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RISS 인기검색어
- 검색키워드
- 저자 : Shae Pyo Lee ) (검색결과 2 건)
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낙엽송 ( Larix leptolepis Gorden ) 의 심부재 (心腐材)
민두식(Du Sik Min),이세표(Shae Pyo Lee),최태호(Tae Ho Choi) 한국산림과학회 1990 한국산림과학회지 Vol.79 No.4
This study was carried out to investigate the cause of pith-damaged wood formation, the state of growth, and difference of chemical composition of Japanese Larix(L. leptolepis Gorden). 1. Larix grew normaly to 10 years, and the volume increment was 32.4%. But it was gradually decreased to 19.4% from 11 to 13 years that the heartwood damage was occurred. Therefore, the volume increment was decreased 13%. The decayed wood was formed from fire wound portion of bark by forest fire. The volume loss from pith-dagmaged wood occurred by forest fire was more than 20%. 2, On the ash content, heartwood(0.05%) and pith-damaged wood(0.08%) was lower than sapwood(0.29%). The difference of extractive contents are considered the reason. It is considered that this ash content difference is depend upon the extractive contents among sap, heart and decayed wood parts. Holocellulose contents were from 54.3% to 59.3% and there were no difference among heartwood, pith-damaged wood, and sapwood, On the pentosan contents, heartwood(6.3%) and pith-damaged wood(6.6%) were higher than sapwood. Lignin contents of pith-damaged wood was tower than heartwood (34.4%). This seems to weaken all kinds of wood strength.
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산칠량이 (産漆量) 많은 옻나무개체의 선발에 관한 연구
현정오,김만조,이세표 ( Jung Oh Hyun,Mahn Jo Kim,Shae Pyo Lee ) 한국산림과학회 1993 한국산림과학회지 Vol.82 No.2
This study was conducted to investigate characteristics related to lacquer yield and to evaluate possibility of indirect selection of Rhus verniciflua Stokes. Twenty-four lacquer trees were randomly selected for measuring growth, urushiol content and bark thickness. Urushiol content showed a significant positive correlation with outer bark thickness and secretory canal density at 1% level, and with inner bark thickness at 5% level. Bark thickness and secretory canal density could be used as indicators for high urushiol content within bark and thus for high lacquer yield. Mass selection for high lacquer yield was made based on urushiol content within bark. Sixteen individuals with the highest urushiol content value were selected for breeding. As expected, the selected trees had thicker bark. higher density of secretory canal, better developed secretory canals compare to the non-selected lacquer trees.
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