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Gorontalo Journal of Forestry Research
Published by Universitas Gorontalo
ISSN : 26142058     EISSN : 2614204X     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Gorontalo Journal of Forestry Research (GJFR) is a media publication for academics, researchers and practitioners to publish the results of research or scientific articles. GJFR is published 2 (two) periods each year, ie every April and October.
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Articles 96 Documents
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THE POTENTIAL OF Heterotrigona itama BEE BREAD IN INHIBITING THE GROWTH OF PATHOGENIC BACTERIA Suwanti, Tihani Nur Amalina; Arung, Enos Tangke
Gorontalo Journal of Forestry Research Vol. 9 No. 1 (2026): GORONTALO JOURNAL OF FORESTRY RESEARCH VOLUME 9 ISSUE 1 APRIL 2026
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Bacterial infections remain a major problem for Indonesians. Bacterial resistance caused by inappropriate antibiotic use is a major factor in the prevalence of bacterial infections in the community. Therefore, the use of natural ingredients is needed as an alternative to natural antibiotics. One natural ingredient with antibacterial potential is bee bread, produced by the stingless bee species Heterotrigona itama.  The aim of this study was to determine the antibacterial activity contained in Heterotrigona itama bee bread extract in fighting pathogenic bacteria.  The test used the well method. The growth medium used was Mueller Hinton Agar (MHA) with a 24-hour incubation time. The concentrations used were 500, 250, and 125 µg/well.  The percentage and inhibition zone of Heterotrigona itama bee bread extract varied among bacterial species. Based on the diameter of the inhibition zone at a concentration of 500 µg/well, inhibition of gram-positive bacteria tended to be greater than that of gram-negative bacteria.  Bee bread produced by Heterotrigona itama bees has inhibitory activity against five types of pathogenic bacteria.  The results also provide opportunities for further research, including the formulation and production of applicable products.
INVENTORY OF TREES SPESIES AS HOST EPIPHYTIC ORCHIDS AT BALIK BUKIT RESORT, BUKIT BARISAN SELATAN NATIONAL PARK Albarkati, Kurnia; Riniarti, Melya; Yusnita; Safe'i, Rahmat; Dewi, Bainah Sari
Gorontalo Journal of Forestry Research GORONTALO JOURNAL OF FORESTRY RESEARCH VOLUME 9 ISSUE 2 OCTOBER 2026
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gjfr.v9i2.4700

Abstract

Epiphytic orchids are an important component of tropical forest ecosystems, whose existence is strongly influenced by the characteristics of their host trees. This study aimed to inventory host tree species and analyze their preferences in relation to epiphytic orchids at Balik Bukit Resort, Bukit Barisan Selatan National Park. Data collection was conducted in June 2025 using a 150 m line transect method combined with 20 × 20 m quadrat plots at two observation stations. All tree species serving as substrates for epiphytic orchids were identified and recorded. The results revealed 26 host tree species belonging to 18 families that supported 21 epiphytic orchid species. On average, each host tree supported 1.56 orchid species, with Medang (Dehaasia caesia) identified as the host with the highest orchid diversity. The families Myrtaceae, Euphorbiaceae, and Dilleniaceae were the most dominant host tree groups. Host tree preference by epiphytic orchids Epiphytic orchids primarily preferred host trees based on bark texture, water retention capacity, canopy structure, and the presence of mosses and mycorrhizal fungi. These findings highlight the importance of the quality of microhabitats on host trees in supporting the conservation of key tree species that sustain a high diversity of epiphytic orchids.
SOCIO-ECOLOGICAL DETERMINANTS OF THE ENVIRONMENTAL QUALITY INDEX IN JAVA ISLAND: IMPLICATIONS FOR ENVIRONMENTAL POLICY AND FOREST RESOURCE MANAGEMENT Akhmad Yani
Gorontalo Journal of Forestry Research GORONTALO JOURNAL OF FORESTRY RESEARCH VOLUME 9 ISSUE 2 OCTOBER 2026
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gjfr.v9i2.4702

Abstract

This study examines how sectoral and socioeconomic dynamics are associated with the Environmental Quality Index (EQI) in Java, Indonesia, and how these relationships inform environmental governance, land-resource management, and forest-policy-oriented sustainability. Because EQI integrates air, water, and land-cover quality, it provides a policy-relevant indicator for assessing environmental pressure in densely populated regions. Annual panel data for six provinces during 2010-2024 were obtained from official publications of the Ministry of Environment and Forestry and Statistics Indonesia. The model includes GRDP shares of agriculture, mining, manufacturing, transportation, and trade, with per capita income, poverty, population density, and economic growth. Panel regression was estimated using Common Effect, Fixed Effect, and Random Effect models. Model selection was conducted using the Chow, Hausman, and Breusch-Pagan Lagrange Multiplier tests, while final inference applied province-clustered standard errors. The Fixed Effect Model was selected. The results show that per capita income is positively and significantly associated with EQI, whereas economic growth is negatively and significantly associated with EQI. Poverty has a positive and significant coefficient, but this finding should be interpreted cautiously as an aggregate provincial association that may reflect structural heterogeneity, spatial differences in pollution and land-use pressure, and unobserved governance factors rather than a direct causal effect. Sectoral GRDP shares and population density are not significant in the model. The model explains 70.37% of EQI variation. These findings indicate that improving EQI in Java requires stronger governance of growth quality through pollution control, land-use planning, urban environmental services, ecological-function protection, and consistent resource-management policies across provinces.  
THE EFFECTIVENESS OF THE RAWA AOPA WATUMOHAI NATIONAL PARK OFFICE IN MANAGING THE RAWA AOPA WATUMOHAI NATIONAL PARK AREA Darlin, Elsa Damayanti; Rahmah Dzulhajjah
Gorontalo Journal of Forestry Research GORONTALO JOURNAL OF FORESTRY RESEARCH VOLUME 9 ISSUE 2 OCTOBER 2026
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gjfr.v9i2.5213

Abstract

This study aims to analyze the effectiveness of the Rawa Aopa Watumohai National Park Office (BTNRAW) in managing the Rawa Aopa Watumohai National Park (TNRAW), an important conservation area in Southeast Sulawesi with a unique ecosystem and high biodiversity. The research employs a qualitative approach through literature studies, interviews, and SWOT analysis to identify strengths, weaknesses, opportunities, and threats affecting institutional performance. Data are analyzed by linking field findings with the principles of effectiveness in conservation area management. The results show that BTNRAW has several strengths, including adaptive human resource capacity, community empowerment programs, the use of technology such as GPS, drones, and hotspot monitoring systems, and cross-agency collaboration networks. However, there are weaknesses in field human resource availability, limited patrol facilities, high workloads, and the suboptimal implementation of zoning and digital reporting systems. This study concludes that BTNRAW's effectiveness is in the fairly good category but still requires strengthening in data management, human resource capacity, and multi-stakeholder coordination. The resulting strategic recommendations can serve as a basis for sustainable improvement of TNRAW governance.
EVALUATION OF THE CHARACTERISTICS OF LEUCAENA STEM (Leucaena leucocephala) CHARCOAL FROM ANIMAL FEED WASTE IN WEST SULAWESI Zulkahfi, Zulkahfi; Irundu, Daud; Niger, Vanto; Parenden, Novita Sari; Nurfadilla, Nurfadilla
Gorontalo Journal of Forestry Research GORONTALO JOURNAL OF FORESTRY RESEARCH VOLUME 9 ISSUE 2 OCTOBER 2026
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gjfr.v9i2.4607

Abstract

Current energy use still relies on fossil fuels, the use of which can cause pollution and greenhouse gases. One alternative that can replace these materials is biomass. One potential material is leucaena stem, which is processed into charcoal. Therefore, the purpose of this study is to evaluate the characteristics of leucaena stem charcoal using the complete pruning technique in West Sulawesi. This study used appropriate tools and materials to produce leucaena stem charcoal and liquid smoke, observed the microscopic characteristics, tested the moisture and ash content, and tested the calorific value of leucaena stem charcoal. The results showed that there were deposits in the pores, causing the dead stem to be harder and producing fewer cracks in the charcoal product. The yield of charcoal and liquid smoke is inversely proportional, where the highest charcoal yield is in dead stem samples at 36.59% with the lowest liquid smoke yield at 28.57%. In addition, the lowest average moisture content was detected in dead leucaena stem charcoal at 0.2%, while the highest ash content was detected in the same charcoal at 2.9%. The highest calorific value of leucaena stem charcoal was found in the 5-time pruning treatment at 34.50 KJ/g. In general, the chemical properties of leucaena stem charcoal are of high quality and comply with Indonesian national standards
APPLICATION OF ROBUSTA COFFEE PLANT CULTIVATION IN AGROFORESTRY, MAMASA REGENCY Amirudin; Mukti, Jauhar; Maulana, Zulkifli; Fhilesia
Gorontalo Journal of Forestry Research GORONTALO JOURNAL OF FORESTRY RESEARCH VOLUME 9 ISSUE 2 OCTOBER 2026
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gjfr.v9i2.5215

Abstract

This study examines the implementation of Robusta coffee agroforestry by the KTH Kanan Hijau Lestari in Mamasa Regency, Indonesia. The research addresses challenges related to traditional cultivation practices, low coffee productivity (131 kg/ha/year), and limited product diversification. It aims to identify the agroforestry model, analyze factors affecting productivity, and assess opportunities for developing value-added coffee products. A qualitative approach was employed through field observations, in-depth interviews, questionnaires, and document analysis. The findings indicate that the farmer group applies a random-mixture agroforestry system, integrating Robusta coffee with companion tree species, predominantly avocado (32%) and cempaka (15%), using planting distances ranging from 1 × 2.5 m to 2.5 × 2.5 m. Productivity is constrained by the intensive use of inorganic fertilizers, non-selective harvesting, inadequate post-harvest handling, and limited processing facilities. Product diversification remains limited due to insufficient technical knowledge, inadequate equipment, and weak market access. However, opportunities exist to develop value-added products, particularly ground coffee and drip bag coffee, through technical training, technology support, and improved processing infrastructure. Strengthening farmers' capacity, promoting sustainable cultivation practices, and expanding market access are essential to improve productivity, increase economic value, and ensure the long-term sustainability of Robusta coffee agroforestry systems.

Page 10 of 10 | Total Record : 96

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