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Jurnal Penelitian Hasil Hutan

JPHH
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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

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INTENSITAS TEBANG BAYANG OPTIMUM DALAM PEMELIHARAAN JALAN HUTAN Dulsalam Dulsalam; Rahardjo S Suparto
Jurnal Penelitian Hasil Hutan Vol 4, No 3 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

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.

SIFAT PULP SULFAT KAYU KURANG DIKENAL ASAL JAWA BARAT Rena M Siagian; Setyani B Lestari; Yoswita Yoswita
Jurnal Penelitian Hasil Hutan Vol 22, No 2 (2004): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

This paper deals with the results of a laboratory-scale manufacture of sulphate pulp from lesser known wood species from West Java in the possible utilization as a raw material for pulp with the emphasizes on yield, pulp processing properties and physical properties. There arefive wood species experimented, i.e. marasi (Hymenaea courbaril L.), asam jawa (Tamarindus indica L.), balobo (Diplodiscus (?), kundang (Ficus variegata Bl.) and kendal (Ehretia acuminata R.Br.).The results revealed that marasi, asam jawa, kundang, and kendal wood species could produce pulp with the yield commonly in the range as obtained from sulphate process, i.e. 40 - 55 percent. The lowest pulp yield (less than 40 percent), however, was obtained by balobo species. The favorable delignification with the low Kappa number in the resulting sulphate pulp only occurred to asam jawa wood species. Meanwhile, the other four wood species in the sulphate process proceeded with less favorable delignification and concurrently produced pulp with high Kappa number.When viewed from the pulp yield, Kappa number, and active alkali consumption, only asam jawa wood species seemed suitable for producing bleached pulp. Conversely, the other four species appeared to be unsuitable for bleached pulp. To acquire their suitability, hence, those four species should be cooked in the sulphate process under a more enhanced condition.The properties of the unbleached pulp from those five wood species were in the ranges of 42 -61 Nm/g for tensile index, 6.52 - 12.38 Nm2/kg for tear index, 2.47 - 3.20 KPa.m2/g for burst index, and 3.64 - 8.16 df for folding endurance.Viewed from physical properties that covered tensile, burst, and tear index, it turned out that balobo-wood (Diplodiscus (?)) pulp afforded the highest physical properties followed by those of kundang (Ficus variegata Bl.) and marasi (Hymenaea courbaril L.) wood species. Meanwhile, the lowest physical properties of the pulp sheet were obtained from asam jawa (Tamarindus indica L.) and kendal (Ehretia acuminata R.Br.) woods.

PENGOLAHAN DEKSTRIN SAGU (METROXYLON RUMPHII) SECARA ENZIMATIS R Sudradjat; Erra Yusnita
Jurnal Penelitian Hasil Hutan Vol 20, No 1 (2002): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Sago tree (Metroxylon rumphii) is a potential source of starch and an important contributor of non timber forest products for foodstuff reserve because it has a high carbohydrate content particularly starch. The idea of converting sago starch into dextrin compound is to enhance wider use and increase the economic value of the this commodity. Dextrin has been known for its use as additives in textile industries, pulp/paper industries and pharmaceutical industries.A laboratory trial has been conducted to convert sago into dextrin harnessing the activities of particular enzymes. The aim of this trial was to figure out optimum condition of enzymatic 'sago-processing into satisfactory-quality dextrin, able to comply with the requirement of Indonesian National Standard (INS). The target is to obtain appropriate technology development in sago-derived dextrin.The result revealed that the optimum condition was obtained at substrate concentration of 25 percent with enzyme dosage at 0,9 gram per kg of substrate (dry-weight). In this condition, the dextrin solubility complies with the INS requirement; i.e 25 percent with enzyme dosage at 0,5 gram per kg of substrate (dry- weight).

FINANCIAL ANALYSIS OF PUJON SOCIAL FORESTRY PROJECT IN EAST JAVA, INDONESIA Linda Ginoga
Jurnal Penelitian Hasil Hutan Vol 12, No 6 (1994): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Penelitian ini menganalisis aspek finansial proyek Perhutanan Sosial (PS) di Pujon, Jawa Timur. Analisis finansial ini dilakukan untuk mengetahui kelayakan finansial proyek PS, yaitu biaya dan penerimaan proyek berdasarkan harga pasar.Hasil analisis finansial menunjukkan bahwa dengan tingkat discount rate 16 persen, proyek PS memberikan nilai net present value (NPV) pada Perum Perhutani sekitar Rp 2.9 juta per hektare (harga tahun 1993). Surplus finansial ini terutama diperoleh dari hasil penjualan tanaman pokok (Agathis lorantifolia). Sedangkan tingkat penerimaan finansial untuk Perum Perhutani diperkirakan sebesar 27.8 persen. Karena itu dari pihak Perum Perhutani, proyek PS secara finansial adalah layak untuk dilaksanakan.Pihak petani peserta memperoleh nilai NPV sebesar Rp 7.2 juta per hektar, jauh di atas nilai NPV yang diterima oleh pihak Perum Perhutani. Tetapi dengan tingkat perolehan lahan rata-rata seluas 0.19 ha per keluarga, dan dengan asumsi setiap keluarga terdiri dari 5 orang, petani hanya memperoleh sekitar Rp 280,000 per keluarga atau Rp 56,000 per kapita. Di samping itu, pendapatan petani per tahun dari proyek PS juga tidak stabil. Periode tahun ke 4 sampai tahun ke 9 dan tahun ke 21 hingga akhir proyek (tahun ke 35) merupakan masa krisis proyek, dari se-gi pendapatan petani.

PENGARUH PRAHIDROLISIS TERHADAP KUALITAS PULP RAYON ACACIA MANGIUM WILLD Rena M Siagian; Jefri R S; Bedyaman T; Kayano Purba
Jurnal Penelitian Hasil Hutan Vol 6, No 4 (1989): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Rayon grade pulping trials from Acacia mangium Willd have been studied with variation in pH and prehydrolysis time.Sulphuric. abid, water and sodium hydroxide were used as prehydrolysing agent at pH 4, 7, and 10 each were prehydrolized.for 30,and 60 minutes at 160°C. Following the prehydrolysis, the suphate pulping was conducted by using the active alkali 16%, sulphydity 25%. The maximum temperature was 170°C maintained for 90 minutes. The resulting pulps were bleached by C-E-H-E-H bleaching system and finally acidified with hydrochloric acid.The yield of unbleach pulp ranging from 37- 43% and permanganate number from 8.5 to 10.4.The increase of the prehydrolysing pH from 4 to 10 will decrease alpha cellulose content and viscosity while the beta, gamma cellulose content and alkali solubility tend to increase.The pulping trials under prehydrolysis pH 4 for 60 minutes of Acacia mangium gave the best alpha cellulose yield and lowest hemicellulose and ash content.

ANALISIS KOMPONEN KIMIA MINYAK KAYU CENDANA DENGAN KROMATOGRAFI GAS Abdul Hakim Lukman; Bambang Wiyono
Jurnal Penelitian Hasil Hutan Vol 5, No 7 (1988): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

The purpose of this research is to identify chemical components of sandalwood oil by using the gas chromatography method. This sandalwood oil was obtained by steam and water distillation for 18, 24, and 30 hours distilling times. The condition of the gas chromatography employed was adjusted to : injector temperature 200° C. detector temperature 0° C, initial column temperature 140° C, final temperature column 200° C, speed temperature column 5° C/min, with nitrogen gas as carrier, and the using the flame ionization detector system. The identification of the peak components was done by comparing the relative retention time of the peak component with the peak retention time chemical solution standard. The peak area of each components was calculated by normalization method.The results indicated that chemical components of sandalwood oil, which was produced by the steam and water distillation for 18, 24, and 30 hours, include 0.0391, 0.0271, and 0.0313 % of α-pinene; 0.0065, 0.0034, and 0.0027 % of limonene; 0.9147, 0.7799, and 1.0393 % of α-santalene; 2.4375,1.9802, and 2.3474 % of terpineol 4; 1.2184, 0.7922, and 0. 7921 % of β-santalene; 5. 7263, 3.8800, and 3.9335 % of nerolidol; 48.0481, 51.1802. and 50.3507 % of β-santalol; 22.4367, 24.7127, and 24,2864 % of (arnesol, Unidentified component in each distilling time were 19.1727,15.6443, and 17.2166 %. respectively. The β -santalol component occupies the mayor component of sandalwood oil. The amount of this component at each treating condition was 48.0481 % for 18 hours; 51.1802 % for 24 hours; and 50.3507 % for 30 hours. Terpineol-4, nerolidol, β-santalol. and farnesol components constitute the sandalwood oil and is usually calculated as the total santalol.

PRODUKTIVITAS DAN BIAYA REKAYASA MESIN PEMBUAT SERPIH KAYU YANG MUDAH DIPINDAH Wesman Endom
Jurnal Penelitian Hasil Hutan Vol 31, No 4 (2013): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Sebuah alat pencacah kayu mudah pindah telah dibangun dengan tujuan untuk membuat serpih dari limbah tebangan berdiameter di bawah 20 cm. Pengujian prototipe alat dilakukan Kampung Cipari, BKPH Sukanegara Selatan, KPH Cianjur dan di BKPH Sadang Purwakarta. Kinerja alat pencacah prototipe yang baru mampu merubah seluruh limbah menjadi serpih dengan hasil rata-rata sebanyak 582 kg/jam. Biaya pemilikan dan operasi pembuatan serpih secara keseluruhan berjumlah Rp 62.929/jam, maka biaya untuk pembuatan serpih adalah Rp 108/kg. Pada prototipe pembuat serpih Tipe-1 biaya pemilikan dan operasi adalah sebesar Rp 247/kg, oleh karena itu prototipe pembuat serpih ke dua semakin lebih baik dan biaya pembuatan serpihnya lebih murah. Dengan biaya sewa alat sebesar Rp 125/kg diperoleh NPV sebesar Rp 13.209.928 dengan IRR sebesar 30%.

PENETAPAN UKURAN SASARAN PADA LIMA UNIT PENGGERGAIIAN KAYU JATI DI JAWA TENGAH & JAWA TIMUR Osly Rachman; Sri Rulliaty
Jurnal Penelitian Hasil Hutan Vol 9, No 4 (1991): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Three teak wood sawmilis in Central Java and two in East Java have been selected for study on target aize determi- nation Using 100 board samples from each sawmill. The result was calculated using formulos for determining lumber tar get sizeThe rasult indicates that actual size produced by three sawmills were higher than target size, ranging from 0.32 mm to 2.11 mm. The actual size produced by two other sawmills was lower than the tagret size, ranging from 0.61 mm to 6.48 mnt 5.48 mm. This result indicates that target size determination is important to improve sawing efficiency.

PENGGOLONGAN PERFORMANS 25 JENIS ROTAN INDONESIA BERDASARKAN KERAPATAN, KEKAKUAN, DAN KEKUATAN Abdurachman Abdurachman; Jasni Jasni
Jurnal Penelitian Hasil Hutan Vol 33, No 4 (2015): 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.2015.33.4.273-282

Rotan merupakan salah satu hasil hutan bukan kayu, dan di Indonesia berperan penting sebab memasok 80% kebutuhan bahan baku rotan dunia. Rotan banyak dimanfaatkan antara lain untuk tali, anyaman, tikar, keranjang, perabot rumah tangga, barang kerajinan, dan produk meubelar. Pemanfaatan rotan menjadi produk berguna ditentukan diantaranya oleh kerapatan, dan kekuatan (MOR) dan kekakuan (MOE), di mana semakin tinggi nilai ketiga sifat tersebut, maka semakin baik pula kualitas rotan tersebut. Di Asia Tenggara, termasuk Indonesia, terdapat 2 dari 8 genera rotan yang bernilai ekonomi tinggi, yaitu Calamus dan Daemonorops. Sebagai kaitannya, telah dilakukan pencermatan 25 jenis rotan Indonesia dan kelasifikasinya berdasarkan kerapatan, MOR, dan MOE. Dua puluh lima jenis tersebut didominasi oleh Calamus spp. dan Daemonorops spp. Penelaahan secara menyeluruh berdasarkan kerapatan, MOR, dan MOE, sebanyak 16% dari 25 jenis rotan dapat dikelompokkan sebagai kelas I (sangat baik); 36% sebagai kelas II (baik); 32% sebagai kelas III (sedang); dan 16% sebagai kelas IV (rendah). Penelahan berdasarkan keseluruhan sifat (Kerapatan, MOR, MOE) mengindikasikan 4 jenis rotan yang paling berprospek untuk dimanfaatkan (mulai dari urutan tertinggi) yaitu Korthlsia rigida Bl, Calamus inops Becc.ex Heyne, dan Calamus koordesianus Becc dan Korthalsia echinometra Becc; sedangkan yang paling tidak berprospek adalah Korthalsia zeppelii Burret, Plectocomiopsis geminiflora(Griff) Becc, dan Calamus ornatus Blume dan Daemonorops malanocaetes BL.

GOLONGAN SENYAWA INSEKTISIDA DARI EKSTRAK BUNGKIL BIJI JARAK PAGAR DAN UJI EFEKTIVITASNYA Raden Sudradjat; Novia Heryani; Dadang Setiawan
Jurnal Penelitian Hasil Hutan Vol 26, No 4 (2008): 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.2008.26.4.299-312

Pada pernbuatan biodiesel dari ekstrak minyak tanaman jarak pagar (Jatropha curcas) dihasilkan limbah atau bungkil yang masih mengandung kadar protein kasar sekitar 27% sehingga bisa digunakan sebagai pakan ternak, tetapi penggunaannya masih terbatas karena mengandung senyawa toksik. Penelitian ini bertujuan untuk mengetahui jenis kandungan racun dalam bungkil jarak pagar dan seberapa besar efektivitasnya sebagai biopestisida. Metode penelitian dengan memilih 3 jenis larutan pengekstrak (n-heksana, petroleum eter dan etanol) yang tertinggi rendemen minyak bungkilnya serta paling tinggi kandungan zat fitokimianya. Ekstrak minyak diujikan kepada larva C. pavonana untuk mengetahui laju penghambat makan dan mortalitas. Untuk uji penghambat makan digunakan konsentrasi 1;3 dan 5% (b/v), uji mortalitas konsentrasi 0; 2; 4; 6; 8; 10; 12; 14 dan 16% (b/v), dan waktu pengamatan 1 ; 2 dan 3 hari. Larutan pengekstrak yang terbaik dilanjutkan dengan uji fraksi aktif. Pada penelitian ini telah berbasil didapatkan ekstrak yang memiliki aktivitas yang paling tinggi terbadap larva Croadolomia pauonana instar II yaitu ekstrak n-beksana dengan rendemen 50,64%. Hasil uji efektivitas ekstrak n-beksana konsentrasi 3% menunjukkan hasil tertinggi pada aktivitas pengbambatan makan larva dan tingkat kematiannya 100%. Pada uji fraksi aktif, pemisaban menggunakan kromatografi kolom mengbasilkan 3 fraksi aktif. Dari basil analisis GC, fraksi aktif ini terdiri atas 10 senya-wa dan pola spektrum infra merabnya menunjukkan adanya gugus - H,-C-H dan CH,dan CH, dan C=O, bobot molekul setiap senyawa pada fraksi aktif ini berkisar dari 281 sampai 486. Fraksi aktif I yang mengandung senyawa alkaloid dan terpenoid memberikan nilai efektivitas tertinggi dalam pengbambatan aktivitas makan dari larva (90,04%) dan mengbasilkan tingkat kematian 98%. Ekstrak n-beksana memiliki LC50dan LC95 terendah atau paling efektif terbadap pengbambatan kehidupan larva.

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Hutan Vol 9, No 2 (1991): Jurnal Penelitian Hasil Hutan Vol 9, No 1 (1991): Jurnal Penelitian Hasil Hutan Vol 8, No 6 (1991): Jurnal Penelitian Hasil Hutan Vol 8, No 5 (1991): Jurnal Penelitian Hasil Hutan Vol 8, No 4 (1990): Jurnal Penelitian Hasil Hutan Vol 8, No 3 (1990): Jurnal Penelitian Hasil Hutan Vol 8, No 2 (1990): Jurnal Penelitian Hasil Hutan Vol 8, No 1 (1990): Jurnal Penelitian Hasil Hutan Vol 7, No 4 (1990): Jurnal Penelitian Hasil Hutan Vol 7, No 3 (1990): Jurnal Penelitian Hasil Hutan Vol 7, No 2 (1990): Jurnal Penelitian Hasil Hutan Vol 7, No 1 (1990): Jurnal Penelitian Hasil Hutan Vol 6, No 8 (1990): Jurnal Penelitian Hasil Hutan Vol 6, No 7 (1990): Jurnal Penelitian Hasil Hutan Vol 6, No 6 (1989): Jurnal Penelitian Hasil Hutan Vol 6, No 5 (1989): Jurnal Penelitian Hasil Hutan Vol 6, No 4 (1989): Jurnal Penelitian Hasil Hutan Vol 6, No 3 (1989): Jurnal Penelitian Hasil Hutan Vol 6, No 2 (1989): Jurnal Penelitian Hasil Hutan Vol 6, No 1 (1989): Jurnal Penelitian Hasil Hutan Vol 5, No 7 (1988): Jurnal Penelitian Hasil Hutan Vol 5, No 6 (1988): Jurnal Penelitian Hasil Hutan Vol 5, No 5 (1988): Jurnal Penelitian Hasil Hutan Vol 5, No 4 (1988): Jurnal Penelitian Hasil Hutan Vol 5, No 3 (1988): Jurnal Penelitian Hasil Hutan Vol 5, No 2 (1988): Jurnal Penelitian Hasil Hutan Vol 5, No 1 (1988): Jurnal Penelitian Hasil Hutan Vol 4, No 4 (1987): Jurnal Penelitian Hasil Hutan Vol 4, No 3 (1987): Jurnal Penelitian Hasil Hutan Vol 4, No 2 (1987): Jurnal Penelitian Hasil Hutan Vol 4, No 1 (1987): Jurnal Penelitian Hasil Hutan Vol 3, No 4 (1986): Jurnal Penelitian Hasil Hutan Vol 3, No 3 (1986): Jurnal Penelitian Hasil Hutan Vol 3, No 2 (1986): Jurnal Penelitian Hasil Hutan Vol 3, No 1 (1986): Jurnal Penelitian Hasil Hutan Vol 2, No 4 (1985): Jurnal Penelitian Hasil Hutan Vol 2, No 3 (1985): Jurnal Penelitian Hasil Hutan Vol 2, No 2 (1985): Jurnal Penelitian Hasil Hutan Vol 2, No 1 (1985): Jurnal Penelitian Hasil Hutan Vol 1, No 4 (1984): Jurnal Penelitian Hasil Hutan Vol 1, No 3 (1984): Jurnal Penelitian Hasil Hutan Vol 1, No 2 (1984): Jurnal Penelitian Hasil Hutan Vol 1, No 1 (1984): Jurnal Penelitian Hasil Hutan More Issue

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