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All Journal AGRIVITA, Journal of Agricultural Science Tropical Wetland Journal Bubungan Tinggi: Jurnal Pengabdian Masyarakat Jurnal Hutan Tropika Pengabdian Kampus: Jurnal Informasi Kegiatan Pengabdian Pada Masyarakat JURNAL HUTAN TROPIS
Johanna Maria Rotinsulu
Jurusan Kehutanan Fakultas Pertanian Universitas Palangka Raya
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Medicine & Pharmacology Social Sciences Other

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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
Model Pertumbuhan Rasional Tanaman Balangeran (Shorea balangeran Korth. Burck) di Lahan Rawa Gambut Kalimantan Tengah : Rational Growth Model of Balangeran Plants (Shorea balangeran Korth. Burck) in Peat Swamp Lands of Central Kalimantan Wahyudi, Wahyudi; Poerwadi, Petrus; Sudyana, I Nyoman; Rotinsulu, Johanna Maria
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.v19i2.17032

Abstract

The balangeran tree (Shorea balangeran Korth. Burck) is a commercial species that grows well in peat swamps. Plant growth can be described through mathematical equations.  The research aims to determine the most appropriate harvest time for balangeran plants. The model was then tested for validation, accuracy and coefficient of determination. The results of the research show that the diameter growth model for balangeran plants is namely: y = - 6.94 + 7.26 x / (1+ 0.48 x + (-0.01) x2) with a coefficient of determination of  80%, The equation is valid and quite accurate.  Based on this equation, the harvest time for balangeran plants can be determined, namely 29 years, when the average diameter of balangeran plants reaches 30.97 cm.
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.
Komposisi Vegetasi, Keanekaragaman Jenis, Dan Pola Dispersi Tumbuhan Langka Pada Kawasan Laboratorium Alam Lahan Gambut Universitas Palangka Raya: The composition of vegetation, species diversity, and dispersion patterns of rare plants in the Natural Peatland Laboratory Area of the University of Palangka Raya Setiarno, Setiarno; Nababan, Suzet Rotua Tasya; Hidayat, Nisfiatul; Rotinsulu, Johanna Maria; Junaedi, Ajun
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.v20i1.20219

Abstract

This research aims to describe and analyze species composition, species diversity, and dispersion patterns of rare plants, particularly those classified as critically endangered, in the Natural Laboratory of Peatland Palangka Raya University. Vegetation data collection was conducted using the quadrat plot technique based on a purposive systematic sampling. The data in the research plots were analyzed using Microsoft Excel, referring to the Important Value Index (IVI), species dominance index, diversity index, evenness index, and dispersion index. This research identified 47 types of plants (the total number of plants at the seedling, sapling, pole, and tree levels) categorized into 38 genera and 27 families. There were rare plants fall into critically endangered or endangered, namely ramin (Gonystylus bancanus) and nyatoh (Palaquium bintuluense). Nyatoh (Palaquium bintuluense), jambu-jambu (Eugenia spp.), and mangkinang (Elaeocarpus stipularis BI.) were almost always among the top five dominant species from the seedling stage to the tree stage at various peat thickness levels, but there was no concentration of species dominance in the plot. The majority of the species diversity index values (Shannon-Wiener) in the plots were classified as high (H’>3), indicating that the forest ecosystem conditions at the location are relatively stable. The evenness index of species in all plant communities and peat thickness levels fell into almost uniform abundance category (E = 0.76 – 0.95). The dispersion pattern of the population of critically endangered rare plants, such as Gonystylus bancanus (Mig.) and Palquium bintulense, at various peat thickness levels was clustered. In terms of growth stages, the population of Palquium bintulense was entirely clustered, while that of Gonystylus bancanus (Mig.) was only clustered at the sapling stage, but at the seedling and pole stages, it had random pattern.
Pembuatan Bee Polen Dalam Upaya Pengembangan Usaha Lebah Kelulut (Trigona sp) Di Hutan Kampus Universitas Palangka Raya : Production of Bee Pollen in an Effort to Develop The Kelulut Bee (Trigona sp) Business in The Foresto of The Palangka Raya University Campus Nuwa, Nuwa; Rotinsulu, Johanna Maria; Triyadi, Antonius
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.v20i1.21996

Abstract

Trigona spp. is a species of bee that has a unique characteristic: it does not have a stinger, making it easy to cultivate. This type of bee is widely cultivated in Indonesia. The cultivation of Kelulut honey bees can provide direct benefits through the utilization of products produced by honey bees, such as honey, royal jelly, bee pollen, wax, propolis, and bee venom. Additionally, honeybee farming can provide indirect benefits related to forest resource conservation and increased crop productivity through the mutually beneficial symbiosis between plants and honeybees, as honeybees aid in the pollination of plant flowers while foraging for food. My Bee Kelulut is a partner in this community service activity, which involves the cultivation of Trigona bees, a type of stingless bee, that has been carried out since 2017 by several students from the Forestry Department of the Faculty of Agriculture at the University of Palangka Raya at the Campus Forest Seedling Nursery. The implementation of the Community Entrepreneurship Mentor Program (PDPWM) has resulted in a new product, My Bee Kelulut Bee Pollen, packaged in bottles and ready for market
RIAP PERTUMBUHAN BALANGERAN, MERANTI MERAH DAN JELUTUNG RAWA DI HUTAN KAMPUS UNIVERSITAS PALANGKA RAYA: Balangeran, Jelutung rawa, Meranti merah, Riap Pertumbuhan, UPR Rotinsulu, Johanna Maria
TROPICAL WETLAND JOURNAL Vol 9 No 2 (2023): Wetland Agricultural Issues
Publisher : Postgraduate Program - Lambung Mangkurat University (ULM Press Academic)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/twj.v9i2.122

Abstract

Pengelolaan lahan gambut secara Lestari keberhasilannya dapat ditentukan dengan pemilihan jenis yang tepat dari aspek teknis, sosial, ekonomi, dan lingkungan. Kelestarian hutan menjadi semakin penting ketika kebutuhan kayu terus meningkat, sedangkan kelestarian bahan baku baik kuantitas maupun kualitasnya semakin menurun seperti gambaran kondisi hutan di Indonesia pada saat ini. Penelitian bertujuan untuk mengetahui riap diameter, riap tinggi dan riap volume Balangeran, Jelutung Rawa Miq dan Meranti Merah, dilakukan di Hutan Kampus Universitas Palangka Raya. Metode pengumpulan data yaitu dilakukan dengan membuat petak ukur di masing-masing plot tanaman dan menentukan sampel secara sengaja Hasil penelitian riap rata-rata tahunan diameter, tinggi dan volume untuk tanaman Balangeran (1,22 cm; 0,99m; 0,007m3), Maranti Merah (1,27 cm; 0,77m; 0,004m3) dan Jelutung Rawa (1,45 cm; 0,62m; 0,000m3). Balangeran dan Meranti Merah lebih tinggi pertumbuhannya dari pada Jelutung Rawa, disebabkan oleh jarak tanam, dan kurangnya Tindakan pemeliharaan. Dari penelitian ini disimpulkan riap ata-rata tahunan diameter dan tinggi untuk jenis tanaman di Hutan Kampus UPR cukup optimal, sehingga perlu dilanjutkan pengukurannya sampai mencapai daur optimal produksi.
Co-Authors Ajun Junaedi Bambang Guritno Bambang Guritno Benie Agusti Kaharap Didik Suprayogo Didik Suprayogo Gaman, Sampang Hendra Toni Hidayat, Nisfiatul Hiklen Pawer Sihotang I.Y. Hutahean Jemi, Renhart Junaedi, Ajun Klaudia Merinurdianto Kurniatun Hairiah Margareti Maria Ulpah Muhammad Abshar Noer Ramadhan Nababan, Suzet Rotua Tanya Nababan, Suzet Rotua Tasya Nuwa Nuwa Nuwa, Nuwa Patricia Erosa Putir Pebrianus Penyang, Penyang Penyang, Penyang Petrus Poerwadi Prida Raden Mas Sukarna, Raden Mas Reni Rahmawati Riska Yulandari Robby Octavianus Rolly Ronaldo Antonio Kevin Setiarno Setiarno Setiarno Setiarno, Setiarno Siti Rahmi Auliya Sosilawaty Sosilawaty Sudyana, I Nyoman Triska Br Sembiring Triyadi, Antonius Wahyudi Wahyudi Wandani Paramitha Fatiha Arbin Yanarita Yanarita Yanarita Yanuari Telaumbanua