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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 547 Documents
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Optimization Pine Plantation Forest Management in Kediri FMU Regional Division II East Java Andrie Ridzki Prasetyo; Muhamad Buce Saleh; Sudarsono Soedomo
Jurnal Manajemen Hutan Tropika Vol. 23 No. 3 (2017)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Pine forest management today has not already reached its optimal state. The abnormal pine stand structure will cause a decrease in the production of pine resin. This study aimed to determine the optimal rotation of pine plantation forest and formulated the harvest scheduling to ensured optimal resin production. The determination of optimal rotation was conducted by modifying the Faustman formula to be applied on the condition in forest management in Perhutani. Simulation optimization of harvest scheduling was conducted by linear programming. Optimal rotation of pine forest plantation consists of timber rotation and resin rotation. The highest net present value of timber was obtained at 25 year cycles and the highest net present value of the resin was obtained at 35 year cycles. The inclusion of resin benefit was resulting in lengthening the optimal rotation age. The abnormal stand structure was causing the fluctuations of pine resin production. Thus, the efforts to improve it was by applying the harvest scheduling framework. This study concluded that harvest scheduling which conducted over eight periods has made the abnormal stand structure into the normal forest condition. The existence of normal forest condition led to the certainty of pine resin production sustainability.
Returns from Indigenous Hunting in The Lowland Coastal Forests of West Papua, Benefits Threatened Wildlife Species Freddy Pattiselanno; Johan F. Koibur
Jurnal Manajemen Hutan Tropika Vol. 24 No. 1 (2018)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

We conducted a study in eleven villages in the West Papuan Bird's Head Peninsula to determine hunting returns from indigenous hunting in lowland coastal forests. In each town three collaborative hunters were recruited and trained to complete an information sheet for each hunting trip whether or not they were successful, and if so, how many individuals per species were killed and their common names. The results indicated that hunting returns during seven months of observations were 301 animals comprising of timor deer, wild pig, dusky pademelon, grizzled tree kangaroo and common spotted cuscus. The most commonly hunted were two non-native species-wild pigs and deer with a total of 11,475 kg of dressed weight harvested and which we valued at IDR230,625,000 (US$17,435). A lowland forest ecosystem along the coast provides suitable habitats for the largest animals occurring within the sampled villages, like deer and wild pig. Hunting those species–deer and wild pig may provide conservation benefits to native species. There was little evidence of hunting native species or those of conservation concern. From ecology perspective, prey species and hunting return across the lowland coastal forest of West Papua has introduced wildlife species occurring at degraded habitat. Economically, the number of species hunted within the sampled village areas is determined by the hunter's assessment of profitability.  Deer and wild pig are targeted because they provide a large amount of meat for both subsistence and sale purposes.
Comparison of Nyamplung Plant Establishment: Direct Seeding, Bare-root, Blocked Media, and Containerized Seedlings Dede J. Sudrajat; Nurhasybi Nurhasybi; Eliya Suita
Jurnal Manajemen Hutan Tropika Vol. 24 No. 2 (2018)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Nyamplung (Calophyllum inophyllum L.), a native multipurpose tree species, produces good general-purpose timber, biodiesel, and medicine. The most widely used method of establishing the species is transplanting nursery-grown containerized seedlings. The research was aimed to compare the success of plant establishment methods, including direct seeding, direct seeding using seed pellet, bare-root seedling, containerized, and blocked media seedlings. Randomized block design with three blocks was set up for evaluation of field performances including seedling survival, height, collar diameter, root development, and biomass at nine months old. The estimated cost based on 1000 target plants in each method was calculated. Seedling grown up on blocked media and containerized media had the highest field performances (survival, growth, and biomass) followed by bare-root seedlings. Direct seeding using seed pellet tended to have better root formation, especially in tap root length, tap root biomass, and bellow-ground biomass. Based on the cost estimation, direct seeding was twice lower compared to transplanting of containerized and blocked media seedlings. However, planting of blocked media and containerized seedlings was more effective in rapidly growth and establishing canopy, but need higher cost. Whereas direct seeding using seed pellet was more cost efficient. Direct seeding using seed pellet was a promising alternative method for plant establishment of nyamplung.
Social Capital in Mangrove Utilization for Silvofishery: Case Study in Kutai National Park, Indonesia Iin Sumbada Sulistyorini; Erny Poedjirahajoe; Lies Rahayu Wijayanti Faida; Ris Hadi Purwanto
Jurnal Manajemen Hutan Tropika Vol. 24 No. 2 (2018)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Social capital has an important role in mangrove management on conservation areas. Utilization of mangrove forest with silvofishery system can be an alternative developed for the community around the conservation areas. The purpose of this research is to know the strength of social capital in supporting the utilization of mangrove for silvofishery. This research adopted Social Capital Assessment Tool method and data analysis with Partial Least Square-Structural Equation Modeling. The results of the study found that there were several elements of social capital in five study villages that have not supported silvofishery in Kutai National Park (KNP), East Kalimantan, Indonesia. The overall analysis of the respondents showed that there were five elements of social capital have significant effect on silvofishery. The other two elements were insignificant and should be of particular concern to be improved, i.e. social networks and social norms. Indicators to be aware of were the increased knowledge of communities on park-related regulations, increased involvement of individuals in the community, and the strengthening of public figures who can be role models for the community. Mangrove forest of KNP should be kept as conservation area, but it should still pay attention to the socio-economic conditions of the surrounding community. The strength of social capital is expected to realize conservation-based economic development.
Quality of Genetically-Improved Acacia auriculiformis For Renewable Short-Rotation Wood-Energy Rina Laksmi Hendrati; Siti Husna Nurrohmah
Jurnal Manajemen Hutan Tropika Vol. 24 No. 3 (2018)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

To be viable, fast-growing energy plantations must be large in volume, harvested at early age, and maximized calorific value which linked to heartwood proportion. This study examines 38 families in the second generation (F2) progeny trial of Acacia auriculiformis for energy. Heartwood proportion, calorific value and lignin content were assessed at ages 22, 30, 35, and 40 months.  Wood samples from around 300 selected individuals of observed ages from all families were examined. Quality was based on heartwood and sapwood development until reaching the commercial requirement of >33% for lignin content and >4,500 cal g-1 for calorific value.  When required quality has been obtained at particular age, assessment of biomass was carried out from all final individuals in the progeny test. Heartwood proportion varies among families. Heartwood possesses higher values than sapwood in lignin content and calorific value. Individuals with higher heartwood proportion are preferred. Both wood types only reached the required quality for solid wood energy after 3.5 years, however lignin content at much early age are appropriate for wood pellet and briquette. Selection improves heartwood proportion and quality from the first generation (F1) into F2 with an increase of 52% at three years.  Mean annual increments at 3.5 years is 43 m3ha-1yr-1.  
Early Growth of Acacia mangium × Acacia auriculiformis Hybrid in a Clonal Test at Three Different Sites in Indonesia Sri Sunarti; Budiyansah Budiyansah; Arif Nirsatmanto
Jurnal Manajemen Hutan Tropika Vol. 24 No. 2 (2018)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

AbstractAcacia mangium × Acacia auriculiformis hybrid is a promising new option for forest plantations that is propagated using clonal technologies. However, its deployment must be supported by an understanding f how clones respond to differing environment conditions. A multi-site test is therefore necessary; in this   study, three sites, one in Central Java, and one each in Riau and Jambi were used. Between 20 and 44 clones were used at each site, and nine were common to each site. Each trial was laid out in a randomized complete block design with between four and 20 replications, and a between-tree spacing of either 3 × 3 m or 3 × 2 m. Height (H), diameter at breast height (D) and volume (V) were measured two years after planting. Growth rates in Riau and Jambi were substantially higher than in Central Java, a difference that can be attributed to soil type and rainfall. Significant differences were found among the clones for all these variables at all the three sites. For the three sites, clone repeatability was high and ranged from 0.91 to 0.97; ramet repeatability was moderate and ranged from 0.49 to 0.59. Clone x site interaction was highly significant in all parameters observed.  For the nine common clones, multi-site clone repeatability was also high (0.93-0.96), but ramet repeatability was low (0.26-0.35). The best performing clones were Clones 4, 6 and 44. However there were differences in ranking, and only Clone 44, in Central Java and Riau, was the best performing. The experiment has shown the importance of these trials for developing strategies for deploying clonal stock. However the results suggest that it will take longer than two years for a clear pattern of differences between clones to emerge.Keywords: new variety, clone, repeatability, multi-site
A Study of Flood Causal Priority in Arui Watershed, Manokwari Regency, Indonesia Mahmud Mahmud; Ambar Kusumandari; Sudarmadji Sudarmadji; Nunuk Supriyatno
Jurnal Manajemen Hutan Tropika Vol. 24 No. 2 (2018)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Papua is the final fortress of forests in Indonesia. However, floods recently occurred in Jayapura, Paniai, and Manokwari. If causal factors are not identified and early anticipated, the flood will become an annual disaster with more severe impacts. This study aims to identify main factors causing floods using scoring analysis. Data collected include: rainfall, river gradient, water discharge, drainage density, watershed shape, slope and land use. The research results show that the main factor of floods are average daily rainfall in wet month by 86.53 mm day-1 (rather high) with a score of 28, land use dominated by forest and plantation (rather low and medium) with a score of 21, watershed slope dominated by 1-<8% (high) with a score of 5, drainage density of 6.4 (medium) with a score of 3, watershed shape (Rc of 0.30 < Re 0.71) with  somewhat/elongated shape with a score of 2, and river gradient of 0.0062 (low) with a score of 2 respectively. High rainfall causes greater flow of water and runoff. Land use dominated by plantations (21.46%) is thought to be one of the main causes of floods in Masni District. Flood mitigation does not mean that rain should be reduced, but regulates/manages such as stopping the conversion of forest into palm oil plantations, reducing surface runoff by applying soil conservation, making bypass from meandering, dredging sediments, and constructing retaining walls.
The Implication of Spatial Ecology Dependence on Spatial Arrangement in Boundary Area Werenfridus Taena; Lala Mulyowibowo Kolopaking; Baba Barus; Rizaldi Boer; Bambang Juanda
Jurnal Manajemen Hutan Tropika Vol. 24 No. 1 (2018)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Land use changes in upstream cause flooding in the middle and downstreams so that appropriate spatial planning is required. The study aims to (1) analyze the forest management in ecologycal region percpective community, unilateral and bilateral on the boundary areas of Indonesia and Timor Leste, (2) analyze dependence of spatial-ecology with income farmers, and (3) analyze descriptively the spatial planning of border regions. The data used were secondary and primary data which were obtained from Indonesia and Timor Leste. Primary data sampling technique using multistage sampling, namely cluster sampling for the sample village representing the upstream, middle, and downstream of the watershed; while the sample of farmers using purposive sampling. The analysis used was descriptive analyisis which was used to analyze management of forest in ecologycal region on boundary area. Then, the spatial durbin model was used to analyze the dependence effect of spatial-ecology on farmer income in transboundary watershed. The spatial durbin model showed that farmers’ income in the downstream of transboundary watershed will be reduced because patterns of farming on upperstream transboundary watershed tends to be exploitative. This implication required administrative and spatial ecology perspective in boundary spatial planning.  
The Effect of Vegetation Community and Environment on Gyrinops versteegii Growth Rawana Rawana; Suryo Hardiwinoto; Budiadi Budiadi; Sri Rahayu
Jurnal Manajemen Hutan Tropika Vol. 24 No. 1 (2018)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Although Gyrinops versteegii has been domesticated by local community in Sragen Regency, the environmental factors and species which have high compatibility with G. versteegii still have not known yet. The objectives of this research were 1) to know which one of those vegetation communities that gives the best the diameter and height growth of the domesticated G. versteegii, and 2) to know the environmental factors that influenced the growth of the diameter and height of the domesticated G. versteegii. Sampling was done systematically with a plot of size 20 × 20m for trees, 10 × 10m for poles, and 5 × 5m for saplings with a total of 28 plots. SPSS Program version 22 was used for cluster, one-way anova, correlation, and multiple regression analysis. The results showed that for achieving the best G. versteegii growth, the G. versteegii should be planted under the community group which was dominated by Paraserianthes falcataria, Tectona grandis, Gliricidia sepium, and Eugenia aquea. Environmental factors affecting diameter growth of G. verteegii were organic carbon of the soil and the vegetation density. Meanwhile the environmental factors affecting the height growth of G. versteegii were temperature, light intensity, relative light intensity, organic carbon, C N ratio, P, Mg, air humidity, and clay content.
Firewood and Carpentry Wood Contribution to the Communities of Mutis Timau Protected Forest, Timor Island Fransiskus Xaverius Dako; Ris Hadi Purwanto; Lies Rahayu Wijayanti Faida; Sumardi Sumardi
Jurnal Manajemen Hutan Tropika Vol. 24 No. 3 (2018)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

The existence of Mutis Timau Protected Forest (MTPF) has given a real contribution to the community by providing household energy needs and raw materials for building the houses. This preliminary study is aimed at knowing the contribution of M T PF in terms of firewood and carpentry wood consumption in the community. The study was conducted in 9 villages located in and around MTPF. This study used surveys and employed descriptive analysis with 353 families spread proportionally on every village as the sample. The results show that MTPF contributed to as much as 87.45% of the total firewood consumption of the community living in and around the protected forest, while the remaining 12.55% was supplied from the gardens. These percentages were calculated from the total firewood consumption of 1,912,512 kg year-1. Meanwhile, every 15-20 years, MTPF contributed to 96.98% of the total carpentry wood needs (1,177.3 m3) while the remaining 3.02% was supplied from privately owned gardens. This fact indicates that the dependence level of the community on the forest is high. Consequently, the pressure on the forest is also very high and may cause deforestation and degradation. To prevent deforestation and degradation, social participation in the sustainable management of MTPF is needed. The principles of social forestry must be implemented through social forestry programs such as community empowerment.

Page 34 of 55 | Total Record : 547

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