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MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management

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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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Breeding Strategy of Acacia Hybrid (Acacia mangium × A. auriculiformis) to Increase Forest Plantation Productivity in Indonesia Sri Sunarti; Mohamad Na'iem; Eko Bhakti Hardiyanto; Sapto Indrioko
Jurnal Manajemen Hutan Tropika Vol. 19 No. 2 (2013)
Publisher : Institut Pertanian Bogor (IPB University)

Acacia hybrid (Acacia mangium× A.auriculiformis) shows better growth and wood properties, and tolerance to pest and disease. Currently, acacia hybrid breeding strategy was developed through naturally hybrid selected from trees grown in plantation. However, mass propagation of acacia hybrid using such kind of strategy was not satisfied due to ageing effect. This study was aimed to develop a new acacia hybrid breeding strategy using controlled pollination hybridization technique. The strategy was developed through a series of research: flowering, crossing, hybrid identification, clone multiplication, and clonal test. The results of study showed that the series of research for developing acacia hybrid breeding strategy was achieved. Flowering time synchronization provided a high probability for the success of controlled pollination hybridization. Leaves taxonomy at seedling stage revealed to be an efective way to identify acacia hybrid with acuracy of 92.2%. The acacia hybrid was succesfully propagated using shoot cutting at rate of 78.1%. The best selected clones of acacia hybrid outperformed in height growth at rates of 17.28% over to superior pure parents, which is equivalent to the estimated stand productivity at around 48 m3 ha-1 y-1. The series of research provided a new effective and efficient breeding strategy for acacia hybrid.

Genetic Diversity of Eurycoma longifolia Jack Based on Random Amplified Polymorphic DNA Marker Rosmaina Rosmaina; Zulfahmi Zulfahmi
Jurnal Manajemen Hutan Tropika Vol. 19 No. 2 (2013)
Publisher : Institut Pertanian Bogor (IPB University)

Eurycoma longifolia Jack is one of the extensively exploited medicinal plants in Indonesia. The objectives of this study were to obtain information on genetic diversity and population genetic structure of E. longifolia to formulate effective conservation plan. RAPD marker was used to assess the genetic diversity of E. longifolia collected from 5 natural populations in Riau Province. A total of 25 plants were analyzed using 5 RAPD primers, which amplified produced 44 scored DNA bands. The mean observed number of alleles per locus (No), number of effective alleles (Ne), and percentage of polymorphic loci (PPL) of E. longifolia were 1.57, 1.34, and 56.80%, respectively. The degree of differentiation among populations of E. longifolia was 0.31 (Ht = 0.29; Hs = 0.20). The mean value of estimated gene flow among populations of E. longifolia was 1.11 individual per generation. The UPGMA dendogram formed 2 significant clusters. The first cluster consisted of Pelalawan and Kampar populations, while the second cluster was formed from Kuansing, Rohul, and Rohil population. The genetic diversity information in this study is very important to perform efficient conservation and effective future management of its genetic resources.

Biomass Estimation Using ALOS PALSAR for Identification of Lowland Forest Transition Ecosystem in Jambi Province Eva Achmad; I Nengah Surati Jaya; Muhammad Buce Saleh; Budi Kuncahyo
Jurnal Manajemen Hutan Tropika Vol. 19 No. 2 (2013)
Publisher : Institut Pertanian Bogor (IPB University)

The accurate information derived from high accuracy of remote sensing imagery analyses coupled with field observation data are required to develop a sound forest management. The study is mainly emphasized on assessment of the capabilities of remote sensing imageries to identify ecosystem types within the transitional ecosystem. Since, the predominant transition ecosystems found within the study area were secondary forest, rubber jungle, rubber, oil palm plantation, and also other land cover such as mixed plantation and shrubs, therefore, the models developed were focused for those ecosystem types. Prior to any further analysis, this study was initiated to develop the biomass estimation model using 50 m resolution of ALOS PALSAR image in transition ecosystem, Jambi Province. Biomass models were developed by analyzing the relationship between backscatter magnitude and field biomass. Backscatter magnitude from 1 polarization images, namely HH, HV, and one additional band of ratio of HH/HV were analyzed simultaneously with field biomass. The best models established are AGB = 42,069 exp (0.510 HV) and AGB = 1,610 exp (-0.02 HV²) with R² of 52.3% and 50,8%, respectively. The models are then used to map out the biomass distribution within the transition ecosystem and to identify the factors affecting the magnitude of biomass content for all transition ecosystem types.

Stakeholders Analysis of Policy-Making Process: The Case of Timber Legality Policy on Private Forest Mulyaningrum Mulyaningrum; Hariadi Kartodihardjo; I Nengah Surati Jaya; Bramasto Nugroho
Jurnal Manajemen Hutan Tropika Vol. 19 No. 2 (2013)
Publisher : Institut Pertanian Bogor (IPB University)

The objective of the study is to identify and measure the relationships among stakeholders that influence the process of policy-making in defining legality of timber from private forests. The study focuses on the policy-making process of the Ministry of Forestry Regulation P.38/Menhut-II/2009 on Standard and Guidelines for Assessment of Sustainable Forest Management Performance and Timber Legality Verification of Concessionaire or of the Private Forest License Holder as the subject that has been implemented in several private forest management units as follow: Giri Mukti Wana Tirta in Lampung, Koperasi Serba Usaha APIK in Bali, Koperasi Hutan Jaya Lestari in South East Sulawesi, and Koperasi Wana Lestari Menoreh Kulonprogo in Yogyakarta. This research used a qualitative approach and the analysis method used in this research is a modified-stakeholder analysis that developed by ODA (1995), Reitbergen et al. (1998), and Mayer (2005). The stakeholder analysis shows that the interests and influences do not consider private forest farmers as primary stakeholder during the process of policy formulation. The strong national and international interests, supported by high authority could not be influnced by the role of the NGOs and academicians. The imbalance of responsibilities, rights, and revenues that was experienced by farmers as the manager of private forest when started implementing the policy was more as burdens, it means implementation of the policy was more as burdens. Strong relationships between the Ministry of Forestry with the state as a core could not empower the relationship with private forest farmers. As result, policy assumptions cannot be implemented properly.

Double Dividend from Tariff Differentiation of Reforestation Fund Sudarsono Soedomo
Jurnal Manajemen Hutan Tropika Vol. 19 No. 2 (2013)
Publisher : Institut Pertanian Bogor (IPB University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (514.605 KB)

Distortionary levy applied uniformly to all diameter classes of logs from logging natural forest can lead to inefficiencies; certain diameter should be left in the field because it is not economical to be used. Win-win or Pareto improving solution can be achieved if the government is more flexible. Social welfare is higher because of the waste that can be utilized to create employment, production and additional benefits for employers, as well as revenue for the state. Even if the levy rates are forced to zero for small-diameter timber, governments is actually not harmed at all because from the beginning the government does not get any revenue from small timber that is left in the field as waste. In scarcity situations of timber from natural forests, it is desirable if the government is considering differentiating charges in order to reduce or possibly eliminate the volume of waste generated by the levy. In general, tariff differentiation done in the form of higher tariffs for higher diameter logs. If possible, the lowest diameter limit of logs is forced down to its technical limits. That is, the processing tool that will determine how the minimum diameter logs can be processed profitably.Keywords: tariff differentiation, efficiency, timber utilization, government revenue, win-win solutionDOI: 10.7226/jtfm.19.2.163

Diversity of Soil Arthropods in Teak Forest Plantation Forests at Cepu, Blora, Central Java Noor Farikhah Haneda; Novia Tri Marfuah
Jurnal Manajemen Hutan Tropika Vol. 19 No. 3 (2013)
Publisher : Institut Pertanian Bogor (IPB University)

Insects are the main group of soil arthropod and the most dominant animals in the terrestrial ecosystems. The aims of this study were to get information about soil arthropod diversity in relation to environmental influence at teak plantations at Cepu, Central Java. The sampling plot design was based on forest health monitoring design method. Pitfall trap and Berlese-Tullgren funnel were employed to collect the soil arthropods. The trapped specimens were sorted in the laboratory and then identified up to family or genus. The result of the study revealed that young-age plantation has higher abundance and diversity of arthropod than old-age plantation. Totally we found 3 classes, 11 orders, 29 families, and 714 individuals from young teak plantation, and 3 classes, 11 orders, 25 families, and 397 individuals from the old one. The dominant class was insect and the dominant order of the insects was Hymenoptera. The thickness of the teak litter was the most important factor to the abundance of soil arthropods (R2 = 0.891).

Implications of the Private Property Right to the Community Forest Businesses Formalization through the Certification Policy Bramasto Nugroho; Tatang Tiryana
Jurnal Manajemen Hutan Tropika Vol. 19 No. 3 (2013)
Publisher : Institut Pertanian Bogor (IPB University)

This study aimed to analyze the implication of formalization of community forest business efforts through mandatory timber legality certification policy. Field survey was conducted in March–April 2012 in 3 districts in Central of Java namely Blora, Wonogiri, and Wonosobo District. The results showed that community forest is mainly planting in their private owned land. It brings 2 consequences. Firstly, their willingness to manage their forest sustainably was emerged without any enforcement from external parties. Secondly, there were autonomous in decision making in their way to manage their forest such as they only planted tree species that easy to sell and valuable, they only cut their trees when they need huge money for children schooling, marriage, illness, and housing. The autonomous decision making gives also the owners (farmers) other alternatives to utilize their land otherwise planting the trees. It is mean, if the policy is decreasing the potential benefits from growing the trees, they can also convert their community forest into other business in which profitable and easy to sell their products. From those facts, it seems the formalization of community forest business through mandatory certification is not a proper policy to enhance the community forest.

Initial Infection of Falcataria moluccana Leaves and Acacia mangium Phyllodes by Uromycladium tepperianum Fungi in a Laboratory Trial Siti Muslimah Widyastuti; Harjono Harjono; Zulchan Andika Surya
Jurnal Manajemen Hutan Tropika Vol. 19 No. 3 (2013)
Publisher : Institut Pertanian Bogor (IPB University)

Sengon is a fast growing species that is cultivated widely in Indonesia. Lately, sengon is severely attacked by fungus Uromycladium tepperianum that causing gall rust disease. It is also known to attack various types of acacia. This study aims to determine the fungal infection process U. Tepperianum on sengon leaves and the possibility of infection on Acacia mangium in the laboratory trial. Leave samples and fungal pathogen teliospores obtained from Cangkringan, Sleman, Yogyakarta. Several approach procedures conducted to achieve these objectives were: (1) identification of diseased trees, (2) collecting samples of diseased leaves, branches, twigs, and stems, and (3) artificial inoculation and investigating the infection process of U. tepperianum teliospores in the laboratory. The results showed that the process of infection in sengon started by teliospores germination and germ tube formation. Successive germ tube forming penetration pegs. In the plant tissue, the penetration peg formed hypha and further developed into intracellular and intercellular hyphae. The artificial inoculation on A. mangium leaf surface showed few spores can germinate. However, none of them managed to penetrate.

Low Impact Felling Distance and Allowable Number of Felled Trees in TPTI System Ahmad Budiaman; Adita Agung Pradata
Jurnal Manajemen Hutan Tropika Vol. 19 No. 3 (2013)
Publisher : Institut Pertanian Bogor (IPB University)

Indonesian Selective Cutting and Planting System (TPTI) is a silvicultural system of production natural forests management conducted in Indonesia. TPTI implementation has resulted in damage to the residual stands and threatened the existence of production natural forests in Indonesia. This study assessed the damage level of the residual stands of commercial species due to low cutting intensity (0.77 trees ha-1), calculated low damages cutting distance, and determined the number of trees ha-1 which could be harvested sustainably. Dynamic sample plots with a circular shape with a radius of 2 times the height of felled trees were used in this study, and the number of sample plots was 29 plots with an average area of 1.3 ha. In the sample plots, the tree species, total height, diameter at breast height (dbh), and number of commercial trees ≥ 10 cm dbh were measured before and after cutting. The results showed that the damage level of residual stands caused by the low cutting intensity was 2.1%, where the damages included broken stems, splitted stems, and injured stems, leaning trees, fallen trees, broken crowns and broken buttresses. The low cutting intensity had damaged 7 commercial tree species with the diameter ≥ 10 cm. The study recommends sustainable cutting on TPTI with a distance of > 1.5 times the height of felled trees and the number of trees ha-1 that may be sustainably felled is no more than 5 trees ha-1.

Total Economic Value in Investment Analysis Sudarsono Soedomo
Jurnal Manajemen Hutan Tropika Vol. 19 No. 3 (2013)
Publisher : Institut Pertanian Bogor (IPB University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (518.709 KB)

Forest ecosystems are often defeated in decisions about investment and economic development. There is a very wide gap between policy makers and development investment on the one hand and environmentalists on the other hand, who see the forest ecosystem from the perspective of ecology and environment. The first party considers that forest ecosystems have a low value, while the second party often shows very fantastic figures about the economic value of forests. From the second party's point of view, the first party could be ignorant or having a short-term interest; while from the first party's point of view, the second party loves to produce the figures that are too good to be true. As a result, the total economic value of ecosystems is not only ignored as a consideration in investment decisions, but the total economic value of ecosystems has been seen as a boring scientific joke. Why did the gap occur and how to close the gap will be discussed in this paper. Economic valuation of ecosystem needs to be done more realistically so that the results are more plausible before policy makers. On the contrary, policy makers need to be aware that once a species vanished it never goes back.Keywords: ecosystem, goods and services, value, trade-off, double counting DOI: 10.7226/jtfm.19.3.201

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