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Junaedi, Ajun
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Agriculture, Biological Sciences & Forestry

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PERAN TEGAKAN SENGON DI HUTAN TANAMAN INDUSTRI DALAM MITIGASI PERUBAHAN IKLIM GLOBAL (The Role of Sengon’s Stand at Forest Plantation in Global Climate Change Mitigation) Junaedi, Ajun; Rizal, Moh
Jurnal Hutan Tropika Volume 14 Nomor 2 Tahun 2019
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v14i2.1149

Abstract

This research aims to estimate the biomass, carbon storage, carbon dioxide uptake and oxygen produced by sengon (Paraserianthes falcataria (L.) Nielsen) stand aged 9, 11 and 13 years in IUPHHK-HTI PT Parwata Rimba, Central Kalimantan. Estimated of biomass, carbon stock, CO2 uptake and Oxygen produced using allometric equations. The results showed that the storage of sengon standing biomass aged 9,11 and 13 years ranged from 110.71 to 200.94 tons/ha, carbon stock ranged from 52.03 to 94.44 tons C/ha, CO2 uptake ranged from 190.79 to 259.13 tons CO2/ha and Oxygen produced around 138.75 to 251.84 tons O2/ha. The total of biomass, carbon stock, CO2 uptake and Oxygenproduced by sengon stands at forest plantations are large enough to have an important role in global climate change mitigation in the forestry sector.
Karakteristik Sarang dan Kepadatan Populasi Orangutan (Pongo pygmaeus wurmbii) Di Zona Khusus Laboratorium Alam Hutan Gambut Taman Nasional Sebangau Kalimantan Tengah: Orangutan (Pongo pygmaeus wurmbii) Nest Characteristics and Population Density in The Special Zone of The Peat Natural Forest Laboratory of Sebangau National Park Central Kalimantan Rizal, Moh; Sinaga, Fani Delima Sari; Octavianus, Robby; Junaedi, Ajun; Luhan, Gimson
HUTAN TROPIKA Vol 18 No 2 (2023): Volume 18 Nomor 2 Tahun 2023
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v18i2.11955

Abstract

This study aimed to identify nest density and orangutan (Pongo pygmaeus wurmbii) population as well as nest characteristics (nest tree type, nest tree height, nest tree diameter, nest age class, nest location) in the special zone of the Peat Forest Nature Laboratory (LAHG) of Sebangau National Park, Central Kalimantan. The research used the strip transect method with the length of each line ± 1000 m and a width of 20 m on each right and left side of the line as many as 5 transect lines. The objects of observation were orangutans, orangutan nests, and nest trees along the transect lines. The results showed that the average density of orangutan nests in the LAHG special zone of Sebangau National Park in Central Kalimantan was 375.17 nests/km2 with an estimated orangutan population density of 0.987 individuals/km2. Characteristics of orangutan nests found in the research location include: the most common tree species used as a place to make orangutan nests is Tarantang (Campnosperma coriaceum (Jack) Hallier f.) from the Anacardiaceae family. The height and diameter of the most dominant trees used as orangutan nests ranged from 11-15 m and 11-20 cm, respectively. The height of orangutan nests from the ground ranged from 11-15 m, the class of nests included class B, and the position of nests included category 4.
Keanekaragaman Jenis Mamalia Besar di Kawasan UPT. Laboratorium Alam Hutan Gambut (LAHG) Sebangau Kalimantan Tengah: Diversity of Large Mammal Species in the UPT Peat Swamp Forest Nature Laboratory (LAHG) Sebangau, Central Kalimantan Madiyawati, Milad; Rizal, Moh.; Nababan, Gabriella SN; Junaedi, Ajun; Mujaffar, Ahmad; Toni, Hendra
HUTAN TROPIKA Vol 18 No 2 (2023): Volume 18 Nomor 2 Tahun 2023
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v18i2.11970

Abstract

Kalimantan has 222 species of mammals and 44 of them are endemic. This study aims to calculate the diversity and determine the number of large mammal species that exist in the UPT area. Natural Laboratory of Peat Forest (LAHG) Sebangau University of Palangka Raya, Central Kalimantan. The results of the research are There are 5 types of large mammals found through observation and interviews, namely Gibbon (Hylobates albibarbis), Classi (Presbytis baricunda), Orangutan (Pongo pygmaeus), Wild boar (Sus barbatus) and Sun Bear (Helarctos malayanus). Diversity Index of large mammal species in the UPT Area. Large mammal species diversity index in the UPT area. The Sebangau Peat Forest Nature Laboratory (LAHG) showed that it was classified as low, namely 0.97, the species richness index of large mammals in the UPT area. The Sebangau Peat Forest Nature Laboratory (LAHG) is classified as low, namely 0.96. The low number of individuals found in swamp and lowland habitats is related to the insufficient availability of feed in these habitats. This is caused by environmental conditions, namely peat swamps which are always wet and stagnant. And the index of evenness of large mammal species in the UPT area. The Sebangau Peat Forest Nature Laboratory (LAHG) is classified as high, namely 0.88. This has caused the discovery of mammals in the LAHG area to appear evenly distributed because there is no dominance between each species in the community.
Keanekaragaman Jenis Tumbuhan dan Status Konservasi Tumbuhan di Kebun Raya Katingan : Plant Species Diversity and Conservation Status in Katingan Botanical Garden Setiarno, Setiarno; Sari , Nurmila; Sosilawaty, Sosilawaty; Hidayat, Nisfiatul; Junaedi, Ajun
HUTAN TROPIKA Vol 18 No 2 (2023): Volume 18 Nomor 2 Tahun 2023
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v18i2.12013

Abstract

The existence of the Katingan Botanical Garden which will collect various plants (fruits, orchids, and various types of forest vegetation typical of Kalimantan) will be utilized and developed for research, education, cultivation, conservation, tourism, and environmental services. This study aims to analyze the diversity and reveal the rarity status of plant species in the Katingan Botanical Garden area, Katingan Regency, Central Kalimantan Province. The method used to collect vegetation data is the plot method in the form of quadratic transects. The size of the observation plot transect is 20 m x 500 m with 2 (two) transects. The research object is seedling, sapling, pole, and tree-stage vegetation. The composition of vegetation species found in the community unit (2,0 ha) is 28 species belonging to 17 tribes, in this, there are 2 individuals that have not been identified. Akasia (Acacia mangium), Tumih (Cambretocarpus rotundatus), and Gerunggang (Cratoxylum arborescent BI.) dominated at all growth stages. The biodiversity indices (diversity, richness, and evenness indices) are classified as medium, low, and high, respectively. There are 3 (three) plant species classified as IUCN status, namely Pulai (Alstonia scholaris) with Least Concern (LC) or low-risk criteria, Jelutung (Dyera lowii) with Vulnerable (VU) or vulnerable criteria, Kempas (Koompassia malaccensis) with Vulnerable (VU) or vulnerable criteria, and 1 (one) plant species including protected, namely Kempas (Koompassia malaccensis).
Komposisi Jenis, Serapan Karbon Dioksida dan Produksi Oksigen Vegetasi Berkayu di Hutan Kemasyarakatan Batu Bulan Kabupaten Gunung Mas Kalimantan Tengah: Species Composition, Carbon Dioxide Uptake and Oxygen Production of Woody Vegetation in The Batu Bulan Community Forest Gunung Mas District, Central Kalimantan Junaedi, Ajun; Aruan, Jenifer; Yosep, Yosep; Penyang, Penyang; Surasana, I Nyoman; Rizal, Moh
HUTAN TROPIKA Vol 19 No 1 (2024): Volume 19 Nomor 1 Tahun 2024
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v19i1.13188

Abstract

Community Forestry is one of the schemes in provides access to forest management legally to the community, so community forestry has a role in supporting the sustainability of forest functions. In line with the principles of sustainable forest management, community forestry management is required to maintain a balance of ecological, economic, and social aspects. The purpose of the study was to identify the species composition and estimate the potential biomass reserves, carbon, carbon dioxide (CO2) absorption, and oxygen (O2) production of woody vegetation in the Batu Bulan Community Forest, Tusang Raya Village, West Rungan District, Gunung Mas Regency, Central Kalimantan Province. Vegetation data collection with vegetation analysis techniques using the plot line method. Data from the analysis of woody vegetation was then calculated for the number of species, Shannon Wienner species diversity index (H'), vegetation density, and Important Value Index (IVI). Calculation of vegetation biomass using destructive and non-destructive methods. While the calculation of carbon, CO2 uptake, and O2 production of woody vegetation were each calculated using SNI 7724 (2019), IPCC (2006), and Nowak et. al (2007). The results showed that the number of woody vegetation species found was 31 species included in 19 families with a Shannon Wienner species diversity index value of 2.81 ("medium" category). Tree and pole-level woody vegetation was dominated by Laban (Vitex pubescens Vahl.), while sapling and seedling levels were dominated by Rubber (Hevea brasiliensis) and Palasit (Canarium sp), respectively. The potential reserves of biomass, carbon, CO2 uptake, and O2 production of woody vegetation were 70.12 tons/ha, 32.81 tonsC/ha, 120.96 tonsCO2/ha, and 88.01 tonsO2/ha, respectively.  
Struktur Komunitas Vegetasi Pada Blok Perlindungan di Kawasan Taman Hutan Raya Lapak Jaru Kabupaten Gunung Mas: Vegetation Community Structure in Protection Block in The Lapak Jaru Highway Forest Park Area Gunung Mas District Setiarno, Setiarno; Sopya, Sopya; Tanduh, Yusinta; Junaedi, Ajun; Yulianti, Reri
HUTAN TROPIKA Vol 19 No 1 (2024): Volume 19 Nomor 1 Tahun 2024
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v19i1.14243

Abstract

Botanical Forest Park (Tahura) is very important to support human life and the environment. The purpose of the study was to analyze the structure of the vegetation community, including the level of diversity, and the similarity of the vegetation community. The research method follows the sampling technique procedure with the plot method. Data were analyzed using the Index of Important Value to test the mastery of the species, the Shannon-Wiener Index to test the level of diversity of vegetation species, and community stability, community similarity index to test the similarity between flora communities. The results obtained are the value of the species diversity index, in general, is included in the medium category, which means that productivity is sufficient, ecosystem conditions are quite balanced, and ecological pressure is moderate. The species evenness index is high, the species richness index is in the medium category, and the similarity index between plant communities is very high.
Kajian Tingkat Kerawanan Erosi Tanah Berbasis Spasial dan Survei Lapangan di Kecamatan Tewah, Kabupaten Gunung Mas, Provinsi Kalimantan Tengah: Assessment Of Soil Erosion Vulnerability Level Based on Spatial and Field Survey In Tewah Sub-District, Gunung Mas Regency Central Kalimantan Province Saputra, Jodi; Sukarna, Raden Mas; Junaedi, Ajun; Rizal, Moh
HUTAN TROPIKA Vol 19 No 2 (2024): Volume 19 Nomor 2 Tahun 2024
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v19i2.16588

Abstract

This study aims to identify and map the level of soil erosion vulnerability in Tewah Sub District, Gunung Mas Regency, Central Kalimantan Province. Identification of the level of soil erosion vulnerability was carried out using parameters of slope, soil type, rainfall and land cover. Field surveys were conducted to collect data on the area of ​​tree canopy cover at each level of erosion vulnerability. The results of the study indicate that in Tewah Sub District, which is included in the Kahayan Sub-Watershed have 5 levels of soil erosion vulnerability with categories of not vulnerable, less vulnerable, quite vulnerable, vulnerable and very vulnerable. Furthermore, it is known that ±50.23% of the research location area is included in the category of quite vulnerable and only ±0.29% is included in the category of not vulnerable. The value of ​​tree canopy cover has a significant effect on the level of soil erosion vulnerability. The higher the area of ​​tree canopy cover, the lower the level of erosion vulnerability. Thus, it can be concluded that erosion vulnerability due to lack of forest cover, especially in Tewah Sub District, must be a priority in handling to support the carrying capacity of the environmental ecosystem.
Ekostruktur Vegetasi di Sekitar Ramin (Gonystylus bancanus) pada Kawasan Laboratorium Alam Lahan Gambut Universitas Palangka Raya: The Structure of Vegetation Communities Surrounding Ramin (Gonystylus bancanus) Trees in the Natural Laboratory Area of Palangka Raya University Peatland Setiarno; Nababan, Suzet Rotua Tanya; Hidayat, Nisfiatul; Rotinsulu, Johanna Maria; Junaedi, Ajun
HUTAN TROPIKA Vol 19 No 2 (2024): Volume 19 Nomor 2 Tahun 2024
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v19i2.16780

Abstract

The purpose of this study is to examine the vegetation's composition and ecostructure surrounding the Ramin tree (Gonystylus bancanus) in the University of Palangka Raya's Natural Laboratory of Peatlands. Vegetation data collection was carried out using the quadrat plot technique, with the plot placement applied through purposive systematic sampling. The Importance Value Index (IVI), species dominance index, diversity index, and evenness index were employed to examine the data from this research graphic using Microsoft Excel. In this study, 47 different plant species from different communities were identified and divided into 38 genera and 27 families (trees, poles, saplings and seedlings). The greatest number of species were found in the groups Myrtaceae and Dipterocarpaceae. There are no dominant species in the area with Nyatoh, Jambu-jambu, and Mangkinang nearly always occupy the five dominant species ranks from seedling to tree level at all peat thickness levels. While the species evenness index in all plant communities and the level of peat thickness are in the high/abundance category of almost evenly (E = 0.76 – 0.95), the majority of species diversity index (Shannon-Wiener value) in the research plots are classified as high (H'>3), indicating that the condition of the forest ecosystem at that location is relatively stable. Keywords: ecostructure, natural laboratory, peatlands, Ramin tree, vegetation
Analisis Kerusakan Akibat Hama dan Penyakit pada Tegakan Balangeran (Shorea balangeran (Korth.) Burck) dan Meranti Tembaga (Shorea leprosula Miq) di Kota Palangka Raya : Analysis of Pest and Disease Damage in Balangeran (Shorea balangeran (Korth.) Burck) and Meranti Tembaga (Shorea leprosula Miq) Stands in Palangka Raya City Firdara, Eritha Kristiana; Penyang, Penyang; Sosilawaty, Sosilawaty; Junaedi, Ajun; Hidayat, Ricky Dwi
HUTAN TROPIKA Vol 19 No 2 (2024): Volume 19 Nomor 2 Tahun 2024
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v19i2.18593

Abstract

This study aims to identify diseases and pests, assess the level of stand damage, and compare the level of damage to Balangeran (Shorea balangeran (Korth.) Burck) and Meranti copper (Shorea leprosula Miq) stands on the Green Campus of Palangka Raya University. Sampling was conducted using purposive sampling method with 5% intensity with a total of 150 stands for balangeran and 135 stands for copper meranti. Sampling in the field used a diagonal pattern by taking five sides of each stand plot. The results showed that the dominant pests attacking balangeran and meranti copper stands were green grasshoppers (Oxya chinensis), termites (Coptotermes curvignathus Holmgren), leaf bugs (Pentatomidae), moth caterpillars (Labeda nobilis), bag caterpillars (Metisa plana), for diseases, namely leaf spot (Coletotrichum sp), leaf spot (Pestaliopsis sp), leaf spot (Phomopsis vexans). The frequency of attack and intensity of pest and disease attack from both planting locations showed that the planting area in the nursery for pests was higher than the seed garden area while for diseases in the seed garden area was lower than the nursery area
Kontribusi Serapan Karbondioksida Tegakan Balangeran (Shorea balangeran (Korth.) Burck) dan Meranti Tembaga (Shorea leprosula Miq.) dalam Aksi Mitigasi Perubahan Iklim: Contribution of Carbon Dioxide Uptake The Stands of Balangeran (Shorea Balangeran (Korth.) Burck) and Copper Meranti (Shorea Leprosula Miq.) in Actions Climate Change Mitigation Junaedi, Ajun; Saragih, Harry Martua; Yosep, Yosep; Indrayanti, Lies; Yulianti, Reri; Rizal, Moh
HUTAN TROPIKA Vol 20 No 1 (2025): Volume 20 Nomor 1 Tahun 2025
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v20i1.20038

Abstract

This study aims to identify the distribution pattern of stem diameter and estimate the potential of biomass storage, carbon and CO2 uptake above ground of Balangeran (Shorea balangeran (Korth.) Burck) stands aged ± 5 years in the People's Seedling Garden and Copper Meranti (Shorea leprosula Miq.) aged ± 7 years in the Green Campus Seedling Garden of Palangka Raya University. The calculation method of estimating biomass and carbon storage and CO2 uptake of Balangeran and Copper Meranti stands in a non destructive manner using the Jaya et. al (2007), Heriansyah et. al (2009), SNI 7724 (2019) and IPCC (2006) allometric equations. The results showed that the distribution pattern of the diameter class distribution of Balangeran and Copper Meranti stands resembled a bell/ginger-shaped curve. The stem diameter class of Balangeran stands is dominated by 5-7 cm and Copper Meranti 8-10 cm. Balangeran stands have potential biomass storage of 70,715 tons/ha, carbon of 33,236 tonsC/ha and CO2 uptake of 121,976 tonsCO2/ha. While Copper Meranti stands have potential biomass storage of 29,307 tons/ha, carbon of 13,774 tonsC/ha and CO2 uptake of 50,552 tonsCO2/ha. Balangeran and Coper Meranti stands have a strategic contribution to climate change mitigation actions.
Co-Authors Aruan, Jenifer Firdara, Eritha Kristiana Gimson Luhan Hendra Toni Hidayat, Nisfiatul Hidayat, Ricky Dwi Indrayanti, Lies Johanna Maria Rotinsulu Madiyawati, Milad Moh. Rizal, Moh. Mujaffar, Ahmad Nababan, Gabriella SN Nababan, Suzet Rotua Tanya Nababan, Suzet Rotua Tasya Penyang, Penyang Raden Mas Sukarna, Raden Mas Rizal, Moh Robby Octavianus Saputra, Jodi Saragih, Harry Martua Sari , Nurmila Setiarno Setiarno, Setiarno Sinaga, Fani Delima Sari Sopya, Sopya Sosilawaty, Sosilawaty Surasana, I Nyoman Tanduh, Yusinta Yosep Yosep Yulianti, Reri