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INDONESIA
Jurnal Penelitian Hasil Hutan
Published by Badan Penelitian dan Penegembangan Kehutanan
ISSN : 02164329     EISSN : 24428957     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management
Arjuna Subject : -
Articles 1,559 Documents
 139   140   141   142   143 
ANATOMI DAN KUALITAS SERAT KAYU Sissi Artistien; Y I Mandang
Jurnal Penelitian Hasil Hutan Vol 20, No 3 (2002): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2002.20.3.243-247

Abstract

Since 1998. Indonesia has been importing wood items in shapes and species from other countries. This situation should not happen if we were able to use local wood species optimally. Wood anatomy of Hibiscus macrophyllus and Artocarpus horridus have been described for identification purposes and evaluation of the appropriate uses.Several particular important features for identification have been observed, as follows : (a) axialparenchyma diffuse in aggregates in Hibiscus macrophyllus. and axial parenchyma aliform in Artocarpus horridus, (b) Ray and fibers storied in Hibiscus macrophyllus and helical thickenings in ground tissue fibers in Artocarpus horridus. (c) mineral inclusions present in Hibiscus macrophyllus in the form of prismatic crystals and druses.The effect of height (upper. middle, and bottom trunks) and distance from the pith (core of the trunk) was significant on fiber dimensions of Hibiscus macrophyllus and Artocarpus horridus. However, such interaction did not bring about significant effect on the fiber wall thickness. About fiber length, it decreased with height levels from the bottom toward the top portion of trunk. Meanwhile, the fiber length increased from the pith toward the portion adjacent to the bark.The relationships between distance from the pith (X) and fiber length (Y) of Hibiscus macrophyllus can be described in three regression equations, as follows: Y = 749 + 1896X + 998X2, R1= 0.4505 (top portion), Y = 664 + 2419X - 1410X2, R2 0.4729 (middle portion), and Y= 1431 + 430X 270X - R1 - 0.0249 (bottom portion). likewise, the corresponding three regression equations for Artocarpus horridus are Y 1177 + 1537X - 927X2 R2- 0.2538 (top portion), Y - 1037 + 1207X - 314X2,R2 0.5519 (middle portion), and Y = 1480 + 969X 674X2, R2= 0.0625 (bottom portion).The fibers of Hibiscus macrophyllus and Artocarpus horridus have a medium quality. These species are therefore suggested for pulp and paper. Hibiscus macrophyllus is suggested too for light construction and mebel.
KELAYAKAN EKONOMI BAHAN BAKU INDUSTRI SEKUNDER DARI LIMBAH KAYU PEMBALAKAN DI PROPINSI JAMBI (The economic feasibility of utilizatiion of logging waste for secondary industry’s raw materials Jambi Province) O K Karyono; hariyatno dwiprabowo
Jurnal Penelitian Hasil Hutan Vol 11, No 4 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1993.11.4.148-152

Abstract

Raw material for the wood proccesing industries in Jambi Province, is supplied by the concessionaires in Jambi Province, as well as from other. regions such. as from Riau Province. As the number of wood industries increase raw material supply for wood industries in jambi need to be increased. To fill in part of the shortage, the uSe of logging waste needs to be encouraged.Of forest area of Jambi Province about 2,9 million ha, the amount of logging waste is estimaled around 162,118.51 cum. the amount of logging waste which have been used by some concessioners in the Jambi Province accounted for 3,83 percent This figure impliS. that logging waste utilization should be intensified, so raw material for secondary industries can be increased without necessarily to increase logging area, and it wil also save forest resurces and increase added value.Old study show that use of logging waste prpvides profit margin as much as : Rp. 6. 750,- per cubic meter for concessionaire,Rp.28.150,- for sawmill and Rp. 42.525.- for blackboard industries.
DIMENSI SERAT DAN KOMPOSISI KIMIA KAYU ALPOKAT Yacob Ando
Jurnal Penelitian Hasil Hutan Vol 5, No 2 (1988): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1988.5.2.77-79

Abstract

The  fiber  dimension   and  chemical composition of  Persea sp. are presented  in this report.  The analyses include determination   of the  fiber  dimension (length, diameter cell  wall thickness, and Runkel ratio), and chemical composition. (cellulose, lignin, pentosan, ash,   extractives, and solubility in one percent  sodium hydroxide  solution).The study  reveals that the average  fiber length is 1105.36 µ, diameter 19. 09 µ,  cell wall thickness  2,36 µ and Runkel ratio  0.37.  The  cellulose  content amounts to 45.46  percent,  lignin 23.71 per cent,  pentosan  19.67 percent and ash 1.27 percent.The  solubility  in cold  water ; was found to be  5.43  percent;  in hot  water  5.55  percent, in alcohol  benzene 1:2 ratio,  4.02  percent  and in one  per cent sodiumhydroxide  solution 11.36 percent.Based on the  fiber dimension and the chemical composition, it was found that Persea wood  is suitable for producing good  quality  paper.
STUDI LIMIT DIAMETER PADA SISTEM TEBANG PILIH HUTAN ALAM Hariyatno Dwiprabowo
Jurnal Penelitian Hasil Hutan Vol 7, No 1 (1990): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1990.7.1.1 - 7

Abstract

Indonesian Selective Cutting (Tebang Pilih  Indonesia) as a silviculture  system  pays  a  considerable  attention to the growth  of seedlings  and saplings in  the forests  as it is considered  to represent  the fourth generation  in the succession  of the  tropical  rain forests. However, there is some question as to how  to relate  the growth  to the detennination   of cutting diameter   limit  quantitatively   such  that  in detennining   the diameter  limit  the growth  of  the seedlings can  be. part  of  the objective  to be considered.With  regard  to  this  problem a  study was conducted  in S. Seruyan Hulu  and  S.  Jelang - S. Delai  forests, Central Kalimantan, to examine the relationship between the height  of seedlings of  meranti  species  (Shorea  spp.)  and tress basal area in several sample  plots.   The  relationship  expressed   in  a  polynomial  regression equation  then  was used  to find  the optimal  diameter  limits  with a criterion  of maximizing   the height  of the seedlings.The  study showed   that  the optimal  diameter  limit  was dependent   upon  the  trees basal area and  the distribution  of trees diameters  of the stand.
PENGARUH UMUR DAN POSISI LETAK RUAS PADA BATANG TERHADAP SIFAT PENGERINGAN TIGA JENIS BAMBU Efrida Basri; Saefudin Saefudin
Jurnal Penelitian Hasil Hutan Vol 22, No 3 (2004): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2004.22.3.123-134

Abstract

Bamboo is an important multipurpose plant in Indonesia. It is widely used in industry, construction. furniture, and other purposes. As a raw material like solid wood, bamboo needs to be dried. Proper drying can minimize its dimensional changes during usage. improve strength, and eliminate other processing defects. This study was intended to examine influence of age and culm position on drying properties of three bamboo species, i.e. mayan (Gigantochloa robusta Kurz), tali (Gigantochloa apus Kurz). and hitam (Gigantochloa atroviolacea). The most optimum drying temperature for the three species was also determined in this study. Determination of drying schedule was initially explored using medium temperature (80°C) and observing visual defects that may generate during drying, i.e. splits/cracks, and concave or collapse.Results showed that drying properties of each bamboo species were affected by the age and the culm position. The older tree age and the closer the culm location to the top porsion then the lower the shrinkage. Immature culm had a higher drying rate than the mature one, but it had a lower quality. The most suitable drying temperature for those bamboos was ranging about 30 -50°C. The proper drying temperature, however, still needs, further trials prior to any usage for commercial operation. 
PENCARIAN PENGGANTI KAYU JELUTUNG (Dyera spp.) UNTUK BAHAN BAKU BATANG PENSIL Y I Mandang
Jurnal Penelitian Hasil Hutan Vol 14, No 6 (1996): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1996.14.6.211-230

Abstract

The importance of suitable wood for pencil slat is primarily for school children under eight years old who still not have sufficient skill in taking care themselves from the danger of using sharp tools. Jelutung wood has been the main source of pencil slat in Indonesia for about 20 years. It can easily be peeled with pencil sharpener specially designed for children usage. However, the supply of jelutung wood is no longer sufficent to meet the rising demand of pencil slat. It is therefore necessary to search for alternative.Experiment with pulai (Alstonia spp) which has nearly the same physical properties with jelutung showed lower pencil quality. Pencils made of pulai are generally more difficult to peel with pencil sharpener. The main cause lies in the anatomical structure of wood. Parenchyma distribution patterm in pulai are tangentially banded, with frequency ranges from 1 - 4 bands per mm radially. Parenchyma distribution pattern in jelutung are scalariform or diffuse in agregate, forming short tangential lines between the rays, with frequency ranges from 6 - 9 lines per mm radially.Bayur (Pterospermum spp) is known to has parenchyma distribution pattern similar to jelutung 's. Experiment with P.celebicum, P.elongatum, P.javanicum and P.diversifolium with sample specific gravity up to 0.50 showed easy peelability. Morever the colour of wood is pink to red brown so it does not need staining with colour substance as usually being done for jelutung and pulai. It is therefore recommeded to use bayur as jelutung substitute in pencil manufacturing. However, to guarantee the continuity of supply, bayur is need to be planted from now on. For bayur is suitable, not only for pencil slat but also for many other purposes.Key words : Pterospermum. wood anatomy, pencil slat
ANALISIS HARGA KAYU TUSAM DARI HUTAN RAKYAT DI SUMATRA UTARA: PENTINGNYA REFORMASI KEBIJAKAN Satria Astana
Jurnal Penelitian Hasil Hutan Vol 16, No 2 (1998): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1998.16.2.100-120

Abstract

Di Sumatera Utara,harga kayu tusam di tingkat petani adalah rendah.Pada tahun 1995,Gubernurnya memberlakukan harga dasar untuk menaikkan harga tersebut dengan keputusan Gubernur no.522.21/2342/1995,harga dasar berkisar antara Rp 15 000 sampai Rp 45 000 per m3. Diharapkan berpengaruh.tetapi,keputusan tersebut gagal mencapai tujuannya,sebagaimana petani masih menerima harga pasar sebesar Rp 8 076 per m3.lebih jauh,harga dasar tertinggi hanya dapat menutupi harga pokok untuk tusam yang tumbuh pada Bonita 17,sebesar Rp.44 815 per m3.Sebaliknya, kenaikan harganya sebenarnya akan terjadi jika terdapat reformasi kebijakan pada perdagangannya.jika reformasi dilakukan dengan berhasil.harga di tingkat petani akan meningkat seperti 65.879 per m3.ini berarti akan layak bagi tusam yang ditanam pada bonita III .jika demikian halnya, dapat diharapkan petani akan bersedia menanam tusam.Pada gilirannya,produksi tusam akan terjamin dan demikian juga dengan pendapatan petani.
SIFAT PAPAN WOL KAYU DARI 10 JENIS KAYU NUSA TENGGARA BARAT l M Sulastiningsih; Rodjak Memed; Paribotro Sutigno
Jurnal Penelitian Hasil Hutan Vol 9, No 5 (1991): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1991.9.5.183-188

Abstract

The results of laboratory   test of wood-wool  board properties made fram ten wood species obtained from Nusa  Tenggara province are reported in   this paper.   The properties tested were board  density,   moisture  content,  thickness  reduction  due  Io compression   and  benJing strengih.The Study  revealed   that the average yield of  wood-wool was 423,6 kg per cubic  meter of  log input.   The wood-wool   of  Anthoceplus cadamba  Miq.  and Anthocephallus  sp.  must  be soaked  in cold  water for  24 houn   prior  to manufacturing   of wood-wool   board,  whereas she other species did not require soaking.   The physical  and mechanical  properties  of wood-wool  board from  nine wood  species  mineralized  with CaCl2 solution  were in conformity   with the  DIN  1101 standard.  However, only  three wood  species   mineralized   with Ca   (OH)2  suspension met  the standard  requirement.
PENENTUAN FAKTOR KONVERSI DALAM PROSES PENGOLAHAN ROTAN SEBAGAI DASAR PEMBAYARAN TARIF JURAN HASIL HUTAN DAN EFISIENSI PRODUKSI Jasni Jasni; Osly Rachman; Jamaludin Malik
Jurnal Penelitian Hasil Hutan Vol 19, No 3 (2001): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2001.19.3.175-184

Abstract

Conversion factor is a value representing the conversion in rattan processing. The convert mainly happened on physical properties such as moisture content and specific gravity. They convert volume and weight. That conversion factor is important to be determined accurately, because it will affect production cost and forest product's fee paid by rattan producer.Four species of a large and small diameter rattan were studied i.e. Seuti (Calamus omatus Bl), Bubuay (Plectocomia elongata Bl) Seel (Daemonorops melanochaetes Becc.) and Pelah (Daemonorops rubra Bl.). The conversion factor was counted on the basic of weight and volume decreas.The results indicated that conversion factor of large rattan from fresh rattan to polished are 35.6­41.2% by weight and 68.5­83.0% by volume. Conversion factor of small rattan that processed until splitting are 28.5­25.1%  skin and 7.3­9.8 % by core weight.
SIFAT PEMESINAN 36 JENIS KAYU DARI DAERAH IRIAN JAYA Osly Rachman; Jamal Balfas
Jurnal Penelitian Hasil Hutan Vol 4, No 1 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1987.4.1.1-11

Abstract

This article presents test results of the machining properties  of 36 wood species from  Manokwari,  lrian Jaya.  The test method used was the modified  ASTM D-1666 described in Forest Products  Research Institute Report No.160 (1982). In most of the species 25 or more samples  were available for test. All test material was dried to equilibrium Moisture content condition (15 to 18% moisture  content). The machining properties that were investigated were planing, shaping, boring,   mortising, turning and sanding.Some of  the species tested are consistenly better than average in most respects. The species have good machining properties are sehiega.koesigoro, seyam, matoa, kerbai and petian.   Whereas some species, such as fofo, sehiye, wafut, basuoh,  serakka  and  bimiek  are consistently poorer. The others species are good  in some properties  and fair  or poor in others.

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