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All Journal Agrienvi : Jurnal Ilmu Pertanian Jurnal Hutan Tropika JURNAL HUTAN TROPIS

Ajun Junaedi

Jurusan Kehutanan Fakultas Pertanian Universitas Palangka Raya

Author-ID : 3396594

Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences

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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) Ajun Junaedi; Moh Rizal
HUTAN TROPIKA Vol 14 No 2 (2019): Volume 14 Nomor 2 Tahun 2019
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

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.

POTENSI BIOMASSA, KARBON DAN SERAPAN KARBONDIOKSIDA TUMBUHAN BAWAH DI HUTAN RAWA GAMBUT PROVINSI KALIMANTAN TENGAH: Potency of Biomass, Carbon and Carbondioxide Absorption Understorey in Peat Swamp Forest, Central Kalimantan Province Ajun Junaedi; Christopheros; Moh Rizal; Tioliliani Lubis
HUTAN TROPIKA Vol 15 No 2 (2020): Volume 15 Nomor 2 Tahun 2020
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v15i2.2168

This study aims to identify the species composition and estimate the potency for biomass, carbon and carbondioxide (CO2) uptake of understorey at a peat depth of 1 - <2 m; 2 - <4 m; 4 - <8 m and 8 - <12 m in Sebangau National Park Central Kalimantan. The results showed that the total number of understorey species found in all peat depths was 21 species. The most common understorey species found were at peat depths of 4 - <8 m, with 13 species. Several understorey species that dominate the entire peat depth are Pandanus tectorius, Pandanus amaryllofolius and Stenochlaena palustris. The potency of understorey biomass, carbon storage and CO2 absorption in all peat depths ranged from: 1.73 to 2.71 tons/ha; 0.81 - 1.30 tonC/ha and 2.98 - 4.77 tonsCO2/ha. Understorey that grows at a peat depth of 4 - <8 m has the highest potency for biomass, carbon and CO2 absorption.Keywords: biomass, carbon, carbondioxide, peat swamp forest, understorey

Potensi Biomassa dan Karbon Vegetasi Hutan Rawa Gambut di Petak Ukur Permanen Hutan Pendidikan Hampangen Universitas Palanka Raya Kalimantan Tengah: Potency of Biomass and Carbon Vegetation of Peat Swamp Forest in The Permanent Sample Plot The Hampangen Educational Forest, Palangka Raya University, Central Kalimantan Johanna Maria Rotinsulu; Ajun Junaedi; Yanarita; Nuwa; Robby Octavianus
HUTAN TROPIKA Vol 16 No 2 (2021): Volume 16 Nomor 2 Tahun 2021
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v16i2.3593

The purpose of this study (a) determine the composition and structure of vegetation based on the growth rate (tree, pole, sapling, seedling) in each Permanent Sample Plot (PSP); (b) to calculate the potency of biomass and carbon in vegetation trees level, poles and sapling on each PSP. The results showed that the number of vegetation species found in PSP-1 as many as 47 species with 28 family and PSP-2 of 33 species with 24 family. The vegetation of species that dominate based on the level of growth (tree, pole, sapling, seedling) in the PSP-1 consists of : Gerunggang (Cratoxylum arborescens (Vahl) Blume) and Jambu-jambu (Syzigium sp). In PSP-2 of vegetation species that dominance Tumih (Combretocarpus rotundatus (Miq.) Danser) and Jambu-jambu (Syzigium sp). The structure of the vegetation horizontally in the PSP-1 and PSP-2 dominated the vegetation of the small diameter and structure of the vegetation vertical in the dominance of vegetation including the stratum D. The average value the species diversity indexs vegetation tree level, pole, sapling and seedling in PSP-1 at 2.09 included in the category of “medium” and in PSP-2 of 1.83 which is included in the category of “low”. The potency vegetation biomass total in PSP-1 and PSP-2 respectively 152.69 tons/ha and 122.93 tons/ha as well as the potency carbon vegetation total in PSP-1 and PSP-2 respectively 71.76 tons/ha and 57.78 tons/ha.

Karakteristik Jaringan Jalan dan Keterbukaan Tanah Hutan Akibat Kegiatan Pembukaan Wilayah Hutan (Studi Kasus di IUPHHK-HA PT Sindo Lumber Kalimantan Tengah): Characteristics of The Roads Network and Openness Forest Land Due to Activity Forest Opening Area-Case Study at IUPHHK-HA PT Sindo Lumber Central Kalimantan Ajun Junaedi; I Nyoman Surasana; Mohammad Rizal; Santa Tri Dwi Sartika Waruwu
HUTAN TROPIKA Vol 16 No 2 (2021): Volume 16 Nomor 2 Tahun 2021
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v16i2.3594

The purpose of this study: a) to determine the characteristic parameters the forest roads network, such as: density forest roads, spacing forest roads, average distance skid trails, correction factor and quality forest opening area; (b) calculate the percent openness forest land due to activities making main roads network, branch roads, skid trail and TPn. The location research in block harvesting RKT 2018 at IUPHHK-HA PT Sindo Lumber Central Kalimantan. The results showed density the forest roads network ranged between 7.96 – 17.66 m/ha, 1256.28 m main road spacing, 1097.69 m branch road spacing, 566.25 m skid trail spacing, 146.5 m average distance skid theoritical (REo), 186.83 m REm and 252.30 m REt. The correction factor value of the roads network (Vcorr), Tcorr and the correction factor forest opening area (KG) respectively by 1.27, 1.35 and 1.71 with the quality forest opening area included in the category of “very good”. While the percent of the openness forest land due to making main roads network, branch roads, skid trail and TPn respectively by 0.87%, 0.73%, 3% and 0.53%.

Serapan Karbondioksida Vegetasi Hutan Rawa Gambut Berdasarkan Tingkat Pertumbuhan: Vegetation Uptake of Carbon Dioxide on Peat Swamp Forests Based on The Growth Rate Ajun Junaedi; Nisfiatul Hidayat; Moh Rizal; Esti Munthe
HUTAN TROPIKA Vol 17 No 2 (2022): Volume 17 Nomor 2 Tahun 2022
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v17i2.5559

This study aims to identify the type composition and estimate the potential for biomass and carbon deposits as well as carbon dioxide (CO2) uptake of peat swamp forest vegetation based on the growth rates (seedling, sapling, pole, tree). The estimation of potential deposits of vegetation biomass is calculated by destructive and non-destructive methods. The potential for carbon impedance is calculated using the formula Bof National Standardization (2011) and CO2 absorption with the IPCC formula (2006). The results showed that the number of vegetation types found was 44 types from 25 families. Stake-level vegetation is the most common type found compared to seedlings, poles, and trees. Tree-level vegetation is dominated by Cratoxylon arborescent BI, Combretocarpus rotundatus pole level, and Stemonurus secundiflorus Blume stake level., the seedling level of Anacolosa frutescens. The potential for biomass, carbon deposits, and CO2 uptake of peat swamp forest vegetation is 179.976 tons/ha; 84.588 tons C/ha; 310.442 tons CO2/ha, respectively. Tree-level vegetation has the highest deposits of biomass and carbon as well as CO2 uptake compared to seedling, sapling, and pole levels. Youth-level vegetation (seedlings, sapling, pole) in peat swamp forests has great potential in storing biomass, carbon, and CO2 uptake in the long term. Keywords: biomass, carbon, carbon dioxide uptake, peat swamp forest, vegetation

Komposisi Jenis Vegetasi dan Karakteristik Kimia Tanah pada Tapak Tegakan Sengon dan Karet di Desa Gohong, Kabupaten Pulang Pisau Setiarno Setiarno; Amelia Noviyanti; Ajun Junaedi; Wahyu Supriyati; Rosdiana Rosdiana
HUTAN TROPIKA Vol 18 No 1 (2023): Volume 18 Nomor 1 Tahun 2023
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v18i1.8750

Plant community structure on a site has a relationship with its soil’s chemical characteristics. The research was conducted in the area of sengon and rubber stands in the administrative area of Gohong Village, Pulang Pisau District. This study aims to describe and analyze the structure of plant communities and soil chemical characteristics on the sengon and rubber stands site in Gohong Village, Pulang Pisau District. Vegetation data were collected using the stratified plot method on 9 plots placed on each stand, while soil samples for soil chemical analysis were a composite mixture of 9 drill points from each site at two depth levels, namely 0-30cm and 31-49cm. Plants found in the study site as many as 15 species belonging to 12 family, in the site of sengon stands as many as 10 species while in the site of rubber stands as many as six species. Plant species with the highest INP in the site of sengon stands are sengon and galam in the site of rubber stands are rubber. ID values range from 0.2-1.0. The depth of the peat at the research site was measured to be <50 cm with chemical characteristics of C-Organic content <5%, which was low at 4.89-6.98%, and soil acidity was very acid (pH <4.5) with a range of pH values of 3.59-3.80 and Basa Saturation (BS) was all very low with values ranging from 1.89-3.27%. Soil N-total content varied from low to medium with values ranging from 0.14-0.41%. P-availability was very low with simultaneous values of 1.18-1.41 ppm, and 0.98, and 1.19 ppm; K-dd, Ca-dd, Mg-dd, and Na-dd values were all shallow at 0.03-0.05cmol(+).kg-1, and 0.07-0.10 cmol(+).kg-1 then Ca is 0.83-1.44 cmol(+).kg-1; then Mg is the same value of 0.10 cmol(+).kg-1, and Na is 0.05-0.11 cmol(+).kg-1, while KTK is very high with a value of 49.38-60.05 cmol(+).kg-1

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 Moh Rizal; Fani Delima Sari Sinaga; Robby Octavianus; Ajun Junaedi; Gimson Luhan
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

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 Milad Madiyawati; Moh. Rizal; Gabriella SN Nababan; Ajun Junaedi; Ahmad Mujaffar; Hendra Toni
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

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; Nurmila Sari; Sosilawaty Sosilawaty; Nisfiatul Hidayat; Ajun Junaedi
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

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 Ajun Junaedi; Jenifer Aruan; Yosep Yosep; Penyang Penyang; I Nyoman Surasana; Moh Rizal
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

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.

Co-Authors Ahmad Mujaffar Amelia Noviyanti Christopheros Esti Munthe Fani Delima Sari Sinaga Gabriella SN Nababan Gery Lineker Barus Gimson Luhan Hendra Toni I Nyoman Surasana I Nyoman Surasana Jenifer Aruan Johanna Maria Rotinsulu Milad Madiyawati Moh Rizal Moh Rizal Moh. Rizal Mukhamad Najib Nisfiatul Hidayat Nisfiatul Hidayat Nisfiatul Hidayat Nurmila Sari Nuwa Penyang, Penyang Reri Yulianti Robby Octavianus Rosdiana Rosdiana Santa Tri Dwi Sartika Waruwu Setiarno Setiarno Setiarno Setiarno Sopya Sopya Sosilawaty Sosilawaty Tioliliani Lubis Wahyu Supriyati, Wahyu Yanarita Yosep Yosep Yusinta Tanduh

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