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All Journal Jurnal Hutan Tropika Innovative: Journal Of Social Science Research
Raden Mas Sukarna, Raden Mas
Forestry Department, Faculty of Agriculture, Palangka Raya University, Palangka Raya, Central Kalimantan, Indonesia
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Journal : Jurnal Hutan Tropika

 1 
Sifat Fisika Mekanika Papan Semen dari Limbah Penggergajian Berdasarkan Komposisi Jenis Serbuk Kayu Meranti Merah (Shorea Leprosula Miq) dan Terentang (Campnosperma Spp) : Mechanical physical Properties of Cement Board made from Sawmill Waste Based on Saw Dust Composition of Red Meranti (Shorea leprosula Miq) And Terentang (Campnosperma Spp Sitorus, Sitorus; Koroh, Desy Natalia; Joni, Herwin; Sukarna, Raden Mas; Silvianingsih, Yosefin Ari
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.v18i2.12008

Abstract

This research aims to determine 1) the effect of the composition of red meranti and terentang sawmill waste to physical and mechanical properties of wood dust cement board according to SNI 03-2105-2006 and 2) determine the physical and mechanical properties of red meranti and terentang sawmill waste particle cement board the best based on SNI standards. The research method used a single factor Completely Randomized Design with five levels, namely A1(100% red meranti), A2(100% terentang), A3(50% red meranti: 50% terentang), A4(75% red meranti: 25% terentang) and A5 (25% red meranti: 75% terentang) using sawdust: cement ratio of 1:2, each treatment was repeated three times so that the number of sawdust cement boards made were fifteen pieces of sawdust cement board. The test parameters are physical properties (density, moisture content and thickness swelling) and mechanical properties (MoE, MoR and screw holding). Next, test the data for normality using Kolmogrov-Smirnov (SPSS 24). The results of research on the treatment of the composition of sawdust from red meranti and terentang using a cement sawdust ratio of 1:2 not significant effect on the physical and mechanical properties of sawdust cement board, because the specific gravity of red meranti wood and terentang did not significant different. The physical properties of sawdust cement board meet SNI 03-2105-2006, the best treatment was A1 (100% red meranti wood) for water content (9.09%) and thickness swelling (1.53%) while for density the best is in A4 powder composition (75 %: 25%, red meranti: terentang). The overall average value of mechanical properties does not meet SNI 03-2105-2006.
Artikel ini telah di CABUT: Kajian Konflik Tenurial Hutan Berbasis Perubahan Tutupan Lahan di KSA/KPA Bukit Rawi Kabupaten Pulang Pisau Provinsi Kalimantan Tengah (Artikel ini sudah di TARIK atau Sudah di CABUT Berdasarkan Permintaan Penulis): ARTIKEL INI TELAH TARIK ATAU DI CABUT BERDASARKAN PERMINTAAN PENULIS Indira, Maulida; Amelia, Vera; Sukarna, Raden Mas
HUTAN TROPIKA Vol 19 No 1 (2024): Volume 19 Nomor 1 Tahun 2024
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

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Abstract

Kepada Yth Pembaca Jurnal Perihal : Pengumuman Pencabutan Jurnal Dengan ini Kami, selaku manajemen pengelola Jurnal Hutan Tropika (JHT)  menyampaikan mohon maaf, bahwa  Artikel berjudul : KAJIAN KONFLIK TENURIAL HUTAN BERBASIS PERUBAHAN TUTUPAN LAHAN DI KSA/KPA BUKIT RAWI KABUPATEN PULANG PISAU PROVINSI KALIMANTAN TENGAH, telah di lakukan PENCABUTAN ARTIKEL ATAU PENARIKAN ARTIKEL berdasarkan PERMINTAAN PENULIS/ PENULIS KORESPONDEN, pada SURAT PERMOHONAN PENCABUTAN ARTIKEL tanggal 13 Agustus 2024. Sebagai pengelola Jurnal, kami ucapkan mohon maaf kepada semua pembaca pada Jurnal Hutan Tropika (JHT) atas pencabutan jurnal atau Manuskrip ini. Demikian, Palangka Raya, 13 Agustus 2024   Prof. Dr. Ir. Wahyudi, M.P. IPU.
Potensi Pertumbuhan Tanaman Jelutung Rawa di Kecamatan Jabiren Raya Kabupaten Pulang Pisau : Potential Growth of Swamp Jelutung Plants in Jabiren Raya District, Pulang Pisau Regency Gaman, Sampang; Rotinsulu, Johanna Maria; Sukarna, Raden Mas; Penyang, Penyang; Nuwa, Nuwa
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.v19i1.14448

Abstract

The cultivation of swamp jelutong plants on peat swamp land has been widely practiced by communities in Central Kalimantan Province. However, jelutong cultivation efforts are prone to failure due to various factors such as land fires and other factors. The Indonesian government through the Ministry of Forestry in 2003-2005 carried out the Forest and Land Rehabilitation Movement, which involved planting unproductive land in state forest areas and community forests with local species such as jelutong, pulai, balangeran and other species. After almost 20 years of planting Jelutung, information related to the growth and sap potential of Jelutung swamp is not yet available. The purpose of the study was to analyze the potential growth of diameter and height of jelutong plants. This research was conducted for 3 months from October-December 2023. The location of the research was specifically carried out in Jabiren Raya Sub-district (Jelutung plantation of Mr. Margo) and (Jelutung plantation in Jabiren) Pulang Pisau District. The method used to study the dynamics of jelutong plant growth and sap potential was purposive sampling, by selecting and determining jelutong plants based on the age class of jelutong plants with a sampling intensity of ± 5% of the area, the measurement results were analyzed through correlation regression tests in the form of tables and graphs. The results of research conducted in 2 locations show the results of measurements of diameter and height growth of jelutong plants.
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.
Kajian Pertumbuhan Diameter dan Tinggi Pohon Jelutung (Dyera polyphylla (Miq.) di Kota Palangka Raya: Study on Diameter and Height Growth of Jelutung in Palangkaraya Central Kalimantan Gaman, Sampang; Sukarna, Raden Mas; Rotinsulu, Johanna Maria; Penyang, Penyang; Nuwa, Nuwa
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.v20i1.19670

Abstract

Peat swamp forests are dominated by local tree types that have economic value, such as ramin, merani, nyatoh and jelutung. Jelutung trees provide benefits in the form of wood and sap, in addition, swamp jelutung is an ideal type for the rehabilitation of peat swamp forests that are resistant to flooded peatlands. Based on the above problems, it is necessary to conduct a study to analyze the relationship between the growth of the diameter and height of the jelutung plant. This research was carried out in 2023 in community jelutung gardens in Palangka Raya City. The method used to study the growth dynamics of jelutung trees is carried out by purposive sampling, namely by selecting and determining jelutung trees based on the age class of jelutung trees with a sampling intensity of ±5% of the area or number of trees. The results of measuring the diameter and height of the tree were analyzed through a correlation regression test displayed in the form of tables and graphs. The results of the study at the location of the jelutung plantation in Bukit Tunggal Village showed that the relationship between the diameter and height of the tree in the farmer's garden 1 had a coefficient interval value of 0.9476 and the relationship between the diameter and height of the tree in the farmer's garden 2 showed a coefficient interval value of 0.9563. while the location of the jelutung plantation in Kalampangan Village showed the relationship between the diameter and height of the jelutung tree in the farmer's garden 1 with a coefficient interval value of 0, 9151, the relationship between the diameter and height of the tree in the farmer's garden 2 was 0.8277 and the relationship between the diameter and height of the tree in the farmer's garden 3, farmer 4 and farmer 5 was 0.79551. This value shows that there is a very strong and positive relationship between the two variables.
Co-Authors Gaman, Sampang Indira, Maulida Johanna Maria Rotinsulu Joni, Herwin Junaedi, Ajun Koroh, Desy Natalia Nuwa, Nuwa Penyang, Penyang Rizal, Moh Saputra, Jodi Silvianingsih, Yosefin Ari Silvika, Okta Sitorus Sitorus Vera Amelia