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INDONESIA
Jurnal Sylva Lestari
Published by Universitas Lampung
ISSN : 23390913     EISSN : 25495747     DOI : https://doi.org/10.23960
Core Subject : Science, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Energy Environmental Science Materials Science & Nanotechnology
Jurnal Sylva Lestari (JSL) [P-ISSN 2339-0913 | E-ISSN 2549-5747] publishes original research articles related to all aspects of forestry and environmental sciences which includes, but not limited to the following topics: forest and natural resources management, biodiversity conservation and management, wood science and timber technology, agroforestry and social forestry, forest products and services, and socio-economics of natural resources. It is primarily a medium for disseminating original theoretical and experimental researches, as well as technical reviews. This journal issues one volume annually consist of three issues that delivered every January, May, and September.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Kehutanan
Articles 8 Documents
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Search results for , issue "Vol. 14 No. 2 (2026): May" : 8 Documents clear
The Role of Sibolangit Nature Tourism Park in Climate Change Mitigation: Aboveground Biomass, Carbon Stock, and CO2 Equivalent Ulfa, Mariah; Harahap, Moehar Maraghiy; Ritonga, Yusran E; Siregar, Astri Winda; Wirabuana, Pandu Yudha Adi Putra; Ginting, Ida Mallia
Jurnal Sylva Lestari Vol. 14 No. 2 (2026): May
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v14i2.1391

Abstract

Carbon dioxide (CO2) is the main greenhouse gas, and its atmospheric concentration continues to increase. Globally, in 2019, the average CO2 at Earth’s surface reached 409.8 ppm. Information on carbon storage remains a strategic issue for sustainable forest management and climate change mitigation. Sibolangit Nature Tourism Park is a 24.85 ha conservation area with high biodiversity and a range of potential environmental services. This study aims to quantify the aboveground biomass, carbon stock, and CO2-equivalent emissions in the Sibolangit Nature Tourism Park. The study used 5% intensity sampling, resulting in 31 plots selected using simple random sampling. The plot size was 400 m2 (trees), 100 m2 (poles), 25 m2 (saplings), and 4 m2 (seedlings). The vegetation species, height and diameter at breast height were recorded to measure the biomass of trees, poles, and saplings. The aboveground biomass of vegetation was estimated using a non-destructive method with Chave’s allometric equation, while the biomass of seedlings was calculated using a destructive method according to SNI 7724-2019. The carbon stock was measured by multiplying the biomass by 0.47. The carbon stock value was then converted to CO2-equivalent using a conversion factor of 3.67. The results showed that Sibolangit Nature Tourism Park had an aboveground biomass of 525.73 t/ha, a carbon stock of 247.09 t C/ha, and a total carbon stock of 6140.30 t C, equivalent to 906.84 t CO2/ha. The study site had potential as an atmospheric CO2 absorber, indicating its primary role in climate change mitigation and in the FoLU Net Sink 2030 program. Keywords: allometric equation, conservation area, global warming, Sibolangit Nature Tourism Park, tropical forest
Disempowered on Household Plots: A Study on Gendered Division of Labor in Small-Scale Agroforestry Practices in Lamala Sub-District, Banggai Regency, Indonesia Lawasi, Moh Andika; Septina, Ane Dwi; Yusnikusumah, Tri Rizkiana; Pratama, Boby Bagja; Pratiwi, Dian; Humaida, Nida; Suli, Andreas Aprilano Thomas
Jurnal Sylva Lestari Vol. 14 No. 2 (2026): May
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v14i2.1411

Abstract

Understanding gender aspects in the management of small-scale agroforestry is important to creating an inclusive and sustainable model in subsistence agriculture. This research aimed to analyze the actualization of the gender dimension in productive, reproductive, and social-political activities in small-scale agroforestry management among subsistence farmer groups in Lamala Sub-District, Banggai Regency, Indonesia. The study employed a mixed-methods case study approach using the Harvard Analytical Framework (HAF) to analyze the gender-based division of labor, integrating observations, interviews with 5 key informants, and a questionnaire administered to 50 respondents. The data collected were then analyzed thematically and descriptively. The results showed a gender imbalance in the management of small-scale agroforestry. HAF mapping indicated that women were involved in only 52.63% of the identified productive activities, whereas men were involved in all productive activities. In contrast, women carried out all identified reproductive activities, while men were involved in only 33.33% of them and only occasionally. In socio-political activities, women were involved in 66.67% of the identified activities, again only occasionally, whereas men were involved in all activities and dominated 66.67% of them. These findings suggest that small-scale agroforestry is not gender-neutral, as its productive, reproductive, and socio-political activities are structured through unequal gender relations. This research recommends education for small-scale farmers on gender and productivity, helping the community understand gender equality in efforts to improve access, productivity, and outcomes through equitable, egalitarian role distribution. Keywords: agroforestry, community empowerment, gender equality, Harvard Analytical Framework, subsistent farmer
Identification of Key Actors in the Conservation of Amorphophallus gigas in North Sumatra Using the MACTOR Method Rambey, Ridahati; Rahmawaty; Rauf, Abdul; Nababan, Esther Sorta Mauli; Ismail, Mohd Hasmadi; Suratman, Mohd Nazip
Jurnal Sylva Lestari Vol. 14 No. 2 (2026): May
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v14i2.1255

Abstract

Indonesia’s tropical forests harbor exceptional plant diversity; however, rising global demand for forest-based commodities is intensifying extraction and increasing the risk of extinction. In North Sumatra, Amorphophallus gigas persists within community-managed agroforestry understorey systems, yet a surge in tuber demand since 2019 has accelerated harvesting and expanded trade networks from local collectors to export markets. These pressures threaten the species and highlight the need to identify and coordinate key actors in governing sustainable harvesting and habitat management. This study applies a prospective mixed qualitative–quantitative approach, combining in-depth interviews with farmers, village authorities, collectors, government agencies, academics, non-governmental organizations, industry representatives, and exporters. The MACTOR method was used to assess actor influence and dependence and to map convergence and divergence across three objectives: species conservation, agroforestry habitat protection, and income-oriented cultivation. Results indicate that the Center for Conservation of Natural Resources (BBKSDA) North Sumatra is the most influential and least dependent actor, while farmers remain highly dependent despite managing most habitats on private land. Habitat protection is the most mobilizing objective but shows substantial divergence, reflecting unresolved trade-offs between conservation and cultivation. These findings underscore governance imbalances and the need for inclusive, adaptive strategies, including farmer incentives, capacity building, formalized harvesting rules, and synergies between ex situ conservation and sustainable agroforestry. Keywords: actor, Amorphophallus gigas, conservation, MACTOR, Sustainability
Urban Forest Ecosystem Approaches to Mitigating Urban Heat Island Effects Husen, Osu Oheoputra; Hasddin; Ishak, Alfian; Tiro, Ahmad Haeruddin; Hidayat, Johri; Sumarata, De Naddya Yaumil Fadillah; Akeo, Jei
Jurnal Sylva Lestari Vol. 14 No. 2 (2026): May
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v14i2.1354

Abstract

The urban heat island phenomenon has become a major concern for medium-sized tropical coastal cities, driven by interactions among land-use change, increasing building density, and the effectiveness of spatial planning. This paper examines how urban forest distribution and building density relate to urban heat island intensity using an urban ecology framework, remote sensing-based spatial analysis, including normalized difference vegetation index (NDVI), normalized difference built-up index (NDBI), and land surface temperature (LST), and spatial planning policy evaluation. The study combines Landsat imagery (2015–2023) with spatial planning documents, green space data, and stakeholder interviews. LST was obtained from NDVI-based emissivity-corrected digital number temperature-radiation-brightness conversion, and linear regression was used to determine the impact of NDVI and NDBI on LST. Based on the research findings, the two cities show different LST patterns. In Baubau, the temperature rise is largely influenced by building density, meaning the denser the buildings, the hotter the city becomes. In Kendari, on the other hand, temperature changes are more strongly influenced by vegetation density. Important ecological features, such as urban forests, mangrove forests, and coastal vegetation, remain scattered along the city’s outskirts. Their existence has not been fully integrated into urban spatial planning. As a follow-up to these findings, we emphasize the need for ecosystem-based measures to tackle the urban heat island effect. This includes tightening regulations on building density and green open spaces through permitting systems, as well as preserving remaining vegetation while developing well-integrated green corridors. Keywords: Baubau, building intensity, green open space, Kendari, land surface temperature, urban ecology
Land Cover Change and Ecosystem Services Trade-Off in the Tiworo Watershed: Implications for Forest Conservation and Watershed Management Kasim, Safril; Hasddin; Fariki, La; Agarwal, Abhishek
Jurnal Sylva Lestari Vol. 14 No. 2 (2026): May
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v14i2.1321

Abstract

This study evaluates the spatio-temporal dynamics of land-cover change and their implications for the sustainability of ecosystem services in the Tiworo Watershed, Southeast Sulawesi, Indonesia, using an integrated ecological–economic framework. The analysis combined land cover datasets from 2014, 2019, and 2024 with sectoral gross regional domestic product (GRDP) data for agriculture, forestry, and fisheries, and applied the Tapio decoupling model to assess the relationship between economic growth and ecological pressure. Results revealed substantial expansion of built-up areas, plantations, and aquaculture ponds, primarily at the expense of mangrove forests and wetlands. Mangrove cover declined from 431.61 ha in 2014 to 306.77 ha in 2024, indicating increasing pressure on coastal ecosystems. Despite these changes, secondary dryland agriculture and forest areas remained relatively stable, suggesting partial resilience of the watershed landscape. Economically, the agriculture, forestry, and fisheries sector consistently contributed 38–41% of regional GRDP, confirming its strategic importance to local livelihoods and regional development. Decoupling analysis demonstrated absolute decoupling during 2014–2019 and 2014–2024, while relative decoupling occurred during 2019–2024, indicating that economic growth increasingly outpaced ecological degradation. However, localized ecosystem degradation, particularly in mangrove areas, remains a critical concern. These findings highlight that the Tiworo Watershed is transitioning toward more resource-efficient development, although long-term sustainability depends on adaptive watershed governance, stricter protection of vulnerable ecosystems, improved land-use planning, and strengthened community-based forest management. The study provides empirical evidence supporting the application of decoupling analysis at the tropical micro-watershed scale and contributes to the development of integrated forest and watershed management strategies in data-limited regions. Keywords: ecosystem services, forest management, land cover change, Tapio decoupling, Tiworo Watershed
Enhancing Dimensional Stability of Sengon Wood through Synergistic Citric Acid-Glycerol Cross-Linking and SiO2/TiO2 Nanocomposite Impregnation Sartika; Rahayu, Istie Sekartining; Darmawan, Wayan; Yunianti, Andi Detti; Prihatini, Esti; Laksono, Gilang Dwi; Ismail, Rohmat
Jurnal Sylva Lestari Vol. 14 No. 2 (2026): May
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v14i2.1372

Abstract

Sengon wood (Falcataria moluccana) is a fast-growing, low-quality species. In this research, nanoparticle-based impregnation was used to improve the quality and characteristics of sengon wood. SiO2 nanoparticles derived from bamboo leaves were synthesized using the sol-gel method, while TiO2 nanoparticles and SiO2/TiO2 nanocomposites were synthesized using the hydrothermal method. A mixture of citric acid, glycerol, and nanoparticles (SiO2, TiO2, and SiO2/TiO2 composite) was formulated as an impregnation solution at 1% concentration. Sengon wood impregnation was conducted using a vacuum-pressure method. The physical properties tested included weight percent gain (WPG), bulking effect (BE), anti-swelling efficiency (ASE), water uptake (WU), and density. The size of the synthesized nanoparticles was analyzed using a particle size analyzer (PSA). The impregnated sengon wood was characterized using Fourier transform infrared spectroscopy (FTIR) to identify functional groups and X-ray diffraction (XRD) to determine the degree of crystallinity. PSA analysis showed that the material used in the impregnation process is nanoscale (< 100 nm) and exhibits the best dispersion stability in the SiO2/TiO2 nanocomposite. Nanoparticle-impregnated sengon wood exhibited reduced WU and improved dimensional stability compared to untreated samples, especially in citric acid-glycerol and composite nanoparticle treatments. FTIR analysis identified the formation of ester bonds and the reduction of hydroxyl groups, and XRD analysis showed a decrease in crystallinity upon impregnation with nanoparticles and a citric acid-glycerol mixture. Overall, the use of citric acid-glycerol with the nanocomposite showed effectiveness in improving the dimensional stability and physical properties of sengon wood. Keywords: citric acid-glycerol, dimensional stability, sengon, SiO2/TiO2 nanocomposite, wood modification
A Trilogy Framework of Forest Training Governance in Indonesia: Integrating Training, Tenurial Conflict, and Protection in Multi-Mandate Systems Labahi, Pemilu Arman; Mujetahid, Andi; Yusran; Sahide, Muhammad Alif K
Jurnal Sylva Lestari Vol. 14 No. 2 (2026): May
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v14i2.1427

Abstract

Forest training areas increasingly operate under multiple management mandates that simultaneously require capacity building, conflict governance, and forest protection, yet their interactions remain underexplored in the forest governance literature. This study examines the compatibility of multi-mandate forest governance in a forest training area in Indonesia. Using a qualitative case study approach, data were collected through interviews, document analysis, and observations. The study develops a trilogy framework of forest training governance that conceptualizes management as the interaction of training functions, tenurial conflict governance, and forest protection. The findings show that these mandates are neither inherently synergistic nor entirely conflicting. Their compatibility depends on governance arrangements, including institutional coordination, leadership capacity, and community engagement. Training activities can support forest protection through increased field presence, yet may intensify social tensions when access overlaps with contested land uses. Conflict governance plays a mediating role in shaping the legitimacy of protection measures and the effectiveness of training. This study contributes to the forest governance literature by offering an analytical framework for understanding multi-mandate compatibility in forest training areas and by providing policy-relevant insights for managing special-purpose forest areas. Keywords: forest governance, forest protection, multi-mandate management, tenurial conflict
Enhancing Pine Resin Productivity through Sulfuric Acid–Modified ETRAT Stimulants under Operational Conditions in Pinus merkusii Stands Santosa, Gunawan; Matangaran, Juang Rata; Darmawan, Ryan; Alamsyah, Darwis; Sari, Rita Kartika
Jurnal Sylva Lestari Vol. 14 No. 2 (2026): May
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v14i2.1454

Abstract

Pine resin is an important non-timber forest product in Indonesia; however, the productivity of Pinus merkusii tapping remains relatively low and has not yet met industrial demand. This study evaluated the effect of a sulfuric acid–modified ETRAT stimulant on pine resin productivity under operational tapping conditions in Perum Perhutani forests in Central Java, Indonesia. Resin tapping was conducted on 160 trees distributed across four age classes (AC III–VI) using a randomized block design with four stimulant treatments: ETRAT, ETRAT + 5% H2SO4, ETRAT + 10% H2SO4, and a control without stimulant. Resin yield was monitored over 10 consecutive tapping periods, with intervals of 3 days. Resin productivity exhibited temporal variation across tapping periods, with generally lower yields during the initial tapping periods, increasing toward the intermediate periods, and declining slightly thereafter; however, differences among tapping periods were not statistically significant. Stimulant treatment significantly affected resin productivity. The highest productivity was achieved with ETRAT + 5% H2SO4 (11.29 g/quarre/day), representing an approximately 78% increase compared to the control (6.34 g/quarre/day). The addition of 10% H2SO4 did not further improve productivity, suggesting potential physiological stress associated with excessive acidity. Productivity also differed among age-class blocks, with the highest values observed in AC V and AC VI, although these differences likely reflected combined stand-level effects, including stand density and site conditions.  These findings demonstrate that low-concentration sulfuric acid modification can enhance the operational performance of organic stimulants by improving ethylene-mediated resin flow while maintaining tree physiological tolerance. These results provide practical implications for improving pine resin productivity in tropical production forests under operational management conditions. Keywords: age class, ETRAT, pine resin productivity, stimulants, sulfuric acid

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