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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.

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Articles 10 Documents

Search results for , issue "Vol. 19 No. 2 (2013)" : 10 Documents clear

Floristic Composition of Groundcover Vegetation after the 2010 Pyroclastic Fire on Mount Merapi Sutomo Sutomo; Dini Fardila
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 (994.759 KB)

Mount Merapi with its Merapi-type pyroclastic flows provides burnt and unburnt areas which are excellent to study establishment events of pioneer plant species. Using site comparison approach, floristic composition was studied, and thus an area that was burnt by pyroclastic flows in 2010 (Kalikuning) and another area that is relatively intact or unburnt (Kaliurang) was chosen as study sites. We found 7,817 individuals belonging to 72 species and 36 families in the burnt site, and 4,093 individuals belonging to 79 species and 39 families in the unburnt site. The most important family as determined by the Family Importance Value (FIV) was Rubiaceae in Kalikuning and Asteraceae in Kaliurang. In terms of Importance Value Index (IVI), Borreria occimoides (Rubiaceae) and Eupatorium riparium (Asteraceae) were the most important species in Kalikuning and Kaliurang, respectively. Multivariate approach using Non-metric Multidimensional Scaling ordination technique showed that floristic composition in the newly burnt site were different with those that occupying the intact site (RANOSIM = 0.72). Borreria occimoides, Eupatorium riparium, Athyrium dilatatum, Paspalum conjugatum, Brachiaria reptans, and Selaginella doederleinii were the species mainly responsible in explaining the differences between sites. DOI: 10.7226/jtfm.19.2.85

Recuperation of Non-commercial Trees in Logged Forest in Southern Papua, Indonesia Agustinus Murdjoko
Jurnal Manajemen Hutan Tropika Vol. 19 No. 2 (2013)
Publisher : Institut Pertanian Bogor (IPB University)

Someparts of forest in southern Papua Indonesia is used as production forest. Therefore, cutting is one of factors which has impact to population of trees. Research was done to see recuperation of non-commercial species (Actinodaphne nitida, Blumeodendron sp.) in logged area. Integral Projection Models (IPMs) were applied to analyze population dynamics of the 2 species. Mortality, growth, fecundity, autocorrelation of growth were included in IPMs. Data were collected from 3 permanent sample plots (3 ha) between 2005-2009 in PT. Tunas Sawaerma, Assiki, and Boven Digul. Data showed a significance in autocorrelation of growth. In this research, IPMs can be used to describe recuperation of the tree species. Population dynamics occur in which trees have the same survival probability among diameter size, while growth of trees and autocorrelations contribute to the change of population structure of trees. Elastisity test of growth autocorrelation pointed out that A. nitida and Blumeodendron sp remain to grow faster over time and have a larger contribution to population growth than other species. In addition, the more faster-growing individuals will have the more significant contributions for population growth rate of A. nitida and Blumeodendron sp.

Arbuscular Mycorrhizal Fungi and Biochar Improved Early Growth of Neem (Melia azedarach Linn.) Seedling Under Greenhouse Conditions Sri Wilarso Budi; Luluk Setyaningsih
Jurnal Manajemen Hutan Tropika Vol. 19 No. 2 (2013)
Publisher : Institut Pertanian Bogor (IPB University)

The objective of this research was to determine the effect of biochar on the seedling quality index and growth of neem tree seedlings and arbuscular mycorrhizal fungi (AMF) development grown on ultisol soil medium. Two factors in completely randomised experimental design was conducted under green house conditions and Duncan Multiple Range Test was used to analyse the data. The results showed that neem seedling quality index was improved by interaction of AMF fungi and biochar amandment. The growth of neem seedling was significantly increased by interactions of arbuscular mycorrhizal fungi and biochar. The combination treatment of Glomus etunicatum and biochar 10% gave best results of height and diameter, and significantly increased by 712% and 303% respectively, as compared to control plant, while the combination treatment of Gigaspora margarita and biochar 10% gave the best result of shoot dry weight, and root dry weight and significantly increase by 4,547% and 6,957% as compared to control plant. The mycorrhizal root colonization was increased with increasing biochar added, but decreases when 15% of biochar was applied. N, P, and K uptake of 12 weeks neem seedling old was higher and significantly increased as compared to control plant.

Development of Small Holder Plantation Forests: An Analysis from Policy Process Perspective Hariadi Kartodihardjo; Bramasto Nugroho; Didik Suhardjito; Ahmad Dermawan
Jurnal Manajemen Hutan Tropika Vol. 19 No. 2 (2013)
Publisher : Institut Pertanian Bogor (IPB University)

This research was conducted to learn the inhibiting factors for renewal of forest utilization policy, particularly the policy of small holder plantation forests/HTR), by government. To achieve the objective of this research, there were studies on contents of law and regulations, respond of stakeholders toward those law-regulations, and problem of contents and constraints of law and regulations improvement through analysis approach of policy making process. It was found that technical constraints in HTR development were weak provision of forest territory and poor institutional strengthening of the participant community to be ready to receive permit or fund for HTR development. Such phenomena were due to contents of HTR policy which have more tendencies to answer the problem of absence of bureaucracy and administration procedure which should be determined on the basis of authorities of agencies of central and local government, rather than answering the problem faced by HTR participant community. Policy narrative in the past period in implementing large business policy of natural forest utilization were still dominant, accompanied with weak consideration in making and implementing policy toward forest territory conflict and weak socio-economic and bargaining position of the community, resulting in expensive public service which could not fulfill the community's need.

Management Effectiveness of Southeast Aru Islands Marine Conservation Area Fernando Dayandri Willem Dangeubun; Budy Wiryawan; . Mustaruddin; Ari Purbayanto
Jurnal Manajemen Hutan Tropika Vol. 19 No. 2 (2013)
Publisher : Institut Pertanian Bogor (IPB University)

Southeast Aru Islands Marine Conservation Area (SE Aru MCA) has been existed for nearly 21 years, a period that long enough for a timely evaluation about how far improvement of management has been made in the area in question, i.e. whether management has improved situation of local communities and marine resources availability in the area. This study, therefore, aims at assessing management effectiveness and impacts of SE Aru MCA. Results suggest that the MCA, which was originally established as a marine nature reserve (Cagar Alam Laut, CAL) in 1991 and changed status into marine sanctuary in 2009, has not yet produced the expected positive impacts. Assessment using available tools indicated that the management level of SE Aru MCA is at level 1, with percentage of 34.12%, meaning it is still at initiation stage and less effective in terms of management outcomes. Index of conservation area effectiveness with a value of 0.387 shows that the overall conservation area in the 3 categories mentioned above is less effective, therefore conservation effect has not been able to solve area problems. It is concluded that, after more than 20 years exists in the area, few benefits have been produced by SE Aru MCA for local people associated with it and biological resources in it.

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

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