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Departemen Silvikultur, Fakultas Kehutanan - Institut Pertanian Bogor Jl. Ulin Kampus IPB Darmaga, Bogor 16680 INDONESIA Telp./Fax.: +62-251-8626806 /+62-251-8626886
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Jurnal Silvikultur Tropika (JST)
Published by Institut Pertanian Bogor
ISSN : 20868227     EISSN : 28073282     DOI : -
Core Subject : Science, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Energy Environmental Science Social Sciences
JURNAL SILVIKULTUR TROPIKA (JST) atau Journal of Tropical Silviculture adalah jurnal yang terbit tiga kali dalam setahun. JST menerbitkan artikel tentang sains dan teknologi silvikultur yang berhubungan dengan hutan tropika seperti botani, fisiologi, ekologi, tanah, genetika, proteksi, patologi, entomologi, kebakaran, daerah aliran sungai, biodiversitas, bioteknologi, agroforestri, reklamasi dan restorasi. Tulisan-tulisan ilmiah diterbitkan dalam bentuk artikel hasil-hasil penelitian (article), ulas balik (reviews), catatan penelitian (notes), hipotesa (hypothesis), maupun komunikasi (communication) di bidang silvikultur hutan tropika.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Kehutanan
Articles 492 Documents
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Application of Linear Goals Programming Optimization Models in Determining The Optimal Configuration of Land Use at The Upper Citarum Watershed Omo Rusdiana; R. Rodlyan Ghufrona
Jurnal Silvikultur Tropika Vol. 2 No. 1 (2011): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.2.1.%p

Abstract

Various natural disasters such as floods and landslides that much happening at this time caused by environmental damage, esppecially upper watershed damage. Actual land use of forests in the Upper Citarum Watershed area is only 16.20%, still not meet the minimum area of forest (30%) base on UU No. 41/1999 about Forestry. Actual land use configuration in study site causes most of the region is dominated by the level of erosion hazard very heavy; total RTH covering 76.75% total study site; and approximately 58.25% of farmer households unable to meet minimum standards for decent living needs. By applying a multiple target linear optimization model Linear Goals Programming (LGP) that solved by General Algebraic Modeling System (GAMS) optimization software, recommended the optimal configuration of land use that can meet the ecological and economic objectives. These recommendations can decrease the erosion rate of 94.13% and reaching 72.97% areas that meet standards of TSL; reaching an area covering 87.39% of RTH; and increasing aggregate sector of food crops, plantations, and forestry farm household income amount 220.83%. Optimization model in this study are static models that do not pay attention to time, but this models produces marginal values and we can analyze the value of elasticity (Sensitivity Analysis) that can be known implications for optimization purposes in case of changes in conditions of objective optimization.
The Potency of Jarak Pagar (Jatropha curcas Linn) as a Fuel Break Based on Canopy Condition Lailan Syaufina; Nurheni Wijayanto; Istomo Istomo; Yuli Sunarti
Jurnal Silvikultur Tropika Vol. 2 No. 1 (2011): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.2.1.%p

Abstract

It is assumed that Jarak pagar (Jatropha curcas Linn) has potency for fuel break in forest fire control.  However, it needs to be evaluated in effectiveness of the function.  One of the requirement as fuel break is crown condition in which the plant crown need to have good performance in covering the area to prevent fire sppread. A study was conducted to analyze whether Jarak pagar meets the requirement for fuel break or not.  Some sample plots were established in forest plantation area of Gunung Hambalang, Bogor managed by Perhutani.  The study resulted that Jarak pagar in the study area does not meet the requirement for fuel break of which a good performance of crown is not shown.  It seems that soil characteristics influenced the result. 
Study on Alfa-Amylase Inhibitor in Sengon (Paraserianthes falcataria (L) Nielsen) Trees, of Kediri, Solomon and Subang Provenances Ulfah Juniarti Siregar; Puti Awali Saimima
Jurnal Silvikultur Tropika Vol. 2 No. 1 (2011): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.2.1.%p

Abstract

Sengon  (Paraserianthes falcataria (L) Nielsen) is one of potential tree to develop because of its diverse benefits. At present, sengon plantation suffer from serious attack by stem borer (Xystrocera festiva Pascoe), known as boktor. It was known that boktor digestive tract contains α-amylase enzyme, sengon trees have α-amylase inhibitor. It is necessary to study the nature of α-amylase inhibitor in sengon tree to produce superior clone of sengon, which contains highest  α-amylase inhibitor activity and resistant to stem borer.The purpose of this study is to determine different level of α-amylase inhibitor activity from three provenances of Kediri, Solomon and Subang, both in the bark and stem of healthy and heavily attacked trees. It also compared the activity of α-amylase inhibitor using synthetic and natural enzymes from the digestive gut of boktor larvae. Plant materials were woods and barks of sengon trees from provenances of Kediri, Solomon, and Subang, which were made into powder. Two types of tree were selected, i.e. healthy and severely attacked trees. Observation of α-amylase inhibitor activity was carried out using the α-amylase synthetic enzyme (SIGMA, 320 U/mg) and natural enzymes from the digestive tract of boktor larvae, size 3.5 cm. The data were analyzed in a Complete Randomized Factorial Design (CRFD) with three factors, i.e. provenance, condition of the tree, and different tree tissue, using SPSS 18.0 software. Analysis of variance using synthetic enzymes showed that tree conditions and tissues have highly significant influence on the activity of α-amylase inhibitor, while in the other hand provenance factor did not. The trees stem (29,4751 AUI/mg) had a higher α-amylase inhibitor activity than in trees bark (41.932 AUI / mg). The average of α-amylase inhibitor activity in healthy trees (28,5689 AUI/mg) higher than in the attacked trees (25,6894 AUI/mg).Analysis of variance using natural enzymes showed that tree conditions and provenance have highly significant influence on the activity of α-amylase inhibitor. Subang provenances had a highest average of α-amylase inhibitor activity compared to other provenances that is equal to 55.2956 AUI / mg. Then the average α-amylase inhibitor activity in healthy trees stem (59.7946 AUI / mg) was higher than the activity of α-amylase inhibitor on severely attacked trees stem (41.932 AUI / mg).
Natural Succession After Fires at Secondary Forest in Fatuquero Village, Railaco District, Ermera Regency-Timor Leste Bambang Hero Saharjo; Cornelio Gago
Jurnal Silvikultur Tropika Vol. 2 No. 1 (2011): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.2.1.%p

Abstract

Forest is unvaluable resourses which there in have biodiversity as germplas resources, forest product such as wood and non-wood, regulator of the water system, preventing flooding and erosion. Disruption of forest resources is still continues, even it’s increasing in a year to year. That damage caused by forest fires is one part of disruption are becoming more frequent. The negative impact caused by large fires is large enough to covering ecological damage, reduced biodiversity, reduced the economic value of forest and soil productivity, and also global climate change. This study aims to determine the development of natural succession after fires at secondary forest.
Shading Influence of Stand Sengon (Paraserianthes falcataria (L.) Nielsen) on Growth Porang Plants (Amorphophallus onchophyllus) Wijayanto, Nurheni; pratiwi, Emma
Journal of Tropical Silviculture Vol. 2 No. 1 (2011): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.2.1.%p

Abstract

Sengon have a light canopy. Porang plant is resistant shade plants. So that these plants can be incorporated in the system agrofrestry. The purpose of this study was to examine the influence of shading intensity on plant growth porang. The experimental design used randomized block design. Group consists of stands with a canopy sengon 30% and 80%. Porang plants fertilized with organic fertilizer. Porang plant parameters were observed: plant height, crown diameter, tuber fresh weight, dry weight of canopy, root dry weight, bulb diameter, and biomass.The results showed that the intensity of the shade 30% performed better than the 80% shading intensity on plant growth porang.  Therefore, it stands 30% sengon shade plants porang potential for development.
The Effects of Rootone-F Plant Growth Regulators on the Growth of Duabanga mollucana. Blume Cuttings Supriyanto Supriyanto; Kaka E. Prakasa
Jurnal Silvikultur Tropika Vol. 2 No. 2 (2011): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.2.2.%p

Abstract

Wood shortage supply from natural forest effected the running of wood-based industry. Therefore forestry entrepreneurs began to switch from also growing tree species to fast growing tree species. Duabanga moluccana Blume is one type of native tree in Indonesia who can growing  fast and have good characteristics for industrial raw materials. Multiplication of Duabanga mollucana can be planting by seeds and also by vegetative propagation. Shoot and stem cuttings is one alternative was to obtain plantation in sufficient quantities and in sort time. The addition of plant growth regulators (Rootone - F) was expected to increase the percentage of rooted materials cuttings and the survival percentage.
Soil Quality on area of Selective Cutting and Strip Planting System (TPTJ) in IUPHHK/HA PT. Sari Bumi Kusuma Central Kalimantan Province Prijanto Pamoengkas; Adytia Pradnya Murti
Jurnal Silvikultur Tropika Vol. 2 No. 2 (2011): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.2.2.%p

Abstract

Rapid forest exploitations can cause forest degradation, and eventually may cause the global climate change, because of that, the balance of the forest sustainability must be kept as well. The implementation of silviculture system called Selective Cutting and Strip Planting System is one of several forest harvesting method that consider the importance of forest sustainability. Practically, the system has never been tested to the last cycle. So, it is necessary to conduct some evaluation to the method to assure its sustainability. Estimation of soil quality is one of several ways to evaluate the effectiveness of silviculture implementation on a forest area, Since the soil is one of the major factor that influencing the growth of vegetations, then its quality can be used as an indication of conservation of forest productivity. 
The Growth of Jabon (Anthocephalus cadamba Roxb. Miq.) in Less Optimum Environment and Its Respons to Fertilizer Application Irdika Mansur; Surahman Surahman
Jurnal Silvikultur Tropika Vol. 2 No. 2 (2011): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.2.2.%p

Abstract

Jabon (Anthocephalus cadamba Roxb. Miq.) is one kind of industrial tree that grows fast (fast growing species), as a producers of wood to meet the demands of Indonesian timber which continues to increase. In the 70's 100% wood industry in Indonesia only rely on natural forests as a source of supply. The rate of degradation natural forests continues to increase causing sharply reduced timber supply. Jabon is one kind of superior wood that can be developed through Industrial Plantation Forest and the Community Forest. However, the silviculture information in its development is still limited, especially the profit of advanced fertilization and selection area. The aim of this study was to determine the growth of jabon in less optimum environment (poor drainage and under shade conditions), to determine the influence of fertilizer application on the growth of jabon and to get the optimum dose of fertilizer application.
Effect of addition of banana stem compost on the growth of jabon (Anthocephalus cadamba Miq.) seedlings growth Arum Sekar Wulandari; Irdika Mansur; Helga Sugiarti
Jurnal Silvikultur Tropika Vol. 2 No. 2 (2011): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.2.2.%p

Abstract

Addition of compost could increase plant growth. Compost derived from banana stem could be added as admixture in nursery medium for growing jabon seedlings.  This research studied the effect of addition of various composts on the growth of jabon  (Anthocephalus cadamba Miq.) seedlings. The objectives of this study were: (1) to test the quality of compost produced from banana stem in improving the growth of jabon seedlings, and  (2) to learn the effect of composts from banana stem and other composts existing in the market (Ofer, Cocopeat, Guano and  Andam) on the growth of jabon seedlings.
The Influence of Storage Media, Storage Room, and Time of Storage on Propagules Viability of Rhizophora stylosa Griff Cecep Kusmana; Muhammad Kalingga F; Dida Syamsuwida
Jurnal Silvikultur Tropika Vol. 2 No. 2 (2011): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.2.2.%p

Abstract

Indonesia as an archipelagic country has a coastline and partly overgrown with mangrove forest which is the dominant type of coastal areas. However, at present the mangrove forests have been degraded which causes a decrease in forest potency. The effort that can be done to improve the return potential of these mangrove forests is by rehabilitation of mangrove forest.  Rhizophora sp., including the type of  Rhizophora stylosa Griff., is a pioneer tree species in the mangrove forest which has an important meaning in the mangrove forest etablishment. The main problem of this type of R. Stylosa that is the seed classified into the recalcitrant ones. Therefore, the technique of seed storage is a very important activity to be developed for supporting the success of mangrove rehabilitation activities that have been degraded. The purpose of this study is to discover the influence of storage media, storage room, and time of storage on the propagule viability of R. stylosa, and to compare the R. stylosa propagule germination potential between cutting test and directly propagule germination test results. The research was conducted at the greenhouse and Silviculture Laboratory, Faculty of Forestry IPB and Seed Technology Research Institute Laboratory (BPTP), Bogor.

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