JURNAL FORESTRINDO (JForIn) atau Journal of Indonesian Forestry adalah jurnal yang terbit dua kali dalam setahun, yaitu setiap bulan Juni dan Desember. JForIn menerbitkan artikel tentang sains dan teknologi pengelolaan hutan tropika, terutama yang berhubungan dengan perencanaan hutan, hidrologi hutan, kebijakan kehutanan, sosial dan ekonomi kehutanan serta pemanfaatan sumber daya hutan. Tulisan-tulisan ilmiah diterbitkan dalam bentuk naskah hasil penelitian (article), ulas balik (reviews), catatan penelitian (notes), hipotesa (hypothesis), maupun komunikasi (communication) di bidang pengelolaan hutan tropika.
Departemen Manajemen Hutan Fakultas Kehutanan dan Lingkungan IPB
Penulis yang menerbitkan jurnal ini menyetujui ketentuan berikut: Penulis memegang hak cipta dan memberikan hak publikasi pertama kepada jurnal dengan karya tersebut secara bersamaan dilisensikan di bawah Lisensi Atribusi Creative Commons yang memungkinkan orang lain untuk berbagi karya dengan pengakuan atas kepenulisan karya dan publikasi awal di jurnal ini. Penulis dapat mengadakan perjanjian kontrak tambahan yang terpisah untuk distribusi non-eksklusif dari versi terbitan jurnal (misalnya, mempostingnya ke repositori institusi atau menerbitkannya dalam buku), dengan pengakuan atas publikasi awalnya pada tahun jurnal ini. Penulis diizinkan dan didorong untuk memposting karya mereka secara online (misalnya, di repositori institusi atau di situs web mereka) sebelum dan selama proses penyerahan, karena hal ini dapat mengarah pada pertukaran yang produktif, serta kutipan karya yang diterbitkan lebih awal dan lebih banyak (Lihat Pengaruh Open Access)
RESPON PERTUMBUHAN TANAMAN JENGKOL DAN NANGKA TERHADAP PEMUPUKAN DI BLOK GARUNG TAMAN NASIONAL GUNUNG HALIMUN SALAK
One of the conservation partnership areas in Mount Halimun Salak National Park (MHSNP) is the Cikaniki Sejahtera Forest Farmers Group (KTH), which does not yet have any forestry crops. The Forest and Land Rehabilitation Program (RHL) is carried out through an agroforestry system with support from Japan International Forestry Promotion and Cooperation Center (JIFPRO). This study aims to analyze the effect of NPK fertilizer and ecoenzyme on the growth of jengkol and jackfruit plants. The study was conducted using a factorial completely randomized design (CRD), namely NPK fertilizer doses (0; 2.5; and 5 g), ecoenzyme fertilizer concentration (0; 10; and 20 ml/L), and a combination of NPK fertilizer and ecoenzyme. The results showed that the use of 10 ml/L ecoenzyme fertilizer had a very significant effect on the height and stem diameter of jengkol plants. In jackfruit plants, the use of 5 g NPK fertilizer and 10 ml/L ecoenzyme fertilizer individually had a very significant effect on height growth.
Copyright (c) 2025 Andi Sukendro, Yurico Bakhri https://creativecommons.org/licenses/by-sa/4.0
MONITORING TINGKAT KEKRITISAN LAHAN AKIBAT PERUBAHAN TUTUPAN LAHAN MENGGUNAKAN CITRA SENTINEL 2A DI KECAMATAN BANYAKAN, KABUPATEN KEDIRI
Banyakan Subdistrict, Kediri Regency, is experiencing pressure from the conversion of agricultural land into intensive infrastructure development, which potentially leads to land degradation. This study aims to analyze land cover and monitor land criticality levels in Banyakan Subdistrict for the years 2017 and 2024 using Sentinel-2A imagery. Land cover classification were analyzed using the maximum likelihood classification method. Land criticality was assessed by five parameters: land cover, slope gradient, erosion hazard level, land productivity, and land management. The results show that mixed gardens dominate the land cover classes. There was an increase of 82.20 hectares in open land, mainly due to airport construction. This land cover change has resulted in an increase in land criticality levels, indicated by an expansion of the critical class by 0.91 hectares and the potentially critical class by 6.97 hectares in protected areas. In agricultural cultivation areas, there was an increase in the non-critical class by 994.14 hectares. Meanwhile, the most significant decrease occurred in production areas within the potentially critical class, which declined by 326.91 hectares. Nevertheless, there was a relatively large increase of 306.61 hectares in the slightly critical class within production areas.
Copyright (c) 2025 Salma Salsabila, Nining Puspaningsih, Sri Rahaju, Qori Pebrial Ilham https://creativecommons.org/licenses/by-sa/4.0
PENGGUNAAN METODE TREE SAMPLING DALAM PENDUGAAN STRUKTUR TEGAKAN, BERAT BASAH DAN VOLUME TEGAKAN GAMAL (Gliricidia sepium)
This study aims to evaluate the application of the tree sampling method in estimating the stand structure and wet weight of gamal trees (Gliricidia sepium) as a source of biomass energy. Data collection was carried out in three age class plots (2019, 2020, and 2021) in the RPH Hanjuang Barat, BKPH Lengkong, KPH Sukabumi. Stand structure was obtained through census and tree sampling simulation with variations in the number of sample trees (9, 12, and 15) and sample points (5 and 7). The chi-square test results showed that the tree sampling method with 12 and 15 sample trees at 5 points and 9, 12, and 15 sample trees at 7 points was able to estimate the stand structure that was close to the actual conditions. Estimates of wet weight, and stand volume showed the highest values in the 2019 planting year with 15 sample trees and 7 points, amounting to 81.084 tons ha⁻¹, and 182.650 m³ ha⁻¹, respectively. These results indicate that stand age, number of sample trees, and sampling points affect estimation accuracy. The tree sampling method can potentially be an efficient alternative for biomass stand inventory.
Copyright (c) 2025 Muhdin Muhdin, Muhammad Roni Hakim, Sri Rahaju, Qori Pebrial Ilham, Teddy Rusolono https://creativecommons.org/licenses/by-sa/4.0
ANALISIS PERUBAHAN PENGGUNAAN LAHAN DAN PERBEDAAN PERHITUNGAN LIMPASAN MODEL SCS-CN: STUDI KASUS DI DAS CIMANCEURI
Land use is one of the factors that affects the rainfall-runoff transformation of the watershed. This study aims to analyze land use changes and the differences of the Soil Conservation Service–Curve Number model calculations to predict rainfall-runoff transformation in the Cimanceuri Watershed. Land use changes are analyzed using geoprocessing-intersect Land Use Maps of the Ministry of Environment and Forestry, 2018 and 2023. The rainfall-runoff transformation was analyzed using four different calculation methods of the Soil Conservation Service–Curve Number model, namely Q1, Q2, Q3, and Q4. The results showed that the area of Forests and Plantations decreased by 99.2% and 17.9%, respectively, while the area of Mixed Agricultural Land and Settlements increased by 16.4% and 19.1%, respectively. The average curve number increased from 73.0 to 73.7. Surface runoff decreased from 114.0 to 112.9 mm/month. The average monthly rainfall in 2018 and 2023 was 184 and 182 mm/month, respectively. The surface runoff/rainfall ratio is fixed at 62%. Four calculation methods result in different runoff estimates. The Q1 calculation method resulted in the best spatial results among the four methods. This study confirms that the reduction of the area of Forests and Plantations does not necessarily increase the runoff of a watershed, depending on the occurrence of rainfall.
Copyright (c) 2025 Nala Nur Isnaeni, Hendrayanto, Priyanto https://creativecommons.org/licenses/by-sa/4.0
PELUKAAN ULANG SADAPAN PINUS DENGAN METODE BOR DI HUTAN PENDIDIKAN GUNUNG WALAT
Re-tapping is carried out to utilize tapping holes that have healed, allowing the same spot to be used again without continuously creating new wounds on the tree. This study explains effect of re-tapping pine sap tapping holes using a drill method, comparing the productivity of sap between new tapping holes and recovered holes, and determining the optimal drill bit size. The treatments applied were the type of hole (new and recovered) and the use of four drill bit sizes (5/8, 6/8, 7/8, and 8/8 inches). Resin productivity data were analyzed using the Mann-Whitney U test and the Kruskal-Wallis test. The results showed that re-tapping on recovered holes could still produce resin, but the productivity was not as high as that of new holes. The larger the drill bit size, the more latex produced. The 8/8-inch drill bit size yielded the highest productivity, but the 6/8-inch size produced pine resin that was not significantly different from the 7/8-inch and 8/8-inch sizes. The use of a 6/8-inch drill bit is recommended as the optimal choice to support sustainable pine resin production with minimal damage, allowing the tapping wounds to heal more quickly.
Copyright (c) 2025 Gunawan Santosa, Muhammad Fadhil Sumakoen Karim https://creativecommons.org/licenses/by-sa/4.0
PENDUGAAN STOK KARBON TEGAKAN KARET AFDELING SETRO PTPN IX, KABUPATEN SEMARANG
This study aimed to estimate the carbon stock stored in rubber tree stands at Afdeling Setro, PTPN IX, Semarang Regency. The estimation was carried out using a stratified random sampling method based on stand age classes, with sample plots measuring 20 × 20 m. Tree diameter data were collected directly in the field and used to calculate biomass using an allometric equation specific to rubber trees. Biomass values were then converted into carbon stock using a standard carbon content percentage. The results showed that the average carbon stock increased with the age of the stand. Age class I (6–10 years) had a carbon stock of 26,087 tons/ha, while age class IV (21–25 years) reached 96,578 tons/ha. The total research area covered 569,62 ha with an estimated total carbon stock of 23,716.09 tons. The relationship between stand age and carbon stock showed a positive correlation, indicating that the age of rubber trees influences the amount of carbon stored in the stand.
Copyright (c) 2025 Elias, Muhammad Yusron Alwan https://creativecommons.org/licenses/by-sa/4.0
POTENSI BEBERAPA JENIS BAMBU DI INDONESIA UNTUK BAHAN ENERGI BIOMASSA
Biomass is a renewable alternative energy source with abundant potential. The weakness of biomass as an energy material is its very diverse nature and lower calorific value compared to fossil-based energy. Pyrolysis is one of the energy conversion methods with the aim of increasing energy density with various forms of energy. This study aims to analyze seven bamboo species as energy materials with proximate analysis, and the pyrolysis was applied to increase their calorific value. Pyrolysis was carried out at a temperature of 350 °C for one hour and the characterization of bamboo and charcoal products was carried out with proximate analysis. The results showed that bamboo has the potential for biomass energy materials with an average calorific value of the seven bamboo species studied of 3941 kcal/kg (3869–4327 kcal/kg) with an average level of fixed carbon, volatile matter, and ash of 24.39%, 73.24%, and 2.37%, respectively. Pyrolysis increased the average calorific value by 70.34% from an average of 3941 kcal/kg of bamboo to an average of 6713 kcal/kg of their char. The increase in the calorific value of the char was mainly related to an increase in the average bound carbon content by 50.27% and a decrease in the average volatile matter content by 70.34%. Based on calorific value and ash conten; betung, gombong, and mayan bamboos meet the requirements as biomass energy materials according to SNI 8951:2020.
Copyright (c) 2025 Deded Sarip Nawawi, Priyanto, Adesna Fatrawana https://creativecommons.org/licenses/by-sa/4.0
KEANEKARAGAMAN JENIS BURUNG BERDASARKAN GRADIEN TIPE HABITAT DI AREAL TAMBANG EMAS PT NATARANG, KABUPATEN TANGGAMUS, PROVINSI LAMPUNG
Birds are key components of the environment with an important role in maintaining environmental stability. In forested landscapes, the forest environment and the gradient of habitat types influence the richness and diversity of bird species, and bird diversity can be used as a practical measure of environmental stability. An inventory of bird richness and diversity was conducted using a transect approach combined with the Index Point of Abundance (IPA) method to count birds associated with different habitat-type gradients. Six transects, each 200–300 m long, were established in the PT Natarang gold mining area across four habitat types: hilly lowland forest, hilly lowland secondary forest, coffee plantation, and an open area dominated by grasses and shrubs. Along each transect, observation points were set at 50 m intervals. At every point, all birds seen and heard were recorded, noting both the number of individuals and the species, within a 20-minute observation period. A total of 50 bird species were recorded in the PT Natarang concession area. The bird species diversity index ranged from 1.81 to 2.81, with the highest value in the lowland hilly forest habitat gradient and the lowest value in the open habitat gradient. Bird community structure in the concession was dominated by insect-eating birds (48.00%), followed by fruit-eating birds (22.00%). Ten protected species were found in the concession area: Crested Serpent Eagle, Changeable Hawk-Eagle, Black-thighed Falconet, Black Hornbill, Rhinoceros Hornbill, Pied Fantail, Olive-backed Sunbird, Brown-throated Sunbird, Crimson Sunbird, and Little Spiderhunter. These protected species were present along the gradient.
Copyright (c) 2025 Jarwadi Budi Hernowo https://creativecommons.org/licenses/by-sa/4.0
KERUSAKAN DAN PEMULIHAN POHON PINUS (PINUS MERKUSII) AKIBAT PENYADAPAN PADA BERBAGAI KETINGGIAN TEMPAT DI KPH KEDIRI
The level of damage to pine trees due to tapping is based on the parameters of the number of taps, width of taps, height of taps and depth of taps. The altitude at which pine trees grow can affect the recovery of pine tapping fields because weather conditions, air temperature and sunlight intensity at each altitude are different. This study aims to determine the condition of pine trees due to tapping, measure the percentage of pine tree tapping field recovery and analyze the effect of altitude on tapping field recovery. The results showed that the average tapping damage at each altitude did not meet the pine resin tapping procedures that had been implemented by Perhutani except for the average tapping height. The height of the place affects the recovery of the tapping field. The highest average percentage of tapping field recovery was found at an altitude of <400 meters above sea level (masl) with a value of 50.40%/tapping and the lowest average percentage of tapping field recovery was found at an altitude of >1,000 masl with a value of 36.05%/tapping.
Altitude, Recovery of tapped areas, Tap damage, Tapping
Copyright (c) 2025 Rafly Rifansyah Setiawan, Gunawan Santosa, Priyanto
ANALISIS PENGHIDUPAN ORANG RIMBA DI KECAMATAN AIR HITAM PASCA PERUBAHAN ZONASI TAMAN NASIONAL BUKIT DUABELAS
In 2019, Bukit Duabelas National Park integrates its zoning system with the Orang Rimba traditional land utilization in attempt to fulfill its mandate to protect Orang Rimba’s livelihood. This research aims to determine wheter the zoning system of Bukit Duabelas National Park has truly accomodated sustainable livelihoods for Orang Rimba by exploring the livelihood resources and livelihood strategies of the Orang Rimba in Air Hitam using mixed methods and the Sustainabe Rural Livelihood framework. The research reveal different capital possession accross nomadic, semi-sedentary, and sedentary groups. Sedentary group possess highest capital across all types, except social. Livelihood strategies have shifted to cultivation (especially oil palm and rubber) with hunting-gathering primarily done by nomadic and semi-sedentary group. Non-agricultural diversification practiced only by semi-sedentary and sedentary group. This change is driven by the need for stable income, declining forest resources, and increased competition. Orang Rimba hold access, withdrawal, and management rights to Bukit Duabelas National Park. Orang Rimba's access mechanism is legal access via social identity, while individual benefits depend more on capital access. To enhance the adaptability of the Orang Rimba, implementing intercropping or optimized weeding is recommended for hunting-gathering communities, while crop diversification or integrated crop-livestock farming is suggested for groups engaged in oil palm cultivation. Furthermore, improving access to education and training is crucial to boost human capital, which is vital for opening up non-agricultural diversification opportunities.
Copyright (c) 2025 Lusiana Debora Sihite, Sambas Basuni
KONTRIBUSI TANAMAN ENERGI HUTAN RAKYAT TERHADAP PENDAPATAN RUMAH TANGGA PETANI HUTAN DI SEKITAR PLTU ADIPALA KABUPATEN CILACAP
This study aims to analyze the management of energy crops in community forests and their contribution to household income among forest farmers around PLTU Adipala, Cilacap Regency. Using a proportional stratified random sampling method, the study involved 60 respondents from three sub-districts. The results indicate that farmers and their families actively conduct community forest management, starting from land preparation to maintenance using simple tools. Agroforestry systems are applied with alley cropping and enrichment planting patterns, combining timber species (silk tree, teak, mahogany) with non-timber forest products (coconut, Ceylon-olive, clove) and food crops. Marketing is commonly carried out directly from the farmers' land or homes to reduce costs. Income from energy crops contributes 1% to total household income, but with optimized utilization of energy crops and their by-products, such as gamal leaves, this contribution is projected to increase to 25%.hutan rakyat, pendapatan rumah tangga, tanaman energi
hutan rakyat, pendapatan rumah tangga, tanaman energi
Copyright (c) 2025 Brilian Adhie Pahlevi, Soni Trison, Tsanie Ditya Kurnia, Iin Ichwandi
METODE RANDOM FOREST DAN SUPPORT VECTOR MACHINE UNTUK MONITORING PERUBAHAN TUTUPAN LAHAN DI KECAMATAN KLAPANUNGGAL, KABUPATEN BOGOR
Land cover change is an ongoing phenomenon, making regular monitoring essential. One effective approach to land cover classification is supervised machine learning. This study utilizes Sentinel-2 imagery from 2018 and 2024 to monitor changes in land cover. Classification was conducted using two algorithms—Random Forest (RF) and Support Vector Machine (SVM)—in accordance with the Indonesian National Standard (SNI) 7645:2014 for land cover classification. The results indicate that RF achieved a higher accuracy of 92.73%, compared to 90.91% for SVM. Consequently, RF was selected for further analysis of land cover changes. Negative changes totaled 272.42 ha (2.86%), primarily involving the conversion of rice fields into settlements (114.42 ha or 1.2%). Positive changes amounted to 85.6 ha (0.9%), with the most common being the conversion of shrubs into dryland agriculture (43.5 ha or 0.46%).
Copyright (c) 2025 Suwanda, Nining Puspaningsih, Sri Rahaju
PERKEMBANGAN PENELITIAN HUTAN RAKYAT DI INDONESIA: TINJAUAN BIBLIOGRAFI
Private forests in Indonesia have an essential role in ensuring communities’ survival. The science of private forest management is necessary for achieving sustainable forest management. However, the science of private forest management is still relatively young compared to the forest management sciences intended to manage large and massive forests. Therefore, it is important to know to what extent the development of the science of private forest management has been through various studies over the years. The objective of this research is to map the development of research in the private forests from year to year, covering the location of research, publications, themes, and sub-themes starting from 2013-2023 as well as to find out the correlation between the theory and practice of private forest management. The research was conducted using bibliographic surveys and analyzed qualitatively descriptively, as well as an annotated bibliography. The research results show that a lot of private forest research is done in West Java Province, with the themes of production and planting sub-themes. Some practices in the field do not apply theory, so private forest management has yet to reach optimum.
Copyright (c) 2025 Nadya Amelia Salsabila, Hardjanto
ANALISIS KEBIJAKAN REHABILITASI LAHAN MELALUI PEMBANGUNAN HUTAN RAKYAT PADA CABANG DINAS KEHUTANAN WILAYAH I BOGOR
The increasing rate of land degradation in West Java has led to the expansion of critical land areas, which in turn threatens environmental sustainability. One of the strategic efforts to address this issue is through Forest and Land Rehabilitation (FLR) programs, particularly by promoting community-based forest development or "Hutan Rakyat" outside designated forest areas. This study aims to analyze the policy strategies for rehabilitating critical land outside forest areas through community forest development in the jurisdiction of the Forestry Branch Office Region I of West Java Province. The research employs SWOT analysis to identify internal strengths and weaknesses, as well as external opportunities and threats influencing the effectiveness of the policy. Findings reveal various supporting factors, such as government funding, the presence of forest farmer groups, and available guidelines, alongside constraints including unclear land tenure status, limited technological adoption, and insufficient data accuracy. The analysis suggests a combination of strategic approaches, including collaboration with Jakarta's government, engagement of youth, partnerships with academics, and the establishment of legal frameworks to ensure sustainability. These strategies are expected to enhance the effectiveness and efficiency of critical land rehabilitation efforts and contribute to environmental conservation and rural development.
Copyright (c) 2025 Gita Pujasari, Dian Fajarwati, Cecep Abd. Qoyum, Yuliandri Hanafi, Hadi Firmansyah, Rico Prihatono
NILAI EKONOMI BUAH PADA HUTAN DI AREAL PENGGUNAAN LAIN DESA SUNGAI BULUH, KABUPATEN SINTANG, PROVINSI KALIMANTAN BARAT
Sungai Buluh Village has 26% forest cover in its Other Land Use Area (APL) which is threatened by land conversion. This threat requires efforts to protect the remaining forest cover by utilizing alternative forest resources in the area. One alternative utilization that can be developed is fruit as a Non-Timber Forest Product (NTFP). For this reason, it is necessary to conduct an analysis of the physical potential and economic value of fruit through field observations, forest inventory, interviews, Focus Group Discussions (FGD) and calculation of economic value. The results show that there are 15 species of fruit, but only 4 species have commercial value, namely durian (Durio sp.), jengkol (Pithecellobium jiringa), keranji (Dialium indum), and longan (Dimocarpus longan L.). Keranji has the highest production potential with 280,746 kg/year, followed by durian with 256,220 fruits/year, jengkol with 58,610 kg/year, and longan with 2,812 kg/year. Durian and jengkol have high resource rent values of Rp 3.751.280/ha/year and Rp 3.351.280/ha/year, respectively. The highest utilization rates are for durian (29%) and jengkol (46%). Sustainable forest resource management and the economic utilization of NTFPs are necessary strategies to enhance community welfare and protect the environment in Sungai Buluh village.
Other Land Use Area, Resource Rent, Economic Value, Durian (Durio sp.), Jengkol (Pithecellobium jiringa), Keranji (Dialium indum), Longan (Dimocarpus longan L.)
Copyright (c) 2025 Bramasto Nugroho, Ilya Fauziah, Fitta Setiajiati, Bahruni
EVALUASI KESESUAIAN LAHAN AGROFORESTRI BERBASIS TANAMAN HORTIKULTURA DI DESA KARYASARI, KECAMATAN LEUWILIANG, KABUPATEN BOGOR
Karyasari Village exhibits low agroforestry productivity, particulary in horticultural crops. A land suitability evaluation is required as a strategy for agricultural development, integrating field data with land suitability classification for horticultural crops. This evaluation employs both matching and scoring methods, yielding four suitability classes (S1, S2, S3, and N). The study’s findings indicate that tree horticultural crops preferred by farmers are avocado, coffee, and cassava. The weighted scores for these crops range between 60-80, with low soil organic-carbon content and steep land slopes identified as limiting factors. This places all community forest land in Karyasari Village whitin the S2 category (moderately suitable).
Copyright (c) 2025 Elias, Kevin Giovani Manurung
PARTISIPASI PETANI DALAM PENGELOLAAN HUTAN RAKYAT DI KECAMATAN KARE, KABUPATEN MADIUN
Farmer participation in private forest management plays an important role in maintaining the existence of the forest and improving community welfare and forest sustainability. This study aims to analyze farmers' participation in private forest management and its influencing factors in Kare Sub-district, Madiun District. Data were collected using in-depth interviews and ordinal scale questionnaires with Rank Spearman correlation analysis on 90 farmers by purposive sampling. Internal factors measured were age, number of family dependents, land size, farming experience, and farming motivation. External factors consisted of forestry extension, forest farmer groups, and information sources. The results showed that farmers' participation in private forest management in Kare Sub-district at the planning stage was moderate, the implementation stage was moderate, the utilization stage was moderate, and the evaluation stage was low. Participation is significantly influenced by internal and external factors.
private forest management, external, internal, participation
Copyright (c) 2025 Miatu Ainur Rohmawati, Hardjanto
PERUBAHAN PENGGUNAAN LAHAN DI DAERAH TANGKAPAN AIR DANAU LIDO DAN PENGURANGAN LUAS PERMUKAAN BADAN AIR DANAU LIDO
The shrinking area of Lake Lido is a critical issue for the management of the Lake Lido Water Catchment Area. Identifying the causing factors is crucial concerning the Lido Lake Water Catchment Area. The objectives of this study are to analyze land-use changes in the Lake Lido Water Catchment Area, changes in the water surface area of Lake Lido, and the causes of the land-use changes and the lake's shrinkage. The available satellite imagery and maps were analyzed using ArcGIS, GEE-Climate Engine, and Excel software. The results indicate that the land use changes in the Lake Lido Water Catchment Area vary, with 21 different types of changes spatially occurring between 2017 and 2024. The total area of built-up land increased, as well as tree-vegetated land, but the agricultural land decreased. The surface area of Lido Lake's water body decreased from 14.5 ha in 2003 to 11.9 ha in 2024. The lake's surface area shrank the most between 2017 and 2024. The reduction of Lake Lido’s water surface area is primarily due to sedimentation in the lake.
Copyright (c) 2025 Hendrayanto, Priyanto, Sri Rahaju, Qori Pebrial Ilham
FAKTOR KONVERSI VOLUME TERHADAP BERAT GAMAL (Gliricidia sepium) BERDASARKAN UMUR TEGAKAN DI SUKABUMI, JAWA BARAT
The conversion factor from stacked wood volume to weight is a widely used method for estimating the biomass of energy plantation forests. However, the general conversion factor for gamal (Gliricidia sepium) established by the Indonesian government does not account for variations in stand age. This study aims to determine age-specific conversion factors for gamal and evaluate the differences in these factors across various stand ages. Field data collection was carried out in a gamal plantation comprising three stand ages—3, 4, and 5 years—located in the Sukabumi Forest Management Unit, West Java. In each stand age, ten gamal trees were felled and grouped based on the similarity in the number of branches to obtain stacked wood samples. A total of 12 stacked wood samples from 30 felled trees were collected across the three stand ages, with their stacked volumes and fresh weights measured to determine conversion factors. The differences in these conversion factors were assessed using the Kruskal-Wallis test. The results indicated conversion factors of 0.286, 0.369, and 0.444 for gamal trees aged 3, 4, and 5 years, respectively. This study confirms that gamal conversion factors differ significantly among stand ages, suggesting the use of age-specific conversion factors would provide accurate estimates of the fresh weight of gamal plantations. Keywords: conversion factor, stand age, gamal, stacked-wood, staple meter
conversion factor, stand age, gamal, stacked-wood, staple meter
Copyright (c) 2025 Muhdin, Arhan Trirahido, Tatang Tiryana, Muhammad Buce Saleh
KEBISINGAN DALAM PENYARADAN DENGAN SEPEDA MOTOR (OJEK KAYU)
Modified motorcycles are known as mode for log transportation in remote area. However, these modifications can generate noise. Therefore, it is necessary to understand the noise produced by log transport motorcycles along with its impact on the work environment and workers' health during skidding activities. The purpose of this research is to determine the level of noise exposure and its impact on the surrounding environment and workers' health during log transportation activities. The research was conducted using purposive sampling method with the help of a sound level meter and data analysis in the form of contour maps and Wilcoxon non-parametric tests. The results showed that the average noise intensity received by wooden crossbar taxi drivers during skidding activities ranges from 73.4 dB to 101.5 dB, and the average noise intensity in the surrounding environment ranges from 50.6 dB to 101.0 dB. There are noise intensities exceeding the Threshold Limit Value (TLV) at full throttle conditions for both right and left ears. This condition poses a health risk to workers as noise significantly affects workers' concentration ability, which can be interpreted as: the greater the noise received by workers, the more their concentration ability may decrease.
Copyright (c) 2025 Efi Yuliati Yovi, Deofa Erham Mustofa
STUDI LITERATUR METODE REHABILITASI LAHAN HUTAN DI INDONESIA
Rehabilitation of damaged forests is no longer a new discourse in the forestry sector. Forest and land rehabilitation is intended to restore, maintain and improve the function of forests and land so that their carrying capacity, productivity and role in life supporting systems are maintained. Indonesia is one of the countries that has the largest tropical forest in the world. Therefore, it is very important to maintain biodiversity and contribute to reducing the impacts of climate change. However, with the large area of ​​tropical forests, Indonesia still faces challenges and problems in managing forests and land. This literature study provide insight into effective rehabilitation methods in overcoming this problem. Agroforestry, which integrates productive plants with forest trees, has been proven to be able to improve ecosystem conditions, restore forest function, and improve the welfare of local communities. The study concludes that agroforestry offers a holistic solution that combines environmental, social welfare and economic benefits. Further research and ongoing monitoring are also needed to ensure the long-term success of this method.
agroforestry, Indonesia, metode, rehabilitasi lahan hutan
Copyright (c) 2025 adelia dewandri rahmawati, Elias
KARAKTERISTIK KULIT GEMOR SEBAGAI DASAR UNTUK PEMANFAATANNYA
Chemical properties are a basis for the utilization of biomass based on its components. The chemical properties of wood biomass can differ between species, growth site, age, and parts of the tree. Bark is still considered a by-product of wood utilization, although based on its chemical components, it has the potential for various natural chemical products. Gemor bark has been utilized by forest communities, such as for mosquito repellent. The development of bioproducts based on chemical components is expected to increase the value of gemor bark. For that, it is necessary to understand the chemical components and properties of gemor bark. This study aims to examine the content of chemical components, proximate analysis, and phytochemistry of gemor bark. Gemor bark samples were collected from Central Kalimantan. Determination of chemical component content refers to TAPPI standards (1996), proximate analysis refers to ASTM standards (2013), and phytochemical analysis refers to the Harbone method (1996). The main chemical components of gemor bark consist of holocellulose 63.59%, α-cellulose 46.19%, hemicellulose 17.39%, and lignin 43.56%. The extractive substances dissolved in hot water, cold water, 1% NaOH, and ethanol/benzene are 19.49%, 18.21%, 47.65%, and 27.66%, respectively. Proximate analysis of gemor bark obtained volatile matter content of 78.04%, ash content of 1.32%, and fixed carbon of 20.64%. Qualitative phytochemical analysis detected the presence of flavonoids, phenolics, alkaloids, tannins, saponins, and steroids in gemor bark. Based on its chemical components, gemor bark has the potential as an energy and a source of phenolic chemicals with various chemical properties
biomass, chemical components, gemor, wood bark
Copyright (c) 2025 Deded Sarip Nawawi, Ageng Pratama
MODEL PENDUGA BIOMASSA UNTUK TEGAKAN REHABILITASI DI HUTAN PENDIDIKAN GUNUNG WALAT
Forest rehabilitation plays an important role in increasing forest biomass and carbon stocks. However, there are limited studies that provide information on biomass growth of rehabilitates areas. This study aimed at developing stand biomass growth models for rehabilitated areas in Gunung Walat University Forest. The biomass data of Pinus merkusii stands were obtained by establishing and measuring 115 sample plots in various stand ages by applying the stratified systematic sampling method. The stand biomass growth models were developed by using regression analysis with independent variables consisting of age, diameter, height, basal area, and stand density. The results showed that the stand biomass of Pinus merkusii could be best estimated by stand age (A, year) and basal area (G, m2/ha) using the equation of W = 1,77A0,21G1,12 (R2adj = 99,27% and RMSE = 2,05 ton/ha). When the stand basal area data would not be available, the stand biomass could also be estimated using the equation of W = 0,06A-0,52D2,68 or W = 0,00057A2,37N1,25, which use the stand diameter (D, cm) and stand density (N, trees/ha) in addition to the stand age. These models are useful for the forest manager in estimating and monitoring the stand biomass growth of rehabiltated stands in Gunung Walat University Forest
biomass, growth model, Pinus merkusii, forest rehabilitation
Copyright (c) 2024 Andani Jamilah Mardhotillah, Tatang Tiryana, Teddy Rusolono, Muhdin
PENYUSUNAN DAN VALIDASI MODEL ALOMETRIK BIOMASSA POHON EUKALIPTUS HIBRIDA DI UNIT PENGELOLAAN HUTAN TANAMAN DI SUMATRA UTARA
Information on tree biomass potential is closely related to the ability of vegetation to absorb CO2, which is one of the pollutants that can cause the greenhouse effect. Eucalyptus is one of the tree species cultivated in industrial plantation forests in Indonesia, with a relatively short rotation period (3–5 years), and can act as a carbon dioxide absorber. This study aims to develop an allometric model to estimate the total biomass of hybrid eucalyptus trees in a plantation forest management unit in North Sumatra. The sample trees used in this study included 75 trees with diameters ranging from 1.46 to 17.52 cm. The allometric models were developed using CurveExpert Basic 2.2.3 and RStudio 4.4.0, resulting in five selected models: power (M1), exponential (M2), polynomial (M3), rational (M4), and Hoerl (M5). Subsequently, these five models were validated, also involving two others previously existing allometric models at the same site, ultimately resulting in model M1 (W = 0.08378D^2.49572) as the best model. This model, based on this study, demonstrated better accuracy compared to other allometric models for estimating the biomass of hybrid eucalyptus trees at the study site.
allometric model, biomass, eucalyptus hybrid, model development, model validation
Copyright (c) 2024 Rose Ananda Mutiara Kansil, Muhdin, Ronald Hot Marnaek
EROSI TANAH PADA AREAL TANAM RUMPANG DAN HUTAN ALAM TERDEGRADASI DI PT. SARMIENTO PARAKANTJA TIMBER
Gap Planting and Gap Cutting (TRTR) is a silvicultural system that utilizes the phenomenon of natural forest succession by planting fast-growing species in gap areas. TRTR is expected to increase productivity in degraded natural forests. This study aims to determine the rate of soil erosion in the gap planting research area and degraded natural forest at PT. Sarmiento Parakantja Timber. The research was conducted on two slope classes: flat-gentle and moderate. The methods used in the study consist of the erosion stick method, ANOVA, and independent statistical tests. The study results show that the highest soil erosion occurs in degraded natural forest areas, followed by the erosion in barrier areas and in the planting strips. The statistical test results show that soil erosion in degraded natural forest areas, erosion in barrier areas, and in planting strips is significantly different. Similarly, the effect of flat-gentle slopes and moderate slopes on the extent of erosion in gap areas is also significantly different. However, the amount of erosion occurring in degraded natural forest areas and gap areas is not significantly different.
Soil erosion, degraded natural forest, slope, gap planting
Copyright (c) 2024 Elias Elias, Olga Amelia Elfadilla Sy
PENDUGAAN PEUBAH POHON DAN PEUBAH TEGAKAN JATI MENGGUNAKAN CITRA UNMANNED AERIAL VEHICEL (UAV) DI KPH RANDUBLATUNG
Forest inventory using remote sensing is an alternative to taking data in the field precisely and quickly. This study aims to identify the ability of UAV imagery to estimate the variables of teak stands of age class XIV with a flight altitude of 90 meters in KPH Randublatung. The method of data collection in the field is to make a plot in the form of a square with a size of 80 m x 80 m by purposive sampling based on slope level criteria. The aerial photography data was processed using PIX4Dmapper and ArcMap 10.5 software to produce the Canopy Height Model (CHM) and crown delineation. Tree variables, such as tree height can be estimated by visual height from CHM with R2 0,777, tree diameter and crown diameter can be estimated by visual crown diameter with R2 respectively 0,460; 0,475. Stand variables, such as stand height, can be estimated by visual average estimated height from CHM with R2 0,826. Stand diameter, crown diameter, stand base area, and number of trees can be estimated by visual average crown diameter with R2 respectively 0,486; 0,464; 0,478; 0,342. Therefore, UAV Imagery can estimate tree variables and stand variables of XIV age class teak in KPH Randublatung.
drone, UAV, tree variables, stand variables, teak
Copyright (c) 2024 Qori Pebrial Ilham, Sopha Erna Ariyan, Muhammad Buce Saleh, Sri Rahaju, Nining Puspaningsih, Priyanto
PENGGUNAAN STIMULANSIA DALAM PENYADAPAN PINUS KELAS UMUR V DAN VI DI PANINGGARAN, PEKALONGAN TIMUR
The Forest Management Unit (BKPH) Paninggaran, East Pekalongan falls under the pine enterprise-class, where pine resin is the main commodity. Consequently, the productivity of pine resin is highly regarded. The process of resin extraction during tapping is generally aided by stimulants. In practice, BKPH Paninggaran uses both organic and inorganic stimulants. Despite using different stimulants, BKPH Paninggaran has yet to determine which stimulant is the most effective and efficient. This study analyzes the productivity and added value of pine resin tapping when applied stimulants. The research method used a completely randomized design with a two-factor factorial. The first factor is the use of five types of stimulants. The second factor is age class V and VI. The stimulant that resulted in the highest resin productivity was the stimulant with active ingredients of ethylene and citric acid plus 5% sulfuric acid, with an average productivity of 12.98 g/quarre/day, representing a 76.44% increase in resin yield compared to the control (7.36 g/quarre/day). The productivity of pine resin in age classes V and VI did not differ significantly, being 10.13 g/quarre/day and 9.97 g/quarre/day, respectively. There was no interaction between the stimulant factor and the age class. The highest added value of the stimulant was found in the stimulant with active ingredients of ethylene and citric acid plus 5% sulfuric acid, amounting to Rp 52.76/quarre/day.
age class, pine resin, productivity, stimulant, tapping
Copyright (c) 2024 Ryan Darmawan, Juang Rata Matangaran, Gunawan Santosa
PRODUKTIVITAS DAN BIAYA PEMANENAN KAYU MANGIUM (Acacia mangium) DI BKPH PARUNG PANJANG KPH BOGOR
The rising demand for wood has outpaced the production capabilities of Perhutani. This study analyzes the productivity and costs associated with forest harvesting. Productivity was measured by calculating the volume of wood and the work time for each stage of the harvesting process: felling (31 cycles), skidding (49 cycles), and transporting (11 cycles). We compared the costs incurred by workers with those incurred by Perhutani. Our findings reveal effective productivity rates of 26.32 m³/day for felling, 21.40 m³/day for skidding, and 19.8 m³/day for transporting. However, the actual productivity for these stages is only 5.54 m³/day. Harvesting in BKPH Parung Panjang operates under a contract system, where low productivity increases total worker costs. The costs incurred per cubic meter by fellers, skidders, and transporters are Rp32,030.55, Rp4,338.04, and Rp67,628.72, respectively. In comparison, the wages they receive are Rp35,000/m³, Rp16,666.67/m³, and Rp70,000/m³. The narrow margin between wages and expenses raises concerns about the welfare of these workers.
Cost Analysis, Harvesting Mangium wood, Productivity, Wholesale System
Copyright (c) 2024 Sarwinda Agustin, Juang Rata Matangaran
FAKTOR-FAKTOR YANG MEMPENGARUHI PRODUKTIVITAS PENYADAP GETAH PINUS DI KPH SUKABUMI, PROVINSI JAWA BARAT
The increase in pine resin production depends on the productivity of tappers. The factors that affect the productivity of tappers include age, number of family members, working hours, wage incentives, and the load of trees that must be tapped. This study aims to analyze the factors that affect the productivity of pine resin tappers in KPH Sukabumi. The research was conducted using quantitative analysis methods with interviews using questionnaire. Sampling was determined using the purposive sampling with number of samples was 60 samples. Data analysis using multiple linear regression methods. The results showed that the number of family dependents, working hours, and the wage incentives had a significant effect on the productivity of tappers with an R Square value of 98.49%. Meanwhile, the age and load of trees that must be tapped had no significant effect on the productivity of tappers. The age factor is inversely proportional to productivity, meaning that the higher the age, the lower the productivity level. While other factors analyzed are directly proportional to the level of productivity.
Copyright (c) 2024 Ardya Hwardaya Gustawan, Bramasto Nugroho
STRATEGI BAURAN PEMASARAN PRODUK HASIL AGROFORESTRI PETANI KTH SATRIA MANDIRI CIANJUR, JAWA BARAT
Social Forestry by KTH Satria Mandiri applies an agroforestry pattern, consisting of rasamala, puspa, and non-timber forest products such as coffee, sugar palm, avocado, and cardamom. Like most agroforestry farmers in Indonesia, agroforestry in KTH is not optimal, due to a lack of market access, expertise, and capital. To create good marketing, KTH needs a marketing strategy that can be implemented with the marketing mix concept. This research aims to identify the relationship of the marketing mix to the sales as well as formulate marketing strategies to improve marketing performance. The data was collected through a census of all farmers, using interview and observation. Research data analysis utilizes qualitative descriptive, and SWOT matrix for marketing strategy. The research results show the four marketing mixes applied in the sales process of agroforestry products by farmers at KTH Satria Mandiri. The type of product meets market demand; the selling price is reasonable; it's not necessary for special product distribution and promotion by each farmer. The marketing strategy recommended in the short term is the S-O strategy, and in the long term is the W-O strategy. Increasing production, competitive prices, effective promotions, and a wide marketing network, including the marketplace, can potentially increase product sales.
Copyright (c) 2024 Bahruni, Lichintya Maharani Haino