- Volume 25 Issue 2
Variation of Material Properties of Korean Red Pine of Superior Families - Tracheid Length, Microfibril Angle, Resin Canal and Specific Gravity -
소나무 우량 가계별 기초재질 변이 - 가도관, 마이크로피브릴 경사각, 수지구 분포 및 전건비중을 중심으로 -
- Park, Beyung-Su (Department of Forest Product Engineering, Korea Forestry Research Institute) ;
- Park, Jung-Hwan (Department of Forest Product Engineering, Korea Forestry Research Institute) ;
- Han, Sang-Urk (Department of Forest Genetic Resources, Korea Forestry Research Institute)
- Published : 2006.12.30
The quality of wood is largely depend on the characteristics of xylem tissue and their variation. They may include tracheid length, microfibril angle, distribution and amount of resin canal, as well as specific gravity as indicator of material properties. In this study, variation of these elements between and within 30 superior families of Pinus densifloa in progeny test forest were examined and the results are as follows; In terms of elongation ratio of tracheid length which is less than 1%, the sample tree showed a transition to matured wood after 13 years particularly in Kangwon 25, 30, 90, 56 and Chungnam 4 families. The average specific gravity were from 0.35 to 0.49, and differences between the families were significant. Number of transverse resin canal per unit area were also found to be significant between the families. The microfibril angles measured at 15th ring number ranged from 0.9 degree to 28.6 degree. More studies are necessary to tell whether these variation is inherited by genetic or individual characteristic. However it would be desirable that these elements be considered as key elements in the early stage of selection process of superior tree to ensure good quality of wood production in future.