• Title, Summary, Keyword: Korean white pine

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Estimation and Validation of Taper Equations for Three Major Coniferous Species in Gangwon and North Gyeongsang Provinces of South Korea

  • Lee, Daesung;Seo, Yeongwan;Lee, Jungho;Choi, Jungkee
    • Journal of Forest and Environmental Science
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    • v.33 no.4
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    • pp.315-321
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    • 2017
  • This study was carried out to estimate the parameters of stem taper functions, to figure out the best taper model by species, and to compare with previous studies by species, targeting on the stemmed tree samples collected from the Korean red pine (Pinus densiflora), Korean white pine (Pinus koraiensis), and Japanese larch (Larix kaempferi ) stands in Gangwon and North Gyeongsang provinces of South Korea. The seven widely used models were applied in this study, and Muhairwe 1999 model for Korean red pine and Korean white pine and Kozak 2002 model for Japanese larch were evaluated as the best model for each species according to the fit statistics and the predicted stem form comparison. In addition, the predicted diameter was suitably fitted when comparing the previous studies, and the values were more appropriate following stem taper according to neiloid, paraboloid, and cone parts by species. Consequently, the estimation of this study was considered to represent the stem taper well. When comparing stem taper of three species, the diameter was largest in Korean white pine. Overall, the taper models of this study are judged to be useful for estimating stem form and volume computation of Korean red pine, Korean white pine, and Japanese larch.

Emergence Timing of the Pine Sawyer Beetle, Monochamus saltuarius (Coleoptera: Cerambycidae) by Tree Species (북방수염하늘소(Monochamus saltuarius)의 수종별 우화시기)

  • Han, Ju-Hwan;You, Jong-Hyun;Koo, Chang-Deok;Yoon, Chang-Mann;Choi, Kwang-Sik;Shin, Sang-Chul;Kim, Gil-Hah
    • Korean journal of applied entomology
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    • v.48 no.2
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    • pp.189-195
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    • 2009
  • This study was performed to investigate the emergence timing and daily emergence from the different tree species logs (Korean white pine, Pine, and Japanese larch) at Cheongwon, Chungcheongbuk-do from 2006 to 2008. Pine sawyer adults began to emerge on early May (2${\sim}$10th day) and finished on mid-June (4${\sim}$20th day) in the Korean white pine and pine logs. However, pine sawyer adults began to emerge on mid-May (13th day) and finished late May (27th day) in Japanese larch logs, Japanese larch logs shows shorter emergence timing of pine sawyer adult compare to those of other two tree species. Emergence timing shows no difference between males and females. Sex ratios of emerged adult in 2007 were 0.55 from Korean white pine, 0.46 from Pine, and 0.59 from Japanese larch; it shows no difference among tree species. Female and male adults emerged throughout 24 hrs; 22.8% of the total adults emerged from 12${\sim}$14:00 (22.8%) and adults emerged lowest from 06${\sim}$08:00. Of the adults emerged from the logs, 98.9% was univoltine and the rest was biennial which emerged next year.

Effects of Local Climatic Conditions on the Early Growth in Progeny Test Stands of Korean White Pine (지역별 잣나무 차대검정림의 초기생장에 미치는 미기후의 영향)

  • 신만용;김영채
    • Korean Journal of Agricultural and Forest Meteorology
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    • v.4 no.1
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    • pp.1-11
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    • 2002
  • This study was conducted to reveal the effects of local climatic conditions on the early growth of Korean white pine progeny test stands. For this, stand variables such as mean DBH, mean height, basal area per hectare, and volume per hectare by stand age and locality were first measured and summarized for each stand. Based on these statistics, annual increments for 10 years from stand age 10 to 20 were calculated for each of stand variables. The effects of local climatic conditions as one of environmental factors on the growth were then analyzed by both a topoclimatological method and a spatial statistical technique. From yearly climatic estimates,30 climatic indices which affect the tree growth were computed for each of the progeny test stand. The annual increments were then correlated with and regressed on the climatic indices to examine effects of local climatic conditions on the growth. Gapyung area provided the best conditions for the early growth of Korean white pine and Kwangju area ranked second. On the other hand, the growth pattern in Youngdong ranked last overall as expected. It is also found that the local growth patterns of Korean white pine in juvenile stage were affected by typical weather conditions. The conditions such as low temperature and high relative humidity provide favor environment for the early growth of Korean white pine. Especially, it was concluded that the low temperature is a main factor influencing the early growth of Korean white pine based on the results of correlation analysis and regression equations developed far the prediction of annual increments of stand variables.

Preparation of Taper Table for Main Species (Korean White Pine) in Korea. (II) (주요수종(主要樹種)(잣나무)의 완만도표조제(完滿度表調製)(II))

  • Lee, Heung Kyun;Choi, Jong Cheon
    • Journal of Korean Society of Forest Science
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    • v.43 no.1
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    • pp.51-55
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    • 1979
  • This study discribes about method of establishing stem taper table of Korean white pine through the preparation of the stem with the sample trees of 280 felled Korean white pine. Stem curves were first classified then induced by form quotient class, stem curve equation according to Behre's stem curve formular. Relied on each calculated stem curve equation tapering degree by form quotient class and established taper table therefore.

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Heritability and Genetic Gains for Height Growth in 20-year-Old Korean White Pine in Korea

  • Shin, Man-Yong;Park, Hyung-Soon;Cho, Yoon-Jin;Chung, Dong-Jun
    • Korean Journal of Plant Resources
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    • v.19 no.6
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    • pp.677-679
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    • 2006
  • The objectives of this study were to examine the genetic variation of 20-year-old tree height and to estimate heritabilities and genetic gains of Korean white pine. Analysis of variance showed that families and family x block interaction had the significant (p=0.01) effects on tree height. However, family variation appears to be much greater than the variation due to family x block interaction. Individual tree heritability was higher ($h_I^2=0.73$) than family heritability, ($h_F^2=0.83$) therefore, combined selection showed the largest genetic gain (17.76%) in a given equal intensity of selection.

Dimensional Stability and Bending Properties of Small Diameter Log Treated by Sap-displacement Method

  • Lee, Jun-Jae;Koo, Ja-Il;Chun, Su-Kyoung
    • Journal of the Korean Wood Science and Technology
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    • v.28 no.4
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    • pp.61-71
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    • 2000
  • The effect of the treatment with CCFZ, FR-4, and PEG400 from butt end on the dimensional stability and bending properties was examined. Three softwood species such as red pine, Korean white pine and Japanese larch and three hardwood species such as poplar, alder and oak were investigated in this research. Shrinkage of red pine, Korean white pine, poplar, and alder treated with PEG400 decreased. However, there was no significant decrease of shrinkage in Japanese larch and oak. The decrease of shrinkage when moisture content changed from about 20% to 10% was larger than that at any other phase. In regard to the effect of treatment on bending properties, bending MOE and MOR of all specimens treated with PEG400 decreased significantly. Especially in the case of red pine, poplar, and alder treated with PEG400, bending MOR reduced 9%, 14%, and 12%, respectively. Reductions of MOR of the hardwood was also much larger than that of the softwood. However, in all species, treatment with CCFZ and FR-4 did not affect the change of bending MOE and MOR significantly. Comparing the large specimen which also included heartwood with the small specimen which included only treated sapwood, there was a difference in the change of bending MOE and MOR between them. The large specimens of Korean white pine, alder and Poplar, which had a relatively low proportion of sapwood(18~22%), showed the decrease of MOR by 11~13% more than that of small specimens, while red pine, Japanese larch and oak, which had a relatively high proportion of sapwood(35~40%), showed little decrease. It means that bending MOE and MOR of structural wood treated from butt end should be considered in terms of sapwood proportion as well as effect of treated chemicals.

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Thinning Intensity for Large Diameter Trees in Korean White Pine Plantation of South Korea

  • Lee, Daesung;Seo, Yeongwan;Park, Jiyoung;Choi, Jungkee
    • Journal of Forest and Environmental Science
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    • v.33 no.1
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    • pp.74-77
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    • 2017
  • The purpose of this study is to analyze the effect of thinning intensity on the growth of large diameter trees in Korean white pine (Pinus koraiensis S. et Z.) plantation. Eight thinning plots were analyzed by categorizing into heavy thinning, light thinning, no thinning (control) according to thinning intensity. As a result, average DBH increased more in heavy thinning plots than in light thinning or unthinned plots. The number of large trees (DBH>25 cm) were obviously shown the most in heavy thinning plots. It is considered that heavy thinning is needed for the production of the large diameter trees.

Studies on the Control of Korean White Pine (Pinus koraiensis) Blister Rusts (III) -A Stain Technique for Diagnosing Blister Rust of Korean White Pine- (잣나무털녹병 방제(防除)에 관(關)한 연구(硏究)(제(第) 3 보(報)) - 이병(罹病) 잣나무의 해부학적(解剖學的) 진단법(診斷法) -)

  • Kim, Chong Jin
    • Journal of Korean Society of Forest Science
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    • v.37 no.1
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    • pp.61-63
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    • 1978
  • Both bark and wood sections obtained, by cutting with a razor blade, from living tissue of Cronartium ribicola cankers of Korean white pine (Pinus koraiensis) were transferred to a mixture of 2 parts of chloroform and 1 part of methanol, and the sections were stained using a modified lactophenol cotton blue. The formula for this staining is as follows: Lactic acid 20gm, phenol crystal 20gm, cotton blue 0.05gm, and 60% EtOH 100ml. The rust hyphae and haustoria were stained blue, and the wide hyphae with straight or curved haustoria could be distingwished from the pine tissue.

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Decay Resistance of Borate-Modified Oriented Strandboard: A Comparison of Zinc and Calcium Borate

  • Lee, Sun-Young;WU, Qinglin
    • Journal of the Korean Wood Science and Technology
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    • v.36 no.5
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    • pp.1-10
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    • 2008
  • Decay and mold resistance of zinc borate (ZB) and calcium borate (CB) modified oriented strandboard (OSB) from southern mixed hardwood and southern yellow pine was investigated in this study. Brown rot fungus Gloeophyllum trabeum and white-rot fungus Trametes versicolar were used to examine the decay resistance of the OSB. The OSB test specimens were colonized by brown and white rot fungal mycelium in both the brown and white-rot culture bottles after 8 and 12 weeks, respectively. The wood species and fungus type had the significant effects on the decay resistance. Brown rot decay was evident for all untreated southern pine and mixed hardwood controls. The white-rot decay, however, did not show significant weight loss at both species control samples. The incorporation of ZB and CB composites provides suitable protection against brown-and white-rot fungi. No significant weight loss was observed from the borate treated OSB.

Pinus Densiflora Bark Extract (PineXol) Decreases Adiposity in Mice by Down-Regulation of Hepatic De Novo Lipogenesis and Adipogenesis in White Adipose Tissue

  • Ahn, Hyemyoung;Go, Gwang-woong
    • Journal of Microbiology and Biotechnology
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    • v.27 no.4
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    • pp.660-667
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    • 2017
  • PineXol, extracted from Korean red pine bark, has beneficial effects, such as antioxidant, antiinflammatory, and antilipogenic activities in vitro. We tested the hypothesis that PineXol supplementation could have anti-obesity effects on mice fed a high-fat diet (HFD). Four-week-old male C57BL/6 mice were fed normal chow (18% kcal from fat) or a HFD (60% kcal from fat). HFD-fed animals were also subjected to PineXol treatment at a dose of 10 or 50 mg/kg body weight (BW) (PX10 or PX50, respectively) body weight. The body weight and body fat mass in the PX50 group were statistically lower than those in the HFD group (p < 0.05 and p < 0.001, respectively). The concentration of hepatic triglycerides, total cholesterol, and low-density lipoprotein cholesterol were reduced in the PX50 group compared with the HFD group (p < 0.01). Acetyl CoA carboxylase (p < 0.01), elongase of very long chain fatty acids 6 (p < 0.01), stearoyl CoA desaturase 1 (p < 0.05), microsomal triglyceride transfer protein (p < 0.01), and sterol regulatory element-binding protein 1 (p < 0.05) were significantly decreased in the PX50 group compared with that in the HFD group. In white adipose tissue, CCAAT-enhancer-binding protein alpha (p < 0.05), peroxisome proliferator-activated receptor gamma (p < 0.001), and perilipin (p < 0.01) were decreased in the PX50 group compared with those in the HFD group. Therefore, the current study implies the potential of PineXol for the prevention and/or amelioration of obesity, in part by inhibition of both hepatic lipid synthesis and adipogenesis in white adipose tissue.