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Jurnal Penelitian Hasil Hutan
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Search results for , issue " Vol 4, No 3 (1987): Jurnal Penelitian Hasil Hutan" : 10 Documents clear
INTENSITAS TEBANG BAYANG OPTIMUM DALAM PEMELIHARAAN JALAN HUTAN Dulsalam, Dulsalam; Suparto, Rahardjo S
Jurnal Penelitian Hasil Hutan Vol 4, No 3 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3545.234 KB) | DOI: 10.20886/jphh.1987.4.3.45-48

Abstract

Forest roads requires lots of sun and air to keep them dry. These can be obtained by  "shade felling"  of the stand at both sides OJ the road. The problem in this matter is the question  about  the proper felling  intensity  to render adequate sunshine  and air without  undue  overcutting.Logging companies  tend to fell  as many  trees as possible  to ensure enough  opening  to let sunshine  and air in.A  Least  Significant  Difference  (LSD)  test on the data  obtained from the observation  indicate  that felling  intensity  over 50%  does not provide  better result than 31-41%. It is therefore suggested that shade felling intensity  be kepi at 40%  or less to save time,  man power, cost and forest  resource.
ANALISIS KIMIA DUA PULUH TUJUH JENIS KAYU JAWA BARAT Purba, Kayano; Sumarna, Endang
Jurnal Penelitian Hasil Hutan Vol 4, No 3 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3085.103 KB) | DOI: 10.20886/jphh.1987.4.3.26-29

Abstract

Chemical analyses of wood species from different islands of Indonesia has been started by several workers. Most of the species studied were obtained from East Kalimantan, South  Kalimantan,  Central Kalimantan, East  Java  and  South   Sumatera.  The  analyses comprised the determination of cellulose, lignin, pentosan, ash, extractives and the solubility in one percent of sodium hydroxide. These analyses were conducted to determine their basic characteristics and ultimate uses of the wood. In this report the result of chemical analyses of 27 wood species from  West Java are presented as supplementing reference to the previous ones.The analyses reveal that the cellulose content ranges from  40.99-55.54 percent, pentosan from  12.49-19.54 percent and lignin from 17.20-28.86percent.The ash and silica content vary considerably from 0.19-1.43 percent and from 0.05-0.79 percent, respectively.The solubility in cold water varies from 0.11-7.20 percent, in hot water from 2.18-10.44 percent, in alcohol benzene (1 : 2) from 0.54-8.70 percent, and in one percent sodium hydroxide solution from 11.01-37.94 percent.
SIFAT PENGERINGAN ALAMI DAN DEHUMIDIFIKASI BEBERAPA JENIS KAYU INDONESIA Hidayat, Syarif; Karnasudirdja, Suparman
Jurnal Penelitian Hasil Hutan Vol 4, No 3 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3110.858 KB) | DOI: 10.20886/jphh.1987.4.3.41-44

Abstract

This paper presents results of laboratory study  on the rate of moisture  content  decrease of 19 timber species.  The test specimen from each species were subjected  to air drying under sheltered condition  (under roof) and drying in a dehumidifying chamber.  At the end of each test.  the defect of each specimen  was recorded, and the most appropriate form of relation between duration  of drying and moisture  content  decrease was sought.From data analysis it was shown that a power form of relationship (Y = aXb) was reasonable, with coefficient  of correlation values varying between  0.80-0.90.The result also shows  that the longest air drying time (from 60% to 20%  moisture  content)  was recorded by kayu besi (53 days) and the shortest  by dama-dama  and palapi  (18 days).As  has been anticipated,  drying  in the dehumidifier   has reduced  considerably  the time  required for  drying from 60% to 20% moisture content. For example for the three species mentioned  above  the figures  were 20 days for  kayu  besi and 5 days for  dama-dama  and palapi.The result shows further  that severe defect was observed in kolaka,  bugis, suling and belu itam.  The remaining species have either moderate or slight defect.
PEMBUDIDAYAAN JAMUR TIRAM PUTIH (PLEUROTUS OSTREATUS) DENGAN MEDIA LIMBAH KAYU Suprapti, Sihati
Jurnal Penelitian Hasil Hutan Vol 4, No 3 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3063.116 KB) | DOI: 10.20886/jphh.1987.4.3.50-53

Abstract

Wood waste such as sawdust, leaves of legume plants  such as turi (Sesbania  grandiflora  Pers.) and lamtoro  gung (Leucaena   leucocephala (Lam.)  de Wit.)  were used as substrates for  oyster mushroom,  Pleurotus  ostreatus  cultivation. The substrate consisted of rubber wood sawdust (Hevea brasiliensis Muell. Arg.) mixed  with turi  or lamtoro gung leaves containing  50%, 100%, 150%, 200%, by weight and distilled  water. The substrate was allowed to cool after autoclave sterilization  before  being inoculated  with pure  culture oyster  mushroom.The mushroom was harvested  every day after  the growth  of the fruiting body. The average yield  of  the entire  treatments  was 643.00 g (532. 29- 744. 69 g) per kg of dry weight of substrate.  The highest product  was obtained from  rubber wood sawdust substrate  mixed  with 10% turi leaf.
CAMPURAN SAGU DAN ILES-ILES SEBAGAI EKSTENDER PEREKAT UREA FORMALDEHIDA KAYU LAPIS Sumadiwangsa, Suwardi; Hadi, Yusuf Sudo; Simanjuntak, Jhon Novarly; Kliwon, Suwandi
Jurnal Penelitian Hasil Hutan Vol 4, No 3 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5144.893 KB) | DOI: 10.20886/jphh.1987.4.3.30-35

Abstract

In 1984 Indonesia required more than 64.000 ton of wheat flour for  extender  of urea formaldehyda   (UF) adhesive in plywood  industry.  It is considered more economical  when the wheat flour  can be substituted  by locally available carbohydrate  such as sago (Metroxylon  sp.). However, sago alone gives poor quality  as an extender  of  UF adhesive.Iles-iles (Amorphophallus oncophyllus)  is another potential source of carbohydrate.   This contains  more protein  and mannan  than that  of wheat flour. Therefore, it is deemed necessary to explore the posisibility  of mixing sago and iles-iles as a combined  substitute  for  wheat flour  as extender  of  UF adhesive.This work is intended to obtain optimal ratio of sago and iles-iles formulation,   and then to compare its performance  with that of wheat flour extender.  This study comprise of 5 levels of sago and iles-iles mixed and 3 levels of flour  extender, each of which were having 5 replicates aplied for plywood  adhesion.The 713 ratio of sago and iles-iles is the same as, if not better than, wheat flour  extender.  The extender content  (X) and plywood  bonding strength (Y) for  each of  the extender  was linearly correlated.  It is interesting to note  that  the 614 ratio gives  very small slope (B) in its linear regression, in contrast  to the others.Although  the price of iles-iles was comparable to the wheat flours, the lles-iles gives higher bonding strength  at lower proportion  compared with that of  the wheat flour  extender. 
SIFAT PEMESINAN JENIS KAYU JAWA BARAT Rachman, Osly; Balfas, Jamal
Jurnal Penelitian Hasil Hutan Vol 4, No 3 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6904.576 KB) | DOI: 10.20886/jphh.1987.4.3.54-64

Abstract

 This paper presents  the result of test on machining properties  of 28 wood species from  Bogor and Sukabumi, West Java.  The test method used was the modified  ASTM  D-1666 described in the Forest Products  Research Institut  Report No.  160 (1982).   The samples  (25 pieces/species) were dried  to equilibrium moisture  content condition (15  to  18%).  The machining  properties   investigated   were planning, shaping, boring, mortising,  turning and sanding.The species that have good or very good machining properties  are kobari, pasang jambe,  pasang beureum,  mahoni  daun lebar, pentadesma, cloropora,  eucalyptus,  meranti  batu,  pinus  I, mahoni,  mahagoni  and pinus  III.  Species such  as kelumpang,  entorolobium   and  cecropia  are consistenlly poorer. The other species are good in some properties  and fair or poor  in others. 
PERUBAHAN PENGGUNAAN LAHAN HUTAN SEKITAR SUNGAI KAMPAR, RIAU Sumantri, Ishak; E, Machfudh Wesman; Haryono, Haryono
Jurnal Penelitian Hasil Hutan Vol 4, No 3 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5265.407 KB) | DOI: 10.20886/jphh.1987.4.3.10-16

Abstract

This study is to evaluate the trend of forest  land-use change as a result of  the communitys   activities in pursuing  its need for settlement  and land cultivation  in forest  land in the vicinity of Kampar  river, Riau. To understand the trend of forest  land utilization change, 4 data resource references including aerial photo 1964, general view of 1974 forest  map,  1982 land use map, and a ground  check in 1984, have been used. During two periods i.e., in the years from 1964 to 1974, and from  1974 to 1984, it is known  that an invation  occured into both limited production  forest and conversion forest  in the Sub Districts of Kampar Kiri and Sengingi. An analysis of data, using "population  pressure"  and  "location-quotient formulation"  technique shows  that population  pressure  and low income  causes invation  into  the forest  areas
PENGAWETAN SEPULUH JENIS KAYU IRIAN JAYA SECARA DIFUSI Abdurrohim, Sasa; Martawijaya, Abdurahim
Jurnal Penelitian Hasil Hutan Vol 4, No 3 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7045.055 KB) | DOI: 10.20886/jphh.1987.4.3.65-70

Abstract

The result of dip diffusion treatment  of ten wood species from lrian Jaya is reported in this paper. The wood species comprised  among others wafut (Cananga odorata Hook.f.  et Th.), starka (Octomeles sumatrana Miq.), senai (Dracontomelon mangiferum Bl.), sutiet (Spondias cytherea Sonn.), bemoe (Canarium indicum L.), raja (Pterygota forbesii F.v.Muell), sehiega (Celtis latifolia Planch.), sehiye (Sterculia macrophylla Vent.), susu (Alstonia scholaris R.Br.), and bimiek (Pterocymbium beccarii K. Schum.).  Particular  attention is directed to penetration  and retention requirement/or wood uses under roof and outdoor without soil contact. Solution concentration of BFCA preservative used was 30 percent.Among ten wood species tested, only one species (sehye) could not be treated by dip diffusion process in 30 percent solution, because retention requirement for  use under roof without soil contact (condition A) could not be reached.  Two of the remaining nine wood species which could be treated by dip diffusion process and hence fulfilling the requirement for uses under condition B were raja and sehiega woods.Storage phase proposed for bemoe, raja and sehiega wood is 8 weeks, while for six other wood species ( wafut, stark a, senai,  sutiet, susu and bimiek) is 4 weeks.During storage phase, severe attack of blue-stain on seven wood species  were observed, while the remaining three species which were not affected were senai, sehiega and bimiek wood. An addition of anti blue-stain compound in the preservative  is recommended 
PENGARUH FREKUENSI MAKAN TERHADAP JAM KERJA PENEBANG JATI DI KPH JOMBANG Idris, Maman Mansyur; Suhartana, Sona
Jurnal Penelitian Hasil Hutan Vol 4, No 3 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2483.983 KB) | DOI: 10.20886/jphh.1987.4.3.17-20

Abstract

One of heavy work in the forestry activity in Indonesia  is manual  tree felling  of the teak.  This work needs much physical  labor.  Grandjean (1982) states that an extreem  physical  exertion  needs energy about  4,500 kcal/day.In order to continue  teak production it is needed to improve welfare of  the laborer by giving a better nutrition.A study  was conducted  to evaluate the effect of calorie intake on the performance  of the laborer and data were analyzed by using tabulation. The result showed that eating frequency are highly significant for teak tree fellers productive  working hour, age group of  18-40 years  with their average productive  working hours were 5 hours, 9 minutes and 29 seconds for  two times eating  frequencies.  Further  the average of 6 hours, 21 minutes and 41 seconds for  three times eating  frequencies,  and for age group 40 years up were 4 hours, 37 minutes and 25 seconds for  two times eating frequencies  and 5 hours,  10 minutes  and 36 seconds for  three times eating frequencies 
SIFAT PAPAN WOL KAYU DARI 19 JENIS KAYU SULAWESI TENGAH Sulastiningsih, l M; Sutigno, Paribotro; Memed, Rozak
Jurnal Penelitian Hasil Hutan Vol 4, No 3 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3253.673 KB) | DOI: 10.20886/jphh.1987.4.3.21-25

Abstract

The results of laboratory test on the properties  of wood-wood  boards manufactured  from  19 individual  wood species obtained from  Central Sulawesi province  are reported in this paper.  The tests comprised board density,  moisture  content, thickness  reduction  due to compression  and bending strength.The results show an average yield  of  wood-wool  is 238 kg per cubic  meter  of  log  input.   Four wood  species  required presoaking  for wood-wool  making.  The physical  and mechanical properties  of  the wood-woo/  board  made from  seven wood species mineralized  with CaCl2 solution or Ca(OH2) suspension  meet DIN 1101 standard. 

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