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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 9 Documents
 1 
Search results for , issue "Vol. 20 No. 1 (2014)" : 9 Documents clear
Growth Model of Pine (Pinus merkusii Jungh. Et de Vriese) Stand on Community Forest in Tana Toraja Regency Melewanto Patabang; Daud Malamassam; Hardjanto H
Jurnal Manajemen Hutan Tropika Vol. 20 No. 1 (2014)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Growth modeling and yield simulation of forest is a very important aspect in forest management including community forests. Stand growth model is an abstraction of the dynamic nature of a forest stand, including growth, ingrowths, mortality, and other changes in the structure and composition of the stand. In forest management, growth estimation plays an important role in supporting the sustainability of the benefits value of the community forests. The objectives of the research were to find out the stand growth model and the potential of community's pine forest. The study was conducted at the location of the community pine forests in District Mengkendek Tana Toraja Regency. Sample location, as representative of stand age classes that distribute on some villages in Mengkendek District, were selected by purposive sampling.The study results indicate that the most suitable model for upper trees mean height (H) is Weibull Model, for growth diameter and growth volume is Logistic Model  . The stand mean height (h) can be presented as a function of H and Relative Spacing Ratio (Sr) on the basis of function log Sr = 0,197 – 0,653 log H, then the tree volume, can be estimated on the basis of function log V = -1,70 + 0,94logD + 1,50logh, and then the growth function of volume on the basis of function V = 1.008 / 1 + 251.322 exp(-0.373t. Further, the maximum value of stand Annual Increment was 18 m3ha-1year-1, attained at the age of 20 years.
Conservation Strategy of Rafflesia zollingeriana Koord in Meru Betiri National Park, East Java Dewi Lestari; Agus Hikmat; Ervizal Amir Muhammad Zuhud
Jurnal Manajemen Hutan Tropika Vol. 20 No. 1 (2014)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Rafflesia zollingeriana Koorders is a protected, rare, and endemic plants to Meru Betiri National Park.  However, its population was declined.  So, the study was focused on the analysis of the strengths, weaknesses, opportunities, and threats of conservation of R. zollingeriana to recommend some conservation's strategy and programs. This study was conducted at Meru Betiri National Park and its surrounding 5 villages. Data were collected by interviews, survey, observations, and literature studies. Qualitative data was analyzed by reduction, presentation and drawing conclusions simultaneously, while the quantitative data was analyzed descriptively. Matrix for SWOT analysis was processed by SPSS 16. The result showed that there were 4 elements that identified as strength, 5 elements that identified as weakness, 5 elements that identified as opportunity and 4 elements that identified as threat. The internal factor's value was higher than the external factor. The result of the SWOT analysis indicated that it needs aggresive strategy through collaboration among stakeholders to optimize both strength and opportunites. While the recommended program are: socialization the importance of R. zollingeriana conservation and developing a collaborative R. zollingeriana ecotourism.
Growth and Biomass in Response to Salinity and Subsequent Fresh Water in Mangrove Seedlings Avicennia marina and Rhizophora stylosa Mohammad Basyuni; Lollie Agustina Pancawaraswati Putri; Berliana Nainggolan; Putri Ester Sihaloho
Jurnal Manajemen Hutan Tropika Vol. 20 No. 1 (2014)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

The present study describes the growth and biomass of salt secretor mangrove, Avicennia marina and the non-secretor Rhizophora stylosa by long-term exposure to salinity and its subsequent fresh water. The seedlings of the 2 mangroves grown with varying salt concentration for 3 months were then divided into 2 treatment groups, and grown for another 3 months: 1 continuously in salinity conditions and another in fresh water to recover from salinity. The growth parameter namely plant height and diameter of A. marina was significantly enhanced by salt with maximal stimulation at 2% (equal to 75% natural seawater) and this increase appeared to be attenuated by increasing the salinity concentration above 2%. By contrast, the growth of R. stylosa significantly thrived up to 0.5% salt concentration, then decreased with the increasing of salinity. The growth of both species slightly increased after removal to salinity. Our findings suggested that within the range of salinity treatments, A. marina was more salt tolerant than R. stylosa, which provides important information for mangrove rehabilitation in North Sumatra. The biomass of the 2 mangrove seedlings was changed in the same manner as the growth of plants upon salt and fresh water treatment. These results suggested the importance of mangrove adaptation withstand salt and/or water stress.
The Existing Condition of Mangrove Region of Avicenia marina, Its: Distribution and Functional Transformation Ahmad Herison; Fredinan Yulianda; Cecep Kusmana; I Wayan Nurjaya; Luky Adrianto
Jurnal Manajemen Hutan Tropika Vol. 20 No. 1 (2014)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Mangrove ecosystem existence is important for environment and other organisms because of its ecological and economical values, so that management and preservation of mangrove ecosystem are needed. The purpose of this research was to determine the existing condition of mangrove, both its distribution and its functional transformation in Indah Kapuk Coastal Area. Avicennia marina  becomes important as wave attenuation,  a form of abrasion antidote. Transect-Square and Spot-Check methods were used to determine the existing condition of A.marina mangrove forests. Autocad program, coordinate converter, Google Earth, Google Map, and Arc View were applied in process of making mangrove distribution map. In western of research location exactly at Station 1 and Station 2, the density value of mangrove was 450 and 825 tree ha-1, respectively with  sparse category because they were contaminated by waste and litter. In eastern of research location namely Station 3, Station 4, and Station 5 the mangroves grow well with density value of 650 (sparse), 1,500 (very dense), and 1,200 tree ha-1 (fair), respectively, eventhough the contamination still happened. The mangrove forests around the stations do not function as wave attenuation because there were many waterfront constructions which have replaced the function of mangrove forests to damp the wave. In short, it can be stated that the mangrove's function has changed in a case of wave attenuation. The function of mangrove forests is not determined by mangrove forest density but it is determined by mangrove's free position.
The Commercial Profitability of Growing Hybrid Eucalyptus Clones in The Coast Province, Kenya Balozi Bekuta Kirongo; Kingiri Senelwa; Kimani G K; Imo Moses; Onkware Augustino; Lazane Etiégni
Jurnal Manajemen Hutan Tropika Vol. 20 No. 1 (2014)
Publisher : Institut Pertanian Bogor (IPB University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (644.602 KB) | DOI: 10.7226/jtfm.20.1.35

Abstract

Due to the current high demand for timber, fuelwood, and building poles and the realization that tree growing may pay dividends in the short and long term, many farmers are planting trees on their farms. Farmers are increasingly planting eucalyptus partly due to the fast growth rates of the hybrid clones as well as the opportunity to earn money within a short time. In this paper we report on the profitability of growing eucalyptus hybrid clones in the coastal region, Kenya. Tree growth and cost data was sourced from farmers in Malindi, Kilifi, and Msambweni. Market information was sourced from hardwares in North and South Coast while tree growth models were used to provide average tree sizes at various ages. Results showed that a farmer could make a net income of upto Kshs.500,000.00 (USD6,250) in 5 years. Farmers in the South Coast (Kwale and Msambweni) spent more on transport than their counterparts in the North Coast (near Gede-KEFRI). This, added to the fact that trees in the South Coast (Msambweni) grew less compared to those in North Coast meant that farmers in the south made less profits.
Habitat Preferences, Distribution Pattern, and Root Weight Estimation of Pasak Bumi (Eurycoma longifolia Jack.) Siti Masitoh Kartikawati; Ervizal Amir Muhammad Zuhud; Agus Hikmat; Hariadi Kartodihardjo; Munawar Fuadi
Jurnal Manajemen Hutan Tropika Vol. 20 No. 1 (2014)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Pasak bumi (Eurycoma longifolia Jack) is one of non timber forest products with “indeterminate” conservation status and commercially traded in West Kalimantan. The research objective was to determine the potential of pasak bumi root per hectare and its ecological condition under natural habitat. Root weight of E. longifolia Jack was estimated using simple linear regression and exponential equation with stem diameter and height as independent variables. The results showed that the individual number of the population was 114 with the majority in seedling stage with 71 individuals (62.28%). The distribution was found in clumped pattern. Conditions of the habitat could be described as follows: daily average temperature of 25.6oC, daily average relative humidity of 73.6%, light intensity of 0.9 klx, and red-yellow podsolic soil with texture ranged from clay to sandy clay. The selected estimator model for E. longifolia Jack root weight used exponential equation with stem height as independent variable using the equation of Y= 21.99T0,010 and determination coefficient of 0.97. After height variable was added, the potential of E. longifolia Jack minimum root weight that could be harvested per hectare was 0.33 kg.
Carbon Stored on Seagrass Community in Marine Nature Tourism Park of Kotania Bay, Western Seram, Indonesia Mintje Wawo; Yusli Wardiatno; Luky Adrianto; Dietriech Geoffrey Bengen
Jurnal Manajemen Hutan Tropika Vol. 20 No. 1 (2014)
Publisher : Institut Pertanian Bogor (IPB University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (521.921 KB) | DOI: 10.7226/jtfm.20.1.51

Abstract

Currently, the function of seagrass community as carbon storage has been discussed in line with “blue carbon” function of  that seagrass has. Seagrass bed are a very valuable coastal ecosystem, however, seagrass bed is threatened if compared to other coastal ecosystems, such as mangroves and coral reefs.  The threatened seagrass experienced also contributes to its capacity in absorbing CO2 emission from greenhouse gasses such as CO2 emission Temporal estimation  shows that CO2 emission will increase in the coming decade. On the other side, efforts to decrease climate change  can be influenced  by the  existence of seagrass.  Informations about existence of seagrass as carbon storage are still very rare or limited. This study was aimed to estimate carbon storage on seagrass community  in Marine Nature Tourism Park of Kotania Bay Area, Western  Seram,  Maluku Province. The  quadrat transect method of 0.25 m2 for each plot was used to collect seagrass existence. The content of carbon in the sample of dry biomass of seagrass was analyzed in the laboratory using Walkley & Black method. The results  showed that total carbon stored was higher in both Osi and Burung Islands of Kotania Bay  than other studied areas (Buntal and  Tatumbu Islands, Marsegu Island, Barnusang Peninsula, Loupessy and  Tamanjaya Village).    The average  carbon stored in  Kotania Bay waters was 2.385 Mg C ha-1,  whereas the total of carbon stored was 2054.4967 Mg C.
Annual Equivalent Value, Benefit Cost Ratio, and Composite Performance Index as Valuation Appraisal Support of Teakwood Plantation Sugiharto Soeleman; Endang Gumbira Sa'id; Heny Kuswanti Suwarsinah Daryanto; Arif Imam Suroso
Jurnal Manajemen Hutan Tropika Vol. 20 No. 1 (2014)
Publisher : Institut Pertanian Bogor (IPB University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (659.183 KB) | DOI: 10.7226/jtfm.20.1.58-65

Abstract

Teak (Tectona grandis L.f) is a premium high-value hardwood species being viewed as the most preferred species for investment opportunity. Recently, there has been a gradual move away from state control of teakwood plantation toward the participation of private enterprises. Several enterprises offer investment opportunity of teakwood plantation in which one of the main selling points being offered is a quick harvesting schedule. A quick harvesting time, however, might not provide the best outcome to the investors. This research exercise and compare the valuation appraisal of different harvesting schedules. The research focused on project planning, enterprise budget, financial projection, and valuation measurements to arrive at overall appraisal. To avoid any possible bias of individual investor's preference on common valuation criteria such as total investment, net cash flow (NCF), net present value (NPV), internal rate of return (IRR), profit on investment (P/I), and payback period (PBP), 3 otherS criteria namely benefit cost ratio (BCR), annual equivalent value (AEV), and composite performance index (CPI) have been applied to arrive at a more fair valuation. It is concluded that the longer the harvesting schedule, the better valuation outcome could be achieved, and therefore, investors should critically review any investment proposal in accordance to their preference on valuation criteria.
Hyper Spectral Remote Sensing of Tropical and Sub-Tropical Forest (Editors: Margaret Kalacsca & G. Arturo Sances–Publisher: Azofeita CRC Press, Year 2008, 320 pages) I Nengah Surati Jaya
Jurnal Manajemen Hutan Tropika Vol. 20 No. 1 (2014)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

It is estimated that most of the problems in forestry associated with the spatial attributes.    From the perspective of forest function that includes production, ecological, and social functions, the spatial aspects has always been a very important part. In Indonesia, the forestry areas is always dealing with very large areas which is mostly inaccessible due to limitation of roads, mountainous with steep slopes, cliffs, hills or wetland such as peat, swamp or marsh.  This condition makes it difficult to collect the data in quick manner comprehensively with low cost. Veronique et al. (2012) recognized that remote technology may provide objective, practical and cost-effective solution.   Currently, one of the most reliable data source that can be repetitively acquired with a unique and consistent traits are those derived from satellite imageries.  It had been known that since the 1990s, earth resources remote sensing sensor is progressively developed either with finer spatial resolution, higher spectral resolution, more frequent revisit or wider dynamic range.   The advent of high spectral resolution (e.g. hyperspectral) is quite challenging and prospectively gives a significant contribution, especially in forest management with higher level of detailed information.  Without having adequate spatial information supported by strong scientific arguments, the forestry sector will be persistently pressured by many other sectors.

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