Pengaruh Metode Pengeringan dan Jenis Sortimen Kayu Suren terhadap Kecepatan dan Cacat Pengeringan
Abstract: Efforts to improve
productivity of wood industry must be supported by increasing supply of wood as
raw materials. The limited wood supply due to natural forest degradation can be
increased by wood harvested from plantation forests, including wood of suren (Toona
sureni Merr) as one species composing the forests. In timber processing wood
drying is an important aspect determining product quality. This study aimed to
identify the effect of drying method and sortimen dimension on drying character
of suren wood.
Trunks of 3 suren trees of seven to nine years old were cut from
Manggihan village, Getasan district, Semarang regency. The bolts were sawn
(using blambangan method) to obtain sortimen papan wood of 3 cm (thickness), 8
cm (width), and 210 cm (length) and sortiment usuk wood of 4 cm, 6 cm and 210
cm. Beside two levels of sortimen size, two levels of drying method, e.g.
natural and solar drying were also used in this research. Resulted data were
analyzed with factorial complete randomized design. Measured parameters
consisted of drying rate, dimension shrinkage and some drying defects e.g.
bowing, cupping, end check, surface check and fungi infection.
Research results showed that drying methods significantly affect drying
rate, but not other parameters. Also, product dimension affects significantly
to drying rate, but not other parameters. Interactions between the two factors
did not give any significant effect on all parameter. To produce the same
drying level on the same product size, solar drying method is faster than
natural one. To reach dry wood with 14% moisture content in solar drying
method, sortimen papan and usuk needs 23 and 26.8 drying days respectively,
while in natural drying method, the same product size needs 44.6 and 48.50 days
of drying respectively.
Keyword: suren lumbers, drying
method, drying rate, shrinkage, drying defects
Penulis: Yustinus Suranto,
Mugiyana
Kode Jurnal: jpkehutanandd090006
