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Articles 6 Documents
Search results for , issue "Vol 11, No 6 (1993): Jurnal Penelitian Hasil Hutan" : 6 Documents clear
EFISIENSI ENERGI KAYU PADA PROSES PENGERINGAN PAPAN (Waod energy efficiency on timber drying) Nurhayati, Tjutju
Jurnal Penelitian Hasil Hutan Vol 11, No 6 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (19608.116 KB) | DOI: 10.20886/jphh.1993.11.6.228-231

Abstract

The purpose of this research is to study the efficiency wood utilization as an energy source on timber drying. The research was conducted at big and medium scale industries of sengon (Paraserianthes falcataria) wood working which used steam boiler and air duct-fired stove, respectively and at small industry of ramin (Gonisthyllus bancanus) wood working which usedhot water-fired stove.The result indicated that the highest wood/waste energy efficiency obtained was 53 % from big, scale sengon industry which used slabs and trimmings waste as energy source and the lowest one was 14.20% from medium sengon industry.
ANATOMI TUJUH JENIS KAYU DARI SULAWESI TENGAH. (Anatomy of seven Wood Species from Central Sulawesi) Mandang, Y I
Jurnal Penelitian Hasil Hutan Vol 11, No 6 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (9325.038 KB) | DOI: 10.20886/jphh.1993.11.6.211-216

Abstract

Wood anatomy of three broad-leaved tree species and four coniferous tree species from Central Sulawesi were observed and described for identification purposes. Fiber dimensions were also measured for evaluation of their quality for pulp making.The three broad-leaved woodspecies (Pouteria firma, Castanopsis javanica and Tristania maingayi) are different in many aspects of wood anatomy so that they are easy to identify. The four coniferous wood species (Agathis philippinensis, Podocarpus imbricatus, Phylocladus hypophylus and Dacrydium beccarii) are similar in many aspects of wood anatomy so that they are difficult to distinguish from each other. More material is needed for furher observation.No single species among the three broad-leaved wood species contain fibers with good quality. All of the four coniferous wood species contain fibers which are moderately good for pulp.
EFISIENSI PENEBANGAN KAYU DI KAWASAN HUTAN DENGAN SISTEM TEBANG PILlH INDONESIA (The efficiency of tree felling at the natural forest areas using the Indonesian selective cutting and planting system) Dulsalam, Dulsalam
Jurnal Penelitian Hasil Hutan Vol 11, No 6 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3842.449 KB) | DOI: 10.20886/jphh.1993.11.6.232-240

Abstract

An investigation of the efficiency of tree felling at forest areas using the Indonesian selective cutting and planting system (TPTI) was carried out at 5 logging companies in Central Kalimantan and 3 other companies in South Kalimantan in 1990. The objective is to find the way increasing the efficiency of tree felling at the natural production forests. For that purpose, data on felled tree volume, actually utilized logs and part of good logs left in the forest were collected. The investigationresults are as follows :1. Considering log diameter of 10 cm and up, the efficiency of improved felling technique can be increased by 6. 23 %.2. By using the improved felling technique, the volume of good quality clear bole logs is increased by 4. 90 %.3. The averages of stump heights between improved and existing felling techniques were 51.07 cm and 114.86 cm, respectively.4. the improved felling technique could increase the quality and volume of log for veneer (from 61.34% to 65. 83%) and for sawn timber (from 10.19 % to 10.45 %).5. It is necessary that the existing felling technical guidance and log administration be improved.
PENGARUH KONSENTRASI MINALIT DAN JENIS KAYU TERHADAP SIFAT RETENSI DAN KETAHANAN API (The effect of minalits concentrstion and wood species on retention and fire resistance properties) Nurhayati, Tjutju; Suprapto, Suprapto
Jurnal Penelitian Hasil Hutan Vol 11, No 6 (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.1993.11.6.217-221

Abstract

The aim of this experiment is to investigate the use of minalith as fire retardant which is able to reach the higher grade of fire resistance for karet (hevea brasilliensis), meranti merah (shore asp.) and tusam wood (pinus merkusii). The minalith protection on wood was done at 15%, 19% and 23% concentrations by hot soaking at 60-70°C for 6 hours, followed by cold soaking at room temperature for 5 days periods. The characteristics tested were retention, heat release, smoke density and temperature deviation.The result showed that the highest retention was obtained from meranti merah (41.0 – 59.9 kg/m3) and the lowest one was from tusam (37,0 – 47.2 kg/m3). Higher concentration on each wood species produces higher retention. In terms of smoke density and temperature deviation, the difference was very significant between non-protected wood. Heat release of protected tusam was the best (4 - 139°C minute). At 19% and 23% minalith concentrations, tusam showed the quality on fairly combustible while other protected wood were on fire retarding and fairly retarding classification. The highest fire resistance properties was shown by tusam at the 23% minalith concentration.
ASPEK KELEMBAGAAN DALAM PEMBANGUNAN HUTAN TANAMAN (Some institutional aspects in developing forest plantation) Sianturi, Apul
Jurnal Penelitian Hasil Hutan Vol 11, No 6 (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.1993.11.6.241-247

Abstract

Forest as one of natural resources should be managed on sustainable bases for the prosperity of the people. As the number and the income of the people increasrd, the needs or demand for forest products also increased. On the other hand, the increase in population stimulates the decrease in forest land  areas. To solve this problem there is a need to increase or optimize the production of forest lands so that the decrease in forest areas does not mean the decrease in forest products.One of the solutions is to establish forest plantations on degraded lands, and to convert natural forests which are less productive to forest plantations which are more productive. Reforestation of degraded forest requires a lot of capital, and financially not profitable, therefore it needs a subsidy, Since degraded forest is not profitable and the locations are scattered in small areas, State Owned Enterprice (BUMN) or Forest Service (Dinas Kehutanan) should do reforestation on these areas. On the other hand conversion of natural forest to forest plantation is financially profitable, therefore it does not need subsidy and can be done by private industry, For this purpose the master plan of natural forest that could be converted to forest plantation should be well prepared. Institutional aspects of these two types of forest plantations are discussed in this report. 
PENGARUH EKSTRAKSI DAN PENGERINGAN TERHADAP DERAJAT PEMBAHASAN PERMUKAAN DAN KETEGUHAN REKATAN KAYU (The effect of extraction and oven-drying on wood surface wettability and bond strength) Balfas, Jamal
Jurnal Penelitian Hasil Hutan Vol 11, No 6 (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.1993.11.6.222-227

Abstract

Wood blocks measuring 10 min (radial) x 25 mm (tongitudinal) of regrowth karri (eucalyptus diversicolor F. musfi.) and jarrah (E.marginata ex sm.) were used in this study. The extraction treatment was preceded by a preliminary experiment to determine the effect of extraction on percentage weight loss of wood blocks and extractive yield. Five extraction times were used, 8,16,32,64 and 128 hours, further experiments were undertaken to investigate the effects of oven-drying hot-water extraction an a combination of the two treatments on wattability and shear strength of karri and jarrah laminates, panels were made by gluing pairs of laminates with resorcinol formaldehyde at a spread rate  of 1.2 mg/mm2. The preliminary experiment showed that water soluble extractives removed from wood blocks increased with increasing time of extraction. The amount of extractives removed was approximately three times greater is karri than in jarrah. Extending the extraction period beyond 32 hours resulted in collapse, bowing and checking of the wood blocks during drying. Results from the initial experiments revealed that either oven drying, extraction or the combination of the two treatments have all significantly (p<0.01) reduced wettability and shear strength of the wood laminates. There was no significant relationship between wettability and shear strength for both regrowth eucalyptus.

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