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INDONESIA
MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management
Published by Institut Pertanian Bogor
ISSN : 20870469     EISSN : 20892063     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Jurnal Manajemen Hutan Tropika is a periodic scientific articles and conceptual thinking of tropical forest management covering all aspects of forest planning, forest policy, utilization of forest resources, forest ergonomics, forest ecology, forest inventory, silviculture, and management of regional ecosystems.
Arjuna Subject : -
Articles 537 Documents
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Kontribusi Hutan Rakyat terhadap Pendapatan Rumah Tangga di Sub DAS Cimanuk Hulu H Hardjanto
Jurnal Manajemen Hutan Tropika Vol. 7 No. 2 (2001)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

This article provides the contribution of private forest to household income. Private forest has the ecological and economic functions. One of the ecological functions is hydro-orological function, while the economic function is as one of the income source for the owner.  This article used the secondary data from the survey of Upper Cimanuk Watershed Management at 1996. The results of the research indicate that the contributions of private forest to the total income of household are different: for upper zone (31,5%), middle zone (5,6%) and lower zone (10,2%). Those differences are highly correlated with the extent degree of land fertility.
Kontribusi Repong Damar terhadap Ekonomi Regional dan Distribusi Pendapatan Wijayanto, Nurheni
Jurnal Manajemen Hutan Tropika Vol. 8 No. 2 (2002)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

This research has aims to learn the contribution of Repong Damar to regional economic and income distribution. The data for research consists of primary and secondary data. The secondary data is collected for the analysis of regional economic, and the primary data is used to calculate the income distribution. The analysis of regional economic with Location Quotient (LQ), and Gini Index is used to analysis the income distribution. The result showed that damar sector had become base activities and had positive economic growth at West Lampung. The value of Gini Index is 0.356 for South Pesisir District, 0.300 for Central Pesisir District, and 0.526 for North Pesisir District. The value of Gini Index for Pesisir Krui Region is 0.394. This value shows that Repong Damar had main contributed on income distribution in Pesisir Krui Region.
Metode Penyimpanan Benih Merbau (Intsia bijuga O. Ktze) Yuniarti, Naning
Jurnal Manajemen Hutan Tropika Vol. 8 No. 2 (2002)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

This study describes a proper methode of seed storage to ensure merbau seeds remain viable after being separated from their host plant, and enable to germinate satisfactory by after planting. The aim of this research is to find out a proper methode of seed storage of merbau seeds. In implementing proper storage methode, three types of factors were tested, i.e : storage container (plastic, can, cloth bags, sack bags and bamboo box), storage room (air conditioned and room/ambient temperature); and storage durations (0, 2,4 and 6 months). The results showed that the most proper seed storage of merbau seeds was by using plastic bag container in an air conditioned room.
Respon Hidrologi Daerah Aliran Sungai (DAS) Berhutan Jati (Tectona grandis) (Studi Kasus di DAS Cijurey, KPH Purwakarta, PT. Perhutani Unit III Jawa Barat) H Hendrayanto; Nana Mulyana Arifjaya; Omo Rusdiana; Basuki Wasis; P Purwowidodo
Jurnal Manajemen Hutan Tropika Vol. 7 No. 2 (2001)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

The discharge of the upper Cijurey watershed (4.217 km2) was measured using an automatic water level recorder since 1999. The teak (Tectona grandis) plantations of different age classes cover the whole watershed. The watershed is dominated by undulating topography with gentle slopes, low soil permeability and also low potential aquifer flow rate.  Hydrograph analysis shows that high peak flow (Qp) reached 32,5 m3/s (1,3 m), while concentration time (Tc) and recession time (Tr) were 2 hours and 3 hours, respectively. Visual observations on stream flow shows that the maximum discharge was more than 2 m high, which caused flood, while for two successive months (August and September, 2000) the river at the watershed out let was totally dry. These hydrograph properties indicated the quite bad hydrological response of the watershed. 
Fungi yang Berasosiasi dengan Benih Acacia crassicarpa Sesaat Setelah Panen dan Setelah Penyimpanan IGK Tapa Darma; Ari Sumrahadi
Jurnal Manajemen Hutan Tropika Vol. 7 No. 2 (2001)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Acacia crassicarpa is one of the forest tree species recommended for the establishment of Industrial Forest Plantations (Hutan Tanaman Industri/HTI) due to its fast growth on any soil type, and its prominent adaptability and resistance to sub-optimal field conditions, as well as to its high quality wood.  One of the problems faced is the fact that the seeds are susceptible to pathogens soon after harvesting, as well as after they are stored. The pathogens cause seed-rot or reduce the germination percentage.  The study was conducted to determine the storage fungi and their effects on the seed viability. The information gathered was expected to be useful for the development of the control method to reduce the loss due to fungal infection.  In this study, 30 seed samples of A. crassicarpa were collected soon after harvesting and another 30 seed samples after 3-month placed in Dry Cold Storage. The germination and the infection percentages of the seeds were determined by employing the blotter test method (ISTA, 1976), 7 days after storage. The experiment was carried out in five replicates.  Soon after harvesting, the fungal species associated with the seeds were Penicillium sp., Aspergillus sp., and Rhizopus sp.. Penicillium sp. was the dominant species with 40% seed infection and 73,3% seed germination. After 3-month placed in DCS, the same species were associated with the seeds and the dominant species was Rhizopus sp. with 77,3% seed infection and 60,7% seed germination.
Gis-Based Method in Developing Wildfire Risk Model (Case Study in Sasamba, East Kalimantan, Indonesia) Jarunton Boonyanuphap; F Gunarwan Suratmo; I Nengah Surati Jaya; Fahmi Amhar
Jurnal Manajemen Hutan Tropika Vol. 7 No. 2 (2001)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Analisis pemetaan lengkap (Cemplete Mapping Analysis) yang berbasis sistem informasi geografis (SIG) digunakan untuk melakukan pembobotan terhadap nilai “vulnerability” dari faktor-faktor resiko dalam rangka membangun suatu model dan memetakan kelas-kelas resiko kebakaran liar. Ada dua faktor utama, yaitu faktor lingkungan fisik dan aktifitas manusia yang sangat mempengaruhi terjadinya kebakaran hutan. Model yang ditemukan pada saat ini memperlihatkan bahwa kelembaban relatif adalah faktor terpenting diantara faktor lingkungan fisik, sementara jarak terhadap pusat-pusat pemukiman merupakan faktor terpenting diantara faktor aktifitas manusia. Diketahui juga bahwa, terjadinya kebakaran liar lebih banyak dipengaruhi oleh faktor aktifitas manusia daripada faktor lingkungan fisik. Pada studi ini, wilayah resiko kebakaran liar dibagi atas 3 kelas, dimana ditemukan bahwa kelas resiko kebakaran tertinggi mendominasi lokasi penelitian, selanjutnya diikuti dengan kelas resiko sedang dan rendah. Berdasarkan hasil verifikasi, model hanya berhasil menduga kelas resiko tinggi yaitu sebesar 76,05%, sementara gagal dalam menduga resiko kebakaran sedang dan rendah (lebih rendah dari 40%).
Identifikasi dan Uji Patogenisitas Penyebab Penyakit Hawar Daun Pada Suren (Toona sureni Merr.) Achmad; Maisaroh, Mamay
Jurnal Manajemen Hutan Tropika Vol. 10 No. 1 (2004)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Rhizoctonia sp. causes leaf blight on Toona sureni. This pathogen has characteristics such as right-angles hyphal branching pattern, the presence of septa, the absence of clamp connection, produced no conidia nor spores, and formed sclerotia. The disease symptom is necrotic type with brownish lesions which develop fast on the leaf. Being covered by the lesions, the leaf will be completely brown, macerated and then become wilt, dry and fall. The dispersal of the disease is mediated by the touching of the infectious leaves with the healthy ones. The experiment showed that Rhizoctonia inoculation on leaf, with or without wound, caused the seedling diseased.
Effect of Blue Stain on the Toughness of Benguet Pine (Pinus Kesiya Royle Ex. Gordon) Wood I.G.K. Tapa Darma
Jurnal Manajemen Hutan Tropika Vol. 10 No. 1 (2004)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Kualitas kayu pinus Beunguet dipengaruhi oleh banyak faktor, diantaranya serangan blue stain sangat mempengaruhi sifat-sifat kayu seperti keindahan dan ”daya tahan beban tiba-tiba” (toughness) kayu serta mengurangi nilai jual dan pemasaran kayu. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh serangan blue stain terhadap daya tahan beban tiba-tiba dari kayu pinus Benguet (Pinus kesiya Royle ex. Gordon) pada berbagai periode inkubasi. Ternyata hasil penelitian ini menunjukkan daya tahan beban tiba-tiba kayu pinus Benguet yang diserang blue stain baik yang diinkubasi selama satu bulan maupun dua bulan atau kontrol tidak menunjukkan perbedaan yang nyata. Meskipun demikian, ada indikasi yang ditunjukkan oleh waktu inkubasi, semakin lama kayu diinkubasikan maka semakin berkurang daya tahan beban tiba-tiba dari kayu.Keywords: Pinus kesiya Royle ex. Gordon, blue stain, toughness
Analisis Spasial Degradasi Hutan dan Deforestasi: Studi Kasus di PT. Duta Maju Timber, Sumatera Barat Mulyanto, Lukman; Jaya, I Nengah Surati
Jurnal Manajemen Hutan Tropika Vol. 10 No. 1 (2004)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

This study develops a predictive model on forest degradation and deforestation in Duta Maju Timber concession area West Sumatera during 1999 and 2002 period. The study found that the likelihoods of the forest degradation and deforestation are significantly affected respectively by distance from villages/settlement centers (X1), distance from rivers/streams (X3), distance from public road/logging roads (X2) and the age of logged over forest (X4). The probality of forest changes was negatively correlated with the distance from the villages and the age of logged over forest. While the rest variables (X3 and X2) are positively correlated. The best predictive model obtained for predicting forest degradation and deforestation was the logistic model (y =(10-7,64).X4-23,565.X1-6,889 . X35,505. X23,712) having considerably high coefficient correlation.
The Effects of Climatic Variations on Peat Swamp Forest Condition and Peat Combustibility Lailan Syaufina; Ahmad Ainuddin Nuruddin; Jamaluddin Basharuddin; Lai Food See; Mohid Rashid Mohd Yusof
Jurnal Manajemen Hutan Tropika Vol. 10 No. 1 (2004)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Studi tentang pengaruh variasi iklim terhadap kondisi hutan rawa gambut dan kemampuan terbakar gambut ini dilaksanakan di Hutan Simpan Sungai karang, Tanjong Karang, Selangor, Malaysia. Tujuan dari studi ini adalah untuk menentukan: 1) Variasi iklim di daerah penelitian , 2) Pengaruh variasi iklim terhadap kondisi hutan rawa gambut; 3) Kemampuan terbakar gambut dan faktor-faktor yang mempengaruhinya; dan 4) Pengaruh kebakaran hutan terhadap kondisi hutan rawa gambut. Studi ini dilakukan di kompartemen 127 selama dua periode, yaitu: Oktober 1999 sampai Januari 2000 dan Mei 2000 sampai Oktober 2000, sementara, studi tentang pengaruh kebakaran dilakukan di kompartemen 132 dari Oktober 1999 sampai dengan Januari 2000. Studi ini mengklasifikasikan musim kemarau dan musim penghujan sebagai periode dengan curah hujan bulanan berturut-turut kurang dari atau sama dengan 125 mm dan lebih besar dari 125 mm. Daerah penelitian memiliki dua periode kering, yaitu: Januari, Februari, dan Maret sebagai periode pertama dan Mei sampai Agustus sebagai periode kedua. Secara statistik, musim berpengaruh pada kadar air, bulk density, potassium, magnesium, sodium dan tinggi muka air. Dengan menggunakan prediksi curah hujan mingguan, kadar air kritis dari lahan gambut terhadap kebakaran adalah 355 %.Keywords:  climatic variations, peat swamp forest, forest fire, peat combustibility

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