Jurnal Ilmu Kehutanan
ISSN : 01264451     EISSN : 24773751
Journal of Forest Science (printed version) is accredited by Directorate General of Research Enhancement and Development, Ministry of Research, Technology, and Higher Education No. 36a/E/KPT/2016 which will be valid until May, 2021.
Articles 268 Documents
Pengaruh Generalisasi Unit Lahan pada besarnya Erosi (Studi kasus di DAS Air Nelas, Propinsi Bengkulu)

Sulistyo, Bambang ( Jurusan Budidaya Pertanian, Fakultas Pertanian, Universitas Bengkulu )

Jurnal Ilmu Kehutanan Vol 2, No 1 (2008)
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Abstract

The research aims to identify the effect of land unit generalisasion on the erosion at the Air Nelas catchment area in Bengkulu Province. Land unit generalisation is one step to be done in arrangin RTL-RLKT (Rencana Teknik Lapangan-Rehabilitasi Lahan dan Konservasi Tanah; Field Planning for Soil Rehabilitation and Conservation) conducted by Balai Pengelola DAS (formerly Balai RLKT).Method applied by conducting digital analysis using GIS Program to calculate erosion of the catchment area with USLE (Universal Soil Loss Equation) formula. Comparison analysis was done between the result of erosion before and after land unit generalisation. Land unit generalisation is a process to eliminate land unit having area 1 cm2 on map or 25 hectares on the field at the scale of 1:50.000. The instruction to run generalisation in ArchInfo GIS program is ELIMINATE. Land unit generalisation is done to simplify map analysis manual by avoiding land unit which is very small in the area.The research result showed that for the whole Air Nelas catchment area the erosion rate was 601,279.49 ton/ha/year before generalisation and 267,907.54 ton/ha/year after generalisation, indicating that there was a 33,371.95 ton/ha/year difference or 55.44% as the effect of land unit generalisation process. When the observation was mainly at the area of rehabilitation and conservation, there were categorical changes of the erosion i.e. from Moderate to Heavy or Very Heavy and vice versa. The change was varying between 148,244.82 ton/ha/year (Moderate to Very Heavy) and 79,470.62 ton/ha/year (Very Heavy to Moderate). Overall, the erosion was increaasing aas 65,335.90 ton/ha/year (11,01%) for the whole category in area where rehabilitatin and conservation have to be conducted. Those changes would affect the plan which determine recommendations to be taken in rehabilitation and conservation of catchment areas, as well as change in the project location and budget. Keywords: generalisation, land unit, erosion

Tingkat Kesukaan Rusa Bawean (Axis kuhlii) terhadap Jenis-Jenis Tumbuhan Bawah di Suaka Margasatwa dan Cagar Alam Pulau Bawean

Subrata, Sena Adi ( Jurusan Konservasi Sumberdaya Hutan Fakultas Kehutanan Universitas Gadjah Mada ) , Jauhar, Muhammad Faddel ( Alumni Fakultas Kehutanan Universitas Gadjah Mada )

Jurnal Ilmu Kehutanan Vol 1, No 2 (2007)
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Abstract

This research has a background on the importance of food preference of Rusa Bawean (Axis kuhlii). This information can be used to ensure the adequacy of preferred food availability within their habitat. This paper aimed to estimate food preference of Rusa Bawean employing faecal analysis. The technique was selected because it is safe for the animal and is easy in data analysis and interpretation. To achieve the aim, quasi experimental design was applied to 30 vegetation plots and 60 faecal samples. Data was collected during January 2005 and June 2006 in the area of Wildlife Sanctuary and Nature Reserve of Bawean Island. Data was analyzed with chi-square test and food selection index. Result shows Rusa Bawean have preferences on some of food species, and they do not select their food species randomly according to its abundance.  Preferred food species include Kabak-kabakan alas (Brachiaria distachya), Talioar (Panicum cordayum), Gadung (Dioscorea hispida), Andudur (Caryota mitis), Rombok putih (Merremia peltata), Pele (Urena lobata) and Kabak-kabakan merah (Ischaemum timorense). Whereas avoided food species include Lating-latingan (Scleria hebecarpa), Ancucu (Pericampylus glaucus), Lambu Merah (Paspalum conjugatum), Alang-alang (Imperata cylindrica), Padi-padian (Centotheca lappacea), Lente-lentean (Fimbristylis dichotoma), Taliata (Lygodium circinnatum ) dan Kayu sape (Symplocos adenophylla).  Keywords: Rusa Bawean, food preference, faecal analysis, selectivity index 

Nilai Penting Agroforestri, Hutan Rakyat dan Lahan Pertanian dalam Konservasi Keanekaragaman Jenis Burung di Paliyan, Gunung Kidul, Yogyakarta

Pudyatmoko, Satyawan ( Jurusan Konservasi Sumberdaya Hutan, Fakultas Kehutanan Universitas Gadjah Mada )

Jurnal Ilmu Kehutanan Vol 2, No 2 (2008)
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Abstract

Agroforestry is recognized as a land use management that capable to integrate the need of local peoples and the concern of biodiversity conservation. However, some contradictory results of studies made the importance of agroforestry on conservation of biodiversity questionable. To understand the role of agro­forestry in biodiversity conservation, bird community assemblages of three land use types namely private forests, agroforestry and annual crops were compared. Single belt point count with a radius of 50 m was used to survey birds. In general species diversity in the study area was at a moderate level. Statistically, bird communities between sites did not differ significantly in term of their abundance, species composition, and diversity. It was because patch context plays more important role than patch content. However, it was found that in all community parameter agroforestry area has higher values than those of crops. Consistent with the previous studies, insectivorous birds were the most sensitive to land use changes. The conservation value of Paliyan area was relatively low, because most of species were abundant, and no species inhabit endangered status according to IUCN criteria. Implication of this research was that Paliyan area need a large-compact habitat to conserve high bird diversity.Keywords : bird, conservation, value, landscape, Paliyan.

Studi Kesesuaian Lahan untuk Penentuan Kawasan Lindung di Hutan Lindung Konak Kabupaten Kepahiang Provinsi Bengkulu

Senoaji, Gunggung ( Jurusan Kehutanan, Fakultas Pertanian, Universitas Bengkulu )

Jurnal Ilmu Kehutanan Vol 4, No 1 (2010)
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Abstract

The study aims to determine land suitability of the area into a forest protection by using field physical factors i.e. rainfall intensity, soil type, slope, and altitude. The research is conducted in Konak Forest Protection, Kepahiang, Bengkulu. Basic method used in this research was survey, with sampling and measurement in the field. The results shows the average value of forest protected areas: slope is 0-8% with value of 20, the type of land is podsolic (sensitive to erosion) with value of 60, and rainfall intensity is under 13.6 mm per day, with value of 10, and altitude is 500 meters above sea level. The total value of the factors is 90, far below the standard value of the protected forest which should be more than 174. This means that utilization for other functions, such as recreation area, city garden or land cultivation, will be more appropriate and useful than if only defined as forests protection.Keywords: land suitability, forest protection, land protection area

People Attitude Toward Promotion of Agroforestry Practices in Buffer Zone Area of Mt. Elgon National Park, Uganda

Mukadasi, Buyinza ( Department of International Environment and Development Studies, Norwegian University of Life Sciences ) , Wambede, Nabalegwa ( Department of Geography, Kyambogo University KAMPALA )

Jurnal Ilmu Kehutanan Vol 1, No 1 (2007)
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Abstract

Agroforestry is a historical practice in Uganda where people raised trees, crops and animals together traditionally on the same unit of farmland. This study was conducted to assess the attitude of people regarding the contribution of agroforestry practices in socio-economic development in the buffer zone area of Mutushet and Kortek, Mt. Elgon National Park, Uganda. Primary data were collected through formal household interviews with the use of a structured questionnaire administered to five percent households selected randomly in the Village Environmental Committees (VECs). In addition, key informant interviews and informal group discussions were also held. Altogether 146 households were interviewed. Data were analyzed using Chi-square test. Results show that the attitude of people towards contribution of agroforestry practices is independent of VECs, ethnic group, settlement period, and family size and depends on occupation, literacy level, distance from National Park boundary, damage caused by wild animals, land holding size and number of livestock holding. The important policy recommendation drawn from these findings is that intensive extension and motivation programs should be launched in those areas where the majority of people have unfavourable attitude towards agroforestry practices. Keywords: Agroforestry, attitudes, Buffer Zone, Mt. Elgon National Park

Komponen Kimia Kayu Jati dengan Pertumbuhan Eksentris

Lukmandaru, Ganis ( Bagian Teknologi Hasil Hutan, Fakultas Kehutanan, Universitas Gadjah Mada, Yogyakarta )

Jurnal Ilmu Kehutanan Vol 5, No 1 (2011)
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Abstract

The objective of this study is to learn the quality of abnormal woods. The specimens were 10 leaning trees obtained from thinned teak (Tectona grandis L.f.) stand in Randublatung, Central Java. In each tree, the eccentric growth parts were isolated, then wood meal sample was drilled at the outer heartwood part of both maximum annual-ring width (upper part of leaning stem) and in its opposite side, which had minimum annual-ring width (lower part of leaning stem). The wood meals were ground to size of 40-60 mesh for chemical analysis. Data analysis by paired t-test showed that no significant difference was found between the upper and lower parts in ethanol-benzene extractive content (4-12%), hot-water soluble content (1-3%), ash content (0.73%) and acid soluble lignin content (0.7-1.4 %) . By means of Gas Chromatography (GC) and Gas Chromatography-Mass Spectrometry (GC-MS), no striking difference was also observed in the levels of major components of ethanol-benzene extracts. On the other hand, in Klason lignin content, the wood with widest ring consistently showed a higher content (32-35 %) than that with narrowest ring (29-33 %). These findings indicated that the eccentricity is more related to cell wall components than to secondary metabolites. Further, there is no indication with regard to the formation of tension wood.Keywords : Tectona Grandis, eccentric wood, leaning tree, chemical properties, increment rate. Intisari Tujuan penelitian ini adalah untuk mengetahui kualitas kayu cacat. Spesimen penelitian berupa 10 pohon miring yang diperoleh dari kegiatan penjarangan dari tegakan jati (Tectona grandis L.f.) di Randublatung, Jawa Tengah. Pada setiap pohon, kayu di bagian eksentrisnya dipisahkan , kemudian sampel serbuk kayu diambil pada bagian teras terluar pada kedua lebar lingkaran tahun maksimum (bagian atas pohon miring) dan pada arah yang berlawanan, yaitu yang mempunyai lebar lingkaran tahun minimum (bagian bawah pohon miring). Serbuk kayu dihaluskan sampai mencapai 40-60 mesh untuk analisis kimia. Analisis data melalui uji t pohon pada kadar ekstraktif etanol-benzena (4-12%), kadar terlarut air panas (1-3%), kadar abu (0,7-3%) dan kadar lignin terlarut asam (0,7-1,4%). Pengukuran menggunakan GC dan GC-MS, menunjukkan tidak ada beda yang mencolok pada jumlah komponen utama ekstraktif etanol-benzena. Sebaliknya, kayu dengan lingkaran tahun paling lebar secara konsisten memiliki kadar lignin Klason lebih tinggi (32-35%) dibandingkan kayu dengan lingkaran tahun sempit (29-33%). Hasil-hasil tersebut menunjukkan bahwa eksentris lebih berkaitan dengan komponen dinding sel kayu daripada zat-zat metabolism sekunder. Selanjutnya, tidak terlihat juga adanya indikasi terhadap pembentukan kayu tarik.Kata kunci : Tectona grandis, kayu eksentris, pohon miring, sifat kimia, riap tumbuh. 

Perencanaan Jangka Pendek DAS dengan Metode Perhitungan Erosi Kuantitatif dengan Penginderaan Jauh dan Sistem Informasi Geografis

Harjadi, Beny ( Balai Penelitian Kehutanan, Solo )

Jurnal Ilmu Kehutanan Vol 2, No 1 (2008)
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Abstract

Priority determination of some sub watersheds experienced difficulties based on the fact that data collection of the related sub watersheds takes time and quite costly. Whereas to comprehensively manage sub watershed, some prioritizet sub watersheds have to be chosen to manage holistically and integrally with good coordination between some related agencies. The study was carried out in India in two Nawagaon Maskara Raoi watersheds, Saharanpur city, located 250 km to the east of New Delhi. The study appointed a sub watershed to be the prioritu among the other 10 available using quantitative calculation method (MMF: Morgan, Morgan, and Finney method). The research aimed to measure the quantitative erosion based on MMF model and calculate the value index to determine the priority in sub watershed.The erosion calculation by MMF model produced five erosion levels i.e. very low (vl=0-5t/ha/yr), low (l=5-10 t/ha/yr), medium (m=10-25 t/ha/yr), high (h=25-50 t/ha/yr), and very high (vh 50 t/ha/yr). At the highest erosion level (vh) location with the most extensive land damage to the narrowest respectively was Sarbar Rao (SB) = 116.84 ha, Galr Rao (GR), Sahansra Thakur (ST), Shakumbari Rao (SH), Khawonwala Rao (KH) Kahan Rao (KR), Nawagaon Rao (NW), Chamarla Rao (CH), Track Fallows (TF), Barkala Rao (BR), and Maskara Rao (MR) = 0.34 ha. Of 11 sub watershed, priority value index was calculated, and the highest value (main priority) to the lowest one (least priority) is respectively as follows: GR (Galr Rao) = 33,5, KR (Kahan Rao), ST (Sahansra Thakur), TF (Track Fallows), BR (Barkala Rao), SB (Sarbar Rao), SH (Shakumbari Rao), CH (Chamarla Rao), KH (Kharonwala Rao), MR (Maskara Rao), and NW (Nawagaon Rao) = 18,2. Therefore the main priority fell for sub watershed Galr Rao (997.32) and the least priority for watershed Nawagaon Rao (7646.78 ha). Keywords: Land damage, quantitative erosion, MMF, watershed prioritization, RS & GIS

Kelimpahan dan Keanekaragam Tanaman Pakan Rusa Bawean di Kawasan Suaka Margasatwa Pulau Bawean, Jawa Timur

-, Subeno ( Jurusan Konservasi Sumberdaya Hutan Fakultas Kehutanan Universitas Gadjah Mada )

Jurnal Ilmu Kehutanan Vol 3, No 1 (2009)
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Abstract

Bawean deer (Axis kuhlii) is an endemic species to Bawean. Habitat change and loss, land conversion, and over exploitation affect the availability of potential food forBawean deer. The aims of this research were to identifi  types ofpotential food for Bawean deer in Bawean Wildlife Sanctuary, the abundance ofpotential foods in Bawean Wildlife Sanctuary and the diversity of such potential foods. Data collected using line transects whose length was adjusted according to field condition. The line transects were located in parallel to natural trail of study area. Observation was done in the plots established along transect, where plant being eaten by Bawean deer was found. Plot has a circular form with diameter of 3.14 m. Distance between plots was determined to be 100 m. Indicators used to collect data were feces, footprint and bite or chew mark on food plants. Identification ofplant species was conducted directly for every plant which showed bite or chew mark Data concerning type ofplant and its number, part of plants which was bitten or chewed and plant height were recorded. Abundance will be determined from the number of potential foods in each location. The results were afterwards compared among three forest regions. The diversity of food plant species was determined using Shannon index. The result showed that there are 29 plants considered as potential food for Bawean deer. Most of the plants are grasses, and herbs, while woody plants are found in a small number. Leaves, shoots (buds) and fruits are part of plant often being eaten. There are 14 food plants occurred in Gunung Mas forest region, 27 food plants were found in Gunung Besar forest region and 13 food plants in Tanjung Cina Island. Taliata, rumput padang and gadung have high abundance in Gunung Mas forest region, the smallest abundance was occupied by kayu flat. Kabek-kabekan putih, lading-ladingan and taliata showed the highest abundance in Gunung Besar forest region, while karangsang has the lowest abundance. In Tanjung Cina Island, high abundance was dominated by gadung, taliowar and lading-ladingan. On the other hand, talicacing, kayu tekek and rombok putih showed low abundance. Among three study areas, Gunung Besar forest region has the highest diversity index, followed by Gunung Mas forest region and then Tanjung Cina Island.Keywords : Bawean deer, food plant, abundance, diversity, line transect.

Pola Aktivitas Harian dan Interaksi Banteng dan Rusa dalam Pemanfaatan Kawasan Padang Rumput Sadengan di Taman Nasional Alas Purwo, Banyuwangi, Jawa Timur

-, Subeno ( Jurusan Konservasi Sumberdaya Hutan Fakultas Kehutanan Universitas Gadjah Mada )

Jurnal Ilmu Kehutanan Vol 1, No 2 (2007)
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Abstract

This research was aimed to compare the pattern of daily activities between banteng and deer, and their interaction on using feeding ground in Alas Purwo National Park, Banyuwangi, East Java. Methods used in this research were scan sampling, focused on groups of banteng and deer and focal animal sampling for four chosen individuals from each group. The observations began at 06.00 until 18.00. Daily activities recorded were resting, moving, feeding and drinking. Data analysis was done through arrangement of an ethogram to show daily activity and the time budget, and descriptive analysis to portray daily activity and interaction between banteng and deer. The results show that there are differences in the time used for resting and feeding between banteng and deer. Banteng used feeding ground more for resting (93,2%) and moving (5,7%). While deer used more for feeding (36,6%) and resting (61,8% ). Among chosen individuals of banteng and deer time variation in daily activities was apparent. Adult female of banteng has the highest time for resting (10,6 hours). It also occurred in adult female of deer (8,4 hours). Individual of deer which has the highest time for feeding is offspring with duration of 6,1 hours. Interaction between banteng and deer on using feeding ground tended toward symbiosis of commensalisms, in which they use it together without fighting. They too will vocalize together whenever other species wants to use the feeding ground. Keywords: daily activity, banteng, deer, scan sampling, focal animal sampling.

Participatory Indicators of Success of Community Forestry Programs in Uganda

Mukadasi, Buyinza ( Department of Community Forestry and Extension, Makerere University )

Jurnal Ilmu Kehutanan Vol 2, No 2 (2008)
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Abstract

In Uganda, a large diversity of community initiated forest management systems have evolved recently in response to severe degradation of forests and grazing land and biomass shortages. Forestry professional, forest user group and farmers were organized in June 2004 to develop commonly agreed indicators of the performance of Community Forestry Program in Uganda. Indicators, such as access to fuel wood, incidence of forest fire and amount of community funds raised through the sale offorest products are commonly agreed at local level. Women participation in forestry related meetings and taste of drinking water in the watershed area are also important. Equitable benefit sharing by the community forest users serves as an indicator of better access to forest products. Socio-economic changes such as women participation in forest related decision-making, income generated from community forests, and equity of benefits from community forests also, reflect the program success.Keywords : community forestry, indicators, women participation, Uganda

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