Effect of breeding technology and trunk axial position on shrinkage and quality of 10 year old teak wood as a furniture's raw material

Shortage on teak wood availability as material for furniture industry has been solved by developing tree breeding technology and decreasing on cut rotations. Three types of teak forest breeding technology being developed is called APB, KBK and JPP-PHT-1. Breeding technology was developed as an effort to get productive and hight quality of teak stands. Decreasing on cutting rotation encourages to increase young wood utilization. This study was aimed to determine the effect of breeding technology and axial stem position on teak wood shrinkages and wood quality of 10 years old. Nine trunk of 10 years old teak trees were harvested on forest areas of Nganjuk Forest District, East Java Province. These trees consisted of seedling grown by APB, KBK and JPP-PHT-1 breeding technology of which consisted of three trees on each kind of breeding technology. Three disks were taken from each trunk, namely from the butt, middle and upper parts. Wood shrinkages on tangential and radial and its ratio were measured based on British Standard method. Data were analyzed by using variance analysis arranged in blocked factorial and further testing were performed by using HSD Duncan. Wood quality was determined by using Suranto method. Results showed that interaction of twoo factors did not affect on tangential and radial shrikages and also tangential-radial ratio. Tree breeding technology very significantly affects on tangensial shrinkage and significanty effect on radial shrinkage. APB breeding technology produces the greatest tangential shrinkage (8.46), followed by KBK (6.62) and JPP-PHT-1 (6.59). APB breeding technology produces the greatest radial shrinkage (5.51), followed by KBK (5.08) and JPP-PHT-1 (4.42). The axial tree trunk position affects only on tangential and radial ratio. The stem base has a largest T/R ratio (1.84), followed by middle part (1.45) and upper part (1.26). In term of wood shrinkage, Breeding technology affects the wood quality. APB breeding technology produces the lowest timber quality (3.30), followed by JPP-PHT-1 (2.85), and KBK (2.78). © Published under licence by IOP Publishing Ltd.