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Koroh, Desy Natalia
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Agriculture, Biological Sciences & Forestry

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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.
Persepsi Pekerja Terhadap Tingkat Kesejahteraan Di Pengumpul Rotan UD Putra Harapan: Workers' Perceptions of Welfare Levels At the UD Putra Harapan Rattan Collector Purba, Brima Juntama; Jemi, Renhart; Koroh, Desy Natalia; Nursiah, Nursiah; 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.v19i1.13468

Abstract

Rattan is a type of palm tree that grows in tropical climates. Rattan currently has a low price level with limited rattan raw materials. However, rattan collectors continue to buy rattan from farmers and provide jobs for their workers with low wages, but rattan workers continue to work. Based on this background, research was conducted which aimed to analyze the level of worker welfare based on the Regional Minimum Wage (UMR) and the Central Statistics Agency (BPS); as well as knowing workers' perceptions of their level of welfare at UD Putra Harapan. The data collection method uses observation and structured interviews with key respondents. Data analysis uses a Likert Scale to measure respondents' perceptions and uses analysis of worker welfare levels based on UMR and BPS. The research results show: the level of welfare of workers does not meet the minimum wage individually, but if we look at each household, the respondent's income exceeds the minimum wage. Meanwhile, based on BPS, the level of worker welfare is included in the high classification. The perception of rattan workers at UD Putra Harapan states that their level of welfare is relatively good.
Kombinasi Perlakuan Suhu, Lama Perendaman dan Jenis Air Terhadap Perkecambahan Benih Trembesi (Samanea saman (Jacq.) Merr.): Combination of temperature treatment, saoking time and water on Trembesi Seed (Samanea saman (Jacq.) Merr.) Germination Sudomo, Muhammad Fadhil Amiruddin; Dwiastuti, Rini; Madiyawati, Milad; Koroh, Desy Natalia; Tambun, Kesia Br Tarigan
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.v19i1.14274

Abstract

This study aims to determine the effect of seed soaking temperature in room temperature water (240C) and (600C), determine the effect of soaking time at the level of 0 hours (control), 6 hours, 12 hours, 18 hours, determine the effect of the type of soaking water, namely Kahayan River water, Peat water, PDAM water, Aquades water, and determine the effect of all the best interactions on the germination of Trembesi tree seeds. The research method used a complete randomized design (CRD) Factorial A x B x C, each factor A = 2 levels namely A1 (240C) and A2 (600C), factor B = 4 levels namely B1 (0 hours) without control, B2 (6 hours), B3 (12 hours), B4 (18 hours), factor C = 4 levels namely C1 (khayan river water), C2 (peat water), C3 (PDAM water), C4 (distilled water) with 3 replicates. The results showed that water with a temperature of 600C for a soaking time of 6 hours and soaking in peat water produced the best germination of Trembesi tree seeds because the temperature can help the process of breaking down food reserves so that enzymes work well and soaking for 6 hours can absorb water so that the softening of the seed coat and the development of the seed coat and the soaking water used has a high content of organic matter and carbon substances that are acidic with a pH of 3.8 which can soften the seed coat so as to accelerate the germination process. The interaction factor of temperature, soaking time, and soaking water (AxBxC) at a temperature of (600C) for 6 hours using peat water produces the best germination of Trembesi tree seeds.
Studi Kelayakan Tanaman Rasau (Pandanus helicopus ) Sebagai Bahan Baku Papan Partikel : Feasibility Study of Rasau Plant (Pandanus helicopus) As Raw Material for Particle Board Koroh, Desy Natalia; Saputera, Saputera; Jemi, Renhart; Santoso, Mahdi
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.v19i2.18599

Abstract

The rasau plant grows in riparian forest areas within tropical peat swamp forests. It is a lignocellulosic material with potential as a raw material for particleboard. Before being used as a raw material, a feasibility study must be conducted on the rasau plant (Pandanus helicopus). The stems of rasau were analyzed for cell dimensions, cell proportions, chemical composition, and physical and mechanical properties. The results indicate that the fiber dimensions and proportions, as well as the physical and mechanical properties, demonstrate that rasau stems are suitable for use as a raw material for non-structural particleboard. Rasau can be utilized as a raw material for particleboard, provided the particles undergo cold water soaking and use phenol-formaldehyde or melamine-formaldehyde resin adhesives, followed by hot pressing
Eksplorasi Pewarna Alami Di Vegetasi Hutan Resort Habaring Hurung Taman Nasional Sebangau Dengan Menggunakan Teknik Ecoprint: Exploration of Natural Dyes in the Forest Vegetation of Habaring Hurung Resort, Sebangau National Park, Using the Ecoprint Technique Damanik, Mei Cintya Angelia; Tanduh, Yusintha; Misrita, Misrita; Afentina, Afentina; Koroh, Desy Natalia
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.v20i1.20686

Abstract

This study aims to identify vegetation species with potential as natural dyes and to describe the color direction, motif quality, and color fastness of ecoprint results using vegetation from the Habaring Hurung Forest Resort, Sebangau National Park. The research background is based on the biodiversity richness of peat swamp forests that has not been optimally utilized as a source of natural dyes in local wisdom-based creative industries. The ecoprint technique was selected for its eco-friendly nature and its ability to directly transfer the shape and natural color of leaves onto fabric. This research used a qualitative exploratory approach through field observation, interviews, documentation, and laboratory experiments. Vegetation sampling was conducted using a transect method covering an area of 0.4 hectares. The ecoprint process included mordanting, pounding, steaming, fixation, and color fastness testing. Color analysis referred to the Asianpaints color catalog, while motif quality was evaluated based on the visibility of leaf venation. The results identified 15 vegetation species with potential as natural dyes, including Tagula (Litsea sp.), Sepat (Macaranga trichocarpa), Mahang Kirik (Macaranga mauritia), and Kopi Himba (Coffea sp.). The dominant color directions produced were green, gray, and blue. The highest motif quality was found in Mahang Kirik, with clearly defined leaf veins, while the color fastness of most ecoprint fabrics remained stable after two washes. This indicates that the mordanting and fixation processes using iron mordant (tunjung) were effective in preserving color intensity. In conclusion, the peat forest vegetation in this area holds great potential as a source of natural dye for ecoprinting. These findings are expected to support the development of non-timber forest product (NTFP)–based crafts that promote forest conservation and empower surrounding communities.
Identifikasi dan Pemanfaatan Tumbuhan Obat Tradisional di Resort Habaring Hurung TN Sebangau: Identification And Utilization Of Traditional Medicinal Plants At The Habaring Hurung Resort, TN Sebangau Rosdiana, Rosdiana; Madiyawati, Milad; Koroh, Desy Natalia; Putir, Patricia Erosa; Sianipar, Ayu Cica Pratiwi
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.v20i1.20764

Abstract

Indonesia has a high biological wealth, including various types of medicinal plants that are traditionally used by the community. This study aims to identify the types of medicinal plants and their use in Sebangau National Park, especially in the Habaring Hurung Resort. The approach used is descriptive qualitative, with an exploratory survey method. Data were collected through field observations, semi-structured interviews with key informants (traditional leaders, shamans, and local knowledgeable residents), and visual documentation. Research on medicinal plants in the Habaring Hurung Resort, Sebangau National Park, successfully identified 23 species of medicinal plants used in the traditional healing practices of the local community. The species are spread across 16 families, as well as one unidentified species (pari laki) with a dominance of the Lauraceae and Arecaceae families with the most widely used plant parts being the roots, bark and fruit. These findings indicate the great potential of Sebangau National Park as a source of medicinal plants and the importance of preserving the traditional knowledge of local communities
Co-Authors Afentina, Afentina Damanik, Mei Cintya Angelia Jemi, Renhart Joni, Herwin Madiyawati, Milad Mahdi Santoso Misrita, Misrita Muhammad Fadhil Amiruddin Sudomo Nursiah Nursiah, Nursiah Nuwa, Nuwa Patricia Erosa Putir, Patricia Erosa Purba, Brima Juntama Raden Mas Sukarna, Raden Mas Rini Dwiastuti Rosdiana Rosdiana Saputera, Saputera Sianipar, Ayu Cica Pratiwi Silvianingsih, Yosefin Ari Sitorus Sitorus Tambun, Kesia Br Tarigan Tanduh, Yusintha