 4.7mm in APS. Angles between the wings proves the highest values $130.05^{\circ}$ in APS, and the lowest value $48.60^{\circ}$ in AU. Air dry weight of 20 seed-sets proves highest value 3,900mg, in AO, and the lowest value 404mg in AU. Viable seed ratio of AP proves 50%, and that of AU does 43.2%. Those of other four species ranges 8.6~22.2%. Considering postdispersal seed predators and disturbance of litter, viable seeds of APSM, AO, AM, and APS supplied in the natural forest in Korea might be insufficient for seedling establishment. This study showed that sound viable seed supply might be key factors of natural regeneration of major Acer species in Korea. The openings made by insect pests were observed on the seed-coat of APSM, AM, AU, and APS samara, and Bradybatus sharpi were observed in the samaras of APSM and AO. Further study on the seed insect fauna, pre- and post-dispersal seed viability, and annual variation on these factor should be needed.

• Korean Journal of Agricultural and Forest Meteorology
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• v.14 no.4
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• pp.222-228
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• 2012

This study was conducted to determine the natural succession process after forest fire by comparing height, relative growth rates in height (RGH), and tree density of pine seedlings with different fire severity. In the area damaged by surface fire, tree density was highest during the first 5 years after fire. However, in the area damaged by crown fire, tree density rapidly increased during first 5 years after fire. Pine seedlings were found only on the place with ridges, barren soil, and the aspect of north. Annual height growth of pine seedlings was decreased with time in all study sites. The empty space in pine stands gradually decreased by the invasion of Quercus species. The forest fire altered the pine forest into oak forest rapidly. In contrast, pine seedlings invaded steadily on the oak forest in the rocky area or the area with ridges.

• Journal of Korean Society of Forest Science
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• v.112 no.3
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• pp.331-339
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• 2023

This study was conducted to identify seed inflow characteristics according to harvest typeand to provide basic data for developing a regeneration technology for secondary growth forests in Korean red pine (Pinus densiflora) succession forest formation by natural regeneration. Experimental sites were established by applying seed tree (single and group) and clear-cutting methods (10- 20- 30-m strip and 20- 30- 40-m patch). The seed inflow characteristics of the natural regeneration site were analyzed for 6 years from 2014. Most seeds were flowed to the regeneration stand from October to November. In years with good seed fructification, more than 80% were flowed in October. The average annual seed inflow by harvest type was highest in the seed tree area (296,000 seeds/ha/yr), followed by the 20-m patch clear-cutting area (291,000 seeds/ha/yr) and 10-m strip clear-cutting area (281,000 seeds/ha/yr). The distribution uniformity of seed inflow according to treatment was analyzed in the order of the 20-m strip clear-cutting area (52.2), 20-m patch clear-cutting area (52.9), and 10-m strip clear-cutting area (56.1). As a result, the 10-m strip and 20-m patch clear-cutting areas with relatively small harvest areas showed high seed inflow and distribution uniformity.

• Journal of Korean Society of Forest Science
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• v.108 no.3
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• pp.405-417
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• 2019

We analyzed the profitability of Korea's forestry by evaluating stumpage prices of the main economic tree species. Stumpage prices are evaluated with a market value formula, subtracting logging and transporting costs from market prices of logs. If trees are sold at the current cutting age, the stumpage price of larch is about 4.5 million KRW per hectare and that of Korean pine is about 3.7 million KRW per hectare. The stumpage prices do not cover reforestation cost, which is about 6.1 million KRW per hectare. If government subsidies did not support the cost of reforestation and silviculture, there would be no profits at all. The cost of forestry is very high in terms of planting and silviculture. In the future, the prices of logs are not predicted to rise and the wages for labor are not predicted to fall. Without reforming the current forestry regime, Korean forestry is, thus, not sustainable. Therefore, low-cost forestry efforts like natural regeneration should be adopted to make forestry viable. Investments in forestry infrastructure like forest roads are also required to decrease the timber logging and transporting costs.

• Journal of Korean Society of Forest Science
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• v.107 no.1
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• pp.25-34
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• 2018

This study was performed to discover the comparison of the understory species composition and the growth velocity of the regeneration seedlings in Pinus densiflora forests being managed by the seed-tree method from 2008 year. The investigation site located in Bonghwa, Gyeongsangbuk-do province was established by eighteen quadrats such as six control ones, six slope ones and 6 concave ones, in which we carried out the vegetation survey and measured annual height growth of each seedlings. As a result of vegetation analysis, the understory vegetation of the seed-tree forest area was mainly composed of shrub plants such as Lespedeza bicolor, Zanthoxylum schinifolium, Securinega suffruticosa, Lespedeza maximowiczii and Stephanandra incisa, herb plants such as Miscanthus sinensis var. purpurascens, Carex humilis var. nana, Spodiopogon sibiricus and Artemisia keiskeana, and vine plants such as Pueraria lobata, Smilax sieboldii, Dioscorea batatas, Actinidia arguta, Vitis amurensis and Rubus crataegifolius. Especially, the vine plants were relatively more imported to the concave site than the control site and the slope site. As a result of measurement of growth velocity, the seedlings of the Pinus densiflora appeared to be 3,175 trees/ha for the non-suppressed trees and 7,842 trees/ha for the suppressed trees. In cases of the concave site, individuals of seedlings were much lower than those on the slope site, probably due to the competition effects of vine plants. Consideringly, silvicultural practices for clearing the vine plants should be inevitably accompanied. Also, the growth velocity of the suppressed and non-suppressed trees has been constantly increasing, those of the non-suppressed trees much higher than the suppressed trees. This represents that the seedlings grow rapidly after the suppressed period with competition to the surrounding plants. Therefore, specific practices such as blush control and vine clear should be carried out at the beginning stage of regeneration in the seed-tree stand.

• Journal of Agricultural Extension & Community Development
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• v.13 no.1
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• pp.227-234
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• 2006

산림관리에 있어 공동체는 중심에서 풀-뿌리단계로 관심을 받아왔다. 베트남에서, 공유림은 오랜 기간 산림에 의존하고 있는 서로 다른 공동체의 존재 그리고 종교와 긴밀히 연결되어 있다. 지난 몇 년 동안, 지속가능한 산림경영의 필요성에 기초하여, 몇몇 지역 공동체는 산림 또는 임지를 마을과 가구를 포함하여 산림에 대해 소유권을 가진 지역공동체에 할당되었다. 게다가 공동체는 또한 산림을 보호, 천연갱신과 신규조림 등 정부기구의 프로그램에 참여하였다. 산림관리에 근거한 지역공동체의 경험은 경제-사회적으로 적합한 산림관리 모델로 이것은 베트남의 서로 다른 민족의 전통관습에 따른다. 그러나 법적인 면에서, 지역공동체는 아직 산림 또는 임지에 연결된 실체로 인식되지 않고 있다. 공동체 산림관리의 두가지 형태는 (i) 그들에게 속한 산림과 임지를 공동체가 직접 관리하는 경우와 (ii) 공동체가 국가기관이 소유한 산림의 보호와 조림에 참여하는 경우이다. 이 논문은 공동체 산림관리에 대한 현재의 상황, 잠재력, 경향 및 이슈를 명확히 하여 정책담당자의 이러한 산림관리에 대한 이해를 돕는 데 있다.

• Journal of Forest and Environmental Science
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• v.10 no.1
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• pp.1-7
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• 1994

A survey of the natural regeneration of the gallery forest at the Sao Bartolomeu river, Federal District - Brazil it was carry out. Plots of $100m^2$ let established the composition of the trees succession of one hectare. 4262 plants distributed in four classes according to the height were found. The phytosociological value of the classes was respectively 3,3 2,4 2,0 2,3 and through of them it was possible to identify the phytosociological position of the species. The results of the calculations of the relative index of the natural regeneration and value of importance shows that the most important species are Cheiloclinium cognatum A.C. Smith, Piptadenia communis Benth., Faramea cyanea M. Arg., Xylopia sericea St. Hil., Copeifera lansdorfii Desf., Cupania vernalis Camb., Matayba guianensis Aublet, Virola sebifera Aublet, Ocotea densiflora Meissn and Didimopanax morototoni (Aublet) Dcne et Pl.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2003.04a
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• pp.139-144
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• 2003

수종, 영급, 밀도 등과 같은 산림의 특성을 나타내는 임상구분은 주로 항공사진 육안판독을 통하여 이루어져 왔다. 최근 항공사진과 유사한 공간해상도를 갖춘 고해상도 위성영상이 제공되면서 이를 이용한 임상구분의 가능성에 대한 관심이 높아지고 있다. 본 연구에서는 울산 인근 산림지역의 1m 공간해상도의 IKONOS 입체쌍 영상을 이용하여 임상 판독의 가능성을 분석하였다. IKONOS영상은 기존의 수치임상도와의 중첩을 위하여 수치고도자료(DEM)를 이용한 정사보정을 수행하였으며, 분광밴드의 조합을 통한 칼라영상을 이용하여 육안판독을 시도하였다. 육안판독결과 IKONOS 칼라합성영상에서 천연 소나무림과 활엽수림의 육안구분이 흑백항공사진에 비해 뚜렷하게 나타나는 것을 볼 수 있었으며, 임분의 밀도가 영상에서 나타나는 질감과 패턴의 차이로 구분이 가능하였다. 또한 기존의 임상도를 중첩하여 최근 산지개발, 산불 등으로 훼손된 지점에 대한 구분이 용이하기 때문에 기존의 수치임상도를 화연상에서 직접 갱신함으로써 최근의 산림현황정보의 유지를 하는데 적합한 것으로 나타났다.