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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
 96   97   98   99   100 
PERILAKU PENGGEREKAN DAN PERKEMBANGBIAKAN KUMBANG AMBROSIA PLATYPUS TREPANATUS PADA DOLOK RAMIN P Sukartana
Jurnal Penelitian Hasil Hutan Vol 4, No 2 (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.1987.4.2.30-35

Abstract

The tunneling and breeding habits of ambrosia beetle Platypus trepanatus  Chapman  (Coleoptera: Platypodidae)  were studied  in the field for 26 days after  initial burrowing.The tunneling  is initiated  by the male beetle, commenced  hours after  the ramin tree (Gonystylus  bancanus  Kurz.)  is felled.  As the beetle tunnel about twice its body length,  the burrowing is stopped,  and the beetle, then, remains inside near the entrance hole to entice  the female  beetle for  joining.After arriving, the female  beetle takes over the tunneling extension.  The male, on the other hand, occupies the initial tunnel, builds a circular fibrous  plait  ringed at the entrance hole, and cleans the tunnel  by ejecting frass outside. An established  tunnel  is determined  by  the ejection  of coarse frass  first  and  the fine  other then.  A successful  tunneling  (broods)  seems  to be attributable  to the parent  beetles care.The beetle tends to burrow  the log across the grain.  The first tunneling  is radially, but by the day about  12, it has significantly  curved.  The speed of tunneling  is approximately  4.47 mm  while the depth  of its penetration   is about  2.56  mm per  day.The oviposition  is firstly  recorded between  the day 2-8 at the length of tunnel 9-25 mm. The egg stadium  is about  two weeks.  No pupation was shown  during  these 26 day studies.Statistical  computations   reflect  that the tunneling  and oviposition  were still continued  after  these observations
PENGARUH LAMA PEMASAKAN BIJI TERHADAP RENDEMEN DAN SIFAT FISIKO-KIMIA MINYAK KEMIRI Erra Yusnita; B Wiyono; Hartoyo Hartoyo
Jurnal Penelitian Hasil Hutan Vol 19, No 1 (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.2001.19.1.1-8

Abstract

Kemiri (Aleuritus mollucana Willd) plants are widely distributed in the tropical and sub tropical regions. Meanwhile, kemiri plant grows vastly almost anywhere in Indonesia. Kemiri nut meg can be used not only as food-seasoning, ingredients but also as a traditional medicine. The kernel portion of kemiri nut has high nutrition and energy (calorific) values, and so does its oil. The nut, is the meat part after removing the kemiri thell, could is further produced oil after having undergone certains extractions process.Kemiri nut oil has such specific characteristics that being easily dried under open air. Therefore, this oil can be used as volatilizing agent in the manufactures of paint and varnish.In addition, the properties of kemiri nut oil are affected by its extraction methods and quality of its raw material (kemiri nut). In this regard, the study is conducted to learn the effect of cooking duration on the yield and physico-chemical propertiesof the resulting oil. The aim of this study is to find out the optimal cooking duration capable of producing oil with satisfactory qualities.The results reveal that increase in the cooking duration are affected significantly the yield, specific gravity, light transmittion, free fatty acid (FFA) content, and iod number of the oil. Cooking duration for 30 minutes turned out to give optimum condition with respect to oil properties, i.e. yield at 49,94%, iod number = 158.657; FFA = 1.1399; specific gravity = 0.9211, and transmittion = 70.43.Keywords : yield, physico-chemical properties, cooking duration.
ELASTISITAS DAN EFISIENSI BEBERAPA FAKTOR PRODUKSI PADA KILANG KAYU LAPIS DI SUMATERA DAN KALIMANTAN Akub J Abdurachman; Kirsfianti L Ginoga
Jurnal Penelitian Hasil Hutan Vol 6, No 3 (1989): 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.1989.6.3.182-186

Abstract

The study of the elasticity and efficiency of several production factors of plywood mills was carried out at 14 plywood mills in Sumatra and Kalimantan. The result of analysis revealed that the value elasticity of four production variables i.e installed capacity (X1), number of administration labor (X2), number of technical labor (X3) and the number of raw material (X4) as follow O,7213; 0,0647; 0,0375 and 0,2906. It is shown that the elasticity of each production variable is still low. The ratio of marginal product value over marginal cost of variable X2, X3 and X4 are follow 0,856; 0,510 and 1,755, respectively. Therefore, the economic efficiency of production variables at 14 plywood mills in Sumatra and Kalimantan is not reached.
TEKNIK PENGOLAHAN GAMBIR DI DESA SIAMBALIANG, KABUPATEN DAIRI, SUMATERA UTARA Santiyo Wibowo; Totok K Waluyo
Jurnal Penelitian Hasil Hutan Vol 23, No 1 (2005): 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.2005.23.1.43-52

Abstract

Gambir (Uncaria gambir Roxb.) merupakan salah satu hasil hutan bukan kayu yang penting di Indonesia, digunakan secara tradisional untuk berbagai tujuan seperti campuran makan sirih, obat, industri tekstil dan kulit, Salah satu sentra produksi gambir di Indonesia adalah Kabupaten Dairi, Propinsi Sumatera Utara. Penelitian ini bertujuan mendapatkan informasi tentang teknik pengolahan gambir di Desa Siambaliang, Kabupaten Dairi, Sumatera Utara yang dilaksanakan pada bulan Desember 2002 dengan menggunakan rnetode deskriptif. Hasil penelitian menunjukkan bahwa pengolahan gambir dilakukan dengan teknik yang sederhana dan tradisional, rendemen yang dihasilkan antara 4,2-4,8% dengan rata-rata 4,6%.
ANALISIS BIAYA DAN TENAGA KERJA PADA BEBERAPA KILANG PENGGERGAJIAN DI SUMATERA SELATAN Sylviani Sylviani; Akub J Abdurachman
Jurnal Penelitian Hasil Hutan Vol 7, No 4 (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.1990.7.4.150 - 155

Abstract

The result of research on several sawmills in South Sumatera  showed that average   level of manager productivity is 7.563 Cu.m/man/annum, administration productivity is  3.220 Cu.m/man/annum, tecnician productivity is 74 Cu.m/man/annum. Average labor   requirements are 9 men/1.000 Cu.m  of  the  design  capacity  and  10  men/1.000 Cu.m  of  raw material.Cost of  production of  sawntimber   showed  an average  of  Rp  184.808,-/Cu.m, in which  the processing  cost  alone ranked  high  up  to an average of  83 %, marketing  cost 10 %,  and general cost  7 %. Profit  generated of  each  mill per annum  ranged from  Rp 891.060.692,- to Rp  3.165.279.700,- or equivalent   to an average  of  Rp  80.053  per  Cu.m.
INTENSITAS DAN TIPE SERANGAN PENGGEREK KAYU DI PERAIRAN PULAU RAMBUT DAN PUNTUNG JAWA Mohammad Muslich; Ginuk Sumarni
Jurnal Penelitian Hasil Hutan Vol 5, No 3 (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.1988.5.3.118-122

Abstract

One  hundred   fifty   pieces  of  wood  consisting  of  15 species  were randomly   arranged in form  of  a raft and  floated at Rambut and Puntung  Java Islands seashore. The size of the wood  specimens  is 2,5 cm x 5 cm x 30 cm.                      The  samples  were  tested  against  two  principal  family of  marine  borers,   i.e.   teredinids  and pholads  and  evaluated after three  months. The  results  reveal that  most  of  the  tested  woods  were severely  attacked  by  teredinids,  except   Heritiera  littoralis, Heritiera javanica, Diospyros celebica, and  Eucalyptus platyphylla, but  these  species  were severely  attacked by pholads.  The infestation has two distinct  types,  characterited by its structure  and pattern  of  wood  boring
PENENTUAN NILAI MANFAAT EKONOMI TAMAN NASIONAL GUNUNG GEDE PANGRANGO SEBAGAI TEMPAT REKREASI Rabayu Supriadi
Jurnal Penelitian Hasil Hutan Vol 13, No 5 (1995): 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.1995.13.5.196-214

Abstract

Indonesian economic growth as reflected by increase of per capita income, improvement of physical infrastructure and facilities as well as socio-economic and political condition have resulted in the increase of recreation demand. The Gede Pangrango Nasional Park is an example of such a forest recreation site with indigenous and exotic flora and fauna, its natural landscape of great beauty and other attractiveness and facilities could stimulate the visitors. As the park is easily reached from the surrounding cities like Jakarta, Bogor, Cianjur, Sukabumi and other cities of Java it seems that demand for recreation in this park is considerably increasing.The objectiveof this study are to get a better insight into the socio-economic aspect of the recreation in the park and to demonstrate the use of internationally accepted method, namely Travel Cost Method, to measure the economic value of the park.The demand equation and demand curve, the annual benefits (consumer's surplus). and the present value of the park have been estimated. The application of the Travel Cost Method (TCM) as a result of this study indicates that the participation rate of the recreation is 2,238 visitor per million inhabitants. The relationship between participation rate (V/P) and directc travel and time cost (TC) can be derived from the demand equation: V/P= -62,5 + 1675240/ TC2 with determinant coefficient, R2= 0.6362. This equation gives the estimated value of the annual benenfits of Rp 1.389 billion or an estimated value of Rp 17,370,- per visit. This is the amount of visitors' willingness to pay on average beyond what they actually pay. This amount gives also a present value of the park of Rp 25,55 billion as the economic value of the park providing recreational opportunity. This figure is based on the assumption that actual visit to the park continues to grow with 6.5 percent annually during the next 30 years and a discount rate of 10 percent, the time value is 50 percent of the hourly income, and are excluded extra cost likefor lodging and the equipment of tents. There will be upward bias due to multi-site visit, and downward bias because of visitors measure rather than day-visit.The expected increase in the number of visitors will place a tremendous pressure on the management of the park. Therefore,improved planning and management activities are needed. This will require an increase of the budget for planning and management to prevent a degradation of the attractiveness of die park. A degradation will mean that the park will lose its high economic value. Further study is recommended to get a more accurate figure of the economic value of the park by inclusion of substitute recreational site, multi-site visit, on-site travel time cost, and all expenses of visitors spent in the estimation of the benefits. 
PROSPEK AGROINDUSTRI SAGU DI SUMATERA BARAT KHUSUSNYA DI KEPULAUAN MEBNTAWAI Gusmailina Gusmailina
Jurnal Penelitian Hasil Hutan Vol 10, No 6 (1992): 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.1992.10.6.222-226

Abstract

The potential of sago forest  in Menlawai lslands has not yet been optimally exploited either as raw materia for  industry and as food sources.  This article  is based on survey  carried out in Mentawai islands, Wert Sumatera, on June  1991.40 %  of Mentawm lsland are swamps  and peals which the only possible exploitation of the area is through sago cultivation, that will produce sago as raw material for agroindustry.sago is abundantly avaiqble in the Mentawai Islands.  Since man power and market, are no longer a problem, it is expected that sago industry  would have a good prospect in the future.The lslands could pioneer  the  improvement of  sago processing from  traditional method  to  a  relatively  modern  way.  Hence,  indirectly it would speed up the rate of economic development in the area.
PEMBUATAN ARANG AKTIF DARI TANDAN KOSONG KELAPA SAWIT Djeni Hendra; Gustan Pari
Jurnal Penelitian Hasil Hutan Vol 17, No 2 (1999): 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.1999.17.2.113-122

Abstract

Dalam tulisan ini dikemukakan hasil penelitian pembuatan  arang aktif dari tandan kosong kelapa sawit yang  berasal dari pabrik minyak kelapa sawit Malingping, Banten.  Tujuan dari penelitian ini adalah untuk mempelajari pengaruh  suhu aktivasi dan konsentrasi bahan pengaktif yang optimal. Proses pembuatan arang aktif dilakukan dengan menggunakan retort pada suhu aktivasi 7500C, 8000C, 8500C dan  9000C. Sebagai  bahan pengaktif digunakan  larutan NH4HC03dengan  konsentrasi 0,10 %, 0,25%, 0,50 % dan tanpa bahan pengaktif. Hasil penelitian menunjukan bahwa kualitas arang aktif yang terbaik untuk dipakai dalam pemurnian larutan yang terkontaminasi adalah arang aktif  yang dibuat dengan perlakuan suhu aktivasi 800°C dan konsentrasi bahan pengaktif  0,50 % dengan hasil daya serap terhadap iodium 770, 75 mg/g dan memenuhi Standar Nasional Indonesia. Untuk penyerapan gas, kualitas arang aktif terbaik adalah yang dibuat dengan  perlakuan suhu aktivasi 8500C dan konsentrasi bahan pengaktif 0,50 %, di mana hasil daya serap terhadap benzena sebesar 37,83% dan lebih besar dari daya serap terhadap benzena yang dipersyaratkan oleh Standar Jepang.
PENDUGAAN KEPEKAAN KAYU KARET TERHADAP SERANGAN KUMBANG AMBROSIA Paimin Sukartana
Jurnal Penelitian Hasil Hutan Vol 5, No 7 (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.1988.5.7.417-419

Abstract

 An  experiment   to  assess  the  susceptibility  of  rubber wood   (Hevea  brasiliensis)  to  ambrosia  beetle  infestations   was conducted   in a rural area,  near a rubber  plantation   in Jasinga,  Bogor. Fresh cut  rubber wood, each of  75 cm in length  1:1 and of  about  25  cm  in diameter, were prepared  for four  treating  conditions   including  freshly   cut, debarked,   and coated  with flint  kote,  and  (in a prepared  bore hole  made  on  the  middle  of  test  logs with  2.5 methanol   96%. The  extent  of the  beetle  infestations were  then  observed  and  recorded.The  test  results  revealed  that  the  degree of  rubber log susceptibility   to ambrosia  beetle  infestations   was affected   by the  treatments.  The  debarked   logs  were  highly   infested   by  the  beetles  in  less than  nine days  after  the  treatment   while the  un barked  ones  were still  soundly   left  in  the  field  for  more  than  one  month.   Significant   increase  in  log susceptibility due  to  the  treatments   with  ethanol   and  flint   kote  was also recorded  even  though  the  beetle  infestations   were not so high then  those  on  the  debarked  ones.

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