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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
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (391.495 KB) | 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.
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

Abstract

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

Abstract

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

Abstract

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%.
ESTIMASI JUMLAH KARBON VEGETASI YANG HILANG AKIBAT KEGIATAN PEMANENAN KAYU DI HUTAN ALAM TROPIS Estimation of Total Loss Vegetation Carbon by Timber Harvesting in Tropical Natural Forest Ajun Junaedi
Jurnal Hutan Tropis Vol 2, No 2 (2014): Jurnal Hutan Tropis Volume 2 Nomer 2 Edisi Juli 2014
Publisher : Lambung Mangkurat University-Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (501.876 KB) | DOI: 10.20527/jht.v2i2.1576

Abstract

Kegiatan pemanenan kayu menyebabkan kerusakan tegakan tinggal, tanah dan keterbukaan areal hutan yang berpengaruh terhadap simpanan biomasa dan karbon vegetasi di atas dan di bawah permukaan tanah. Tujuan penelitian ini adalah untuk menduga jumlah karbon vegetasi di atas permukaan tanah yang hilang akibat kegiatan pemanenan kayu dengan sistem silvikultur Tebang Pilih Tanam Indonesia (TPTI) di areal IUPHHK-HA  PT Sindo Lumber Kalimantan Tengah. Biomasa vegetasi diduga dengan menggunakan rumus allometrik Chave, et. al. (2005) dan sekitar  47 % dari biomasa  merupakan  kandungan karbon vegetasi yang tersimpan. Pendekatan yang digunakan untuk menghitung jumlah karbon vegetasi yang hilang adalah dengan membandingkan simpanan karbon di hutan primer dengan hutan yang sudah dilakukan kegiatan penebangan. Sedangkan  pendugaan jumlah emisi CO2 yang terlepas ke atmosfir merupakan hasil perkalian jumlah karbon yang hilang dengan faktor konversi dari C menjadi CO2 sebesar 3,67 (IPCC, 2006). Hasil penelitian menunjukkan bahwa dampak pemanenan kayu dengan sistem silvikultur TPTI menyebabkan jumlah karbon yang hilang sebesar 80,94 tonC/ha/tahun dan emisi CO2 yang terlepas ke atmosfir sebesar 297,02 tonCO2/ha/tahun. Jumlah karbon yang hilang pada vegetasi tingkat pohon lebih tinggi (78,38 %) dibandingkan tingkat tiang, pancang dan semai.Kata Kunci : karbon, karbon dioksida, pemanenan kayu, vegetasi
STRUKTUR DAN KOMPOSISI VEGETASI DI AREAL BEKAS TEBANGAN BERDASARKAN ZONE KELERENGAN Ajun Junaedi; Nisfiatul Hidayat
Jurnal Hutan Tropis Vol 3, No 1 (2015): Jurnal Hutan Tropis Volume 3 Nomer 1 Edisi Maret 2015
Publisher : Lambung Mangkurat University-Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6009.938 KB) | DOI: 10.20527/jht.v3i1.4170

Abstract

Penelitian ini bertujuan untuk membandingkan struktur dan komposisi  vegetasi di hutan primer dan areal bekas tebangan 2 tahun pada zone kelerengan datar (0-8 %) dan agak curam (15-25 %) di IUPHHK-HA PT Indexim Utama Kalimantan Tengah. Penentuan lokasi penelitian dengan metode purposive sampling dan pola penarikan sampel menggunakan metode petak tunggal dengan luasan masing-masing petak 80 m x 80 m yang di dalamnya terdapat sub-sub petak ukur (nested sampling). Hasil penelitian menunjukkan struktur vegetasi horizontal di areal bekas tebangan 2 tahun pada zone kelerengan datar mengalami penurunan jumlah kerapatan vegetasi yang signifikan pada kelas diameter >39 cm sebesar 75,86%. Sedangkan struktur vegetasi vertikal juga mengalami penurunan jumlah kerapatan vegetasi yang siginifikan pada kelas tinggi 10-14 m di lokasi dan kelerengan yang sama sebesar 66,20%. Jumlah jenis yang ditemukan paling banyak pada kelerengan datar terdapat di areal bekas tebangan 2 tahun (13-17 jenis) dibandingkan hutan primer (11-12 jenis). Kondisi sebaliknya terjadi pada kelerengan  agak curam, dimana jumlah jenis yang ditemukan di hutan primer lebih tinggi (13-21 jenis) dibandingkan areal bekas tebangan 2 tahun (12-17 jenis). Vegetasi tingkat tiang mengalami pergeseran dominansi jenis di areal bekas tebangan 2 tahun pada zone kelerengan datar dan agak curam berdasarkan Indeks Nilai Penting (INP). Indeks keanekaragaman jenis Shannon-Wienner (H’) di semua lokasi penelitian pada zone kelerengan datar dan agak curam termasuk dalam kategori “sedang”.Kata Kunci: struktur dan komposisi, vegetasi, areal bekas tebangan, kelerengan Penulis 
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

Abstract

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
ANALISIS KETERBUKAAN TANAH HUTAN AKIBAT KEGIATAN PEMBUKAAN WILAYAH HUTAN DI HUTAN ALAM PRODUKSI Ajun Junaedi; I Nyoman Surasana; Moh Rizal; Gery Lineker Barus
Agrienvi: Jurnal Ilmu Pertanian Vol. 17 No. 01 (2023): Juni 2023 : Agrienvi : Jurnal Ilmu Pertanian
Publisher : Agrienvi: Jurnal Ilmu Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/aev.v17i01.8687

Abstract

Terjadinya keterbukaan tanah hutan dalam kegiatan pengelolaan hutan, salah satunya disebabkan kegiatan pembukaan wilayah hutan, seperti: pembuatan jaringan jalan hutan (jalan utama, jalan cabang, jalan sarad), TPn, TPK, base camp dan lain sebagainya. Penelitian ini bertujuan  (a) menghitung kerapatan jaringan jalan hutan, meliputi: jalan utama, jalan cabang dan jalan sarad; (b) menghitung persen keterbukaan tanah hutan akibat kegiatan pembukaan wilayah hutan (pembuatan jalan utama, jalan cabang, jalan sarad dan TPn. Lokasi penelitian di IUPHHK-HA PT Bumimas Abadi Kalimantan Tengah. Hasil penelitian menunjukkan bahwa kerapatan jaringan jalan hutan berkisar 3,54 – 36,48 m/ha. Persen keterbukaan tanah hutan akibat kegiatan pembukaan wilayah hutan (pembuatan jalan utama, jalan cabang, jalan sarad dan TPn) berkisar 0,42 – 10,21%. Jalan sarad memiliki kerapatan jaringan jalan hutan dan persen keterbukaan tanah hutan yang paling tinggi dibandingkan dengan jalan utama dan jalan cabang.
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

Abstract

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

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.
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