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All Journal ULIN: Jurnal Hutan Tropis Jurnal Hutan Tropika Jurnal Wana Tropika Proceedings Series on Physical & Formal Sciences Empowerment: Jurnal Pengabdian Masyarakat Jurnal Wana Tropika
Suwadji, Siman
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SIFAT WOOD PELLET DARI LIMBAH KAYU JATI Suwadji, Siman; Pebriana, Haris
Jurnal Wana Tropika Vol 8 No 2 (2018)
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Istilah “energi baru dan terbarukan” disebut sebagai solusi dari ketergantungan akan sumber daya alam yang tidak dapat diperbarui dalam krisis energi. Wood pellet merupakan salah satu bentuk produk yang dapat dikembangkan sebagai alternatif sumber energi baru. Wood pellet biasanya memiliki diameter antara 3 - 12 mm dan panjang bervariasi antara 6 – 25 mm. Tujuan penelitian ini adalah untuk mengetahui pengaruh peningkatan ukuran serbuk terhadap kualitas wood pellet serta mengetahui pengaruh pemakaian perekat tapioka dan sagu terhadap kualitas wood pellet. Manfaat penelitian ini diharapkan dapat meningkatkan nilai tambah limbah kayu jati dan memberi informasi ilmiah baru dalam pengembangan bahan baku teknologi pelleting mengacu pada Standar Indonesia, Austria, Jerman dan Swedia.Penelitian ini menggunakan bahan baku limbah serbuk gergajian kayu jati (Tectona grandis). Rancangan penelitian yang digunakan adalah Rancangan Acak Lengkap dengan 2 faktor perlakuan yaitu ukuran serbuk dan jenis jenis perekat. Parameter yang diamati dalam penelitian adalah rendemen, kadar air, kerapatan, berat jenis, kadar abu, karbon terikat dan nilai kalor wood pellet. Hasil penelitian menunjukkan jenis perekat dan ukuran serbuk tidak berpengaruh nyata terhadap nilai kadar air, kadar abu, karbon terikat, dan nilai kalor begitu juga dengan interaksi kedua faktor tersebut. Namun, jenis perekat dan ukuran serbuk berpengaruh sangat nyata terhadap nilai kerapatan dan berat jenis. Faktor ukuran serbuk serta interaksi kedua faktor berpengaruh nyata terhadap nilai rendemen. Penggunaan perekat tapioka memiliki kerapatan wood pellet lebih tinggi daripada perekat sagu yaitu 0,842 g/cm3 dan 0.803 g/cm3, serta penggunaan perekat tapioka juga memiliki berat jenis wood pellet lebih tinggi daripada perekat sagu yaitu 0,762 dan 0,725. Ukuran serbuk yang semakin halus memberikan kerapatan dan berat jenis Wood Pellet yang semakin tinggi dengan nilai sebesar 0,852 g/cm3 dan 0,769. Interaksi jenis perekat dan ukuran serbuk berpengaruh nyata terhadap nilai rendemen yaitu 41,578 – 48,667 %. Secara umum, hasil penelitian ini lebih banyak diterima oleh standar Indonesia dan Jerman dibandingkan standar Austria dan Swedia. Hasil penelitian terbaik yaitu wood pellet ukuran 40-60 mesh dengan menggunakan perekat tapioka dengan nilai kalor 4399,638 kal/g. Kata kunci: Energi, Jati (Tectona grandis), Wood Pelet, Sagu, Tapioka
Pengaruh Indole Butyric Acid (IBA) dan Naphthalene Acetic Acid (NAA) terhadap pertumbuhan stek pucuk Corymbia sp. Yuslinawari, Yuslinawari; Suwadji, Siman; Calvin, Daniellie
ULIN: Jurnal Hutan Tropis Vol 8, No 2 (2024)
Publisher : Fakultas Kehutanan Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32522/ujht.v8i2.14928

Abstract

Penggunaan zat pengatur tumbuh Indole Butyric Acid dianggap belum menghasilkan pengadaan stek yang maksimal. Penelitian ini diperlukan agar mendapatkan hasil jenis zat pengatur tumbuh yang tepat dan terarah sehingga dapat meningkatkan mutu stek Corymbia sp. yang sesuai dengan standar dan kuantitas. Penelitian ini bertujuan mengetahui pengaruh berbagai zat pengatur tumbuh campuran IBA dan Naphthalene Acetic Acid terhadap pertumbuhan akar stek Corymbia sp. Clone IND 125. Penelitian eksperimen yang digunakan menggunakan percobaan faktor tunggal dengan Rancangan Acak Lengkap. Parameter yang diamati antara lain: tinggi stek, persentase stek hidup, persentase stek berakar, panjang akar, jumlah akar, dan jumlah daun. Hasil penelitian menunjukkan bahwa penggunaan campuran ZPT terbukti berpengaruh nyata terhadap parameter daya bertahan hidup serta kemampuan berakar. Perlakuan pemberian kombinasi ZPT IBA 3000 ppm + NAA 2000 ppm merupakan perlakuan yang optimal dengan persentase kemampuan berakar sebesar 38,51%.
Analisis Tingkat Erosi Menggunakan Metode USLE di Kapanewon Panggang Kabupaten Gunungkidul Daerah Istimewa Yogyakarta Atmojo, Surya; Suwadji, Siman
Jurnal Wana Tropika Vol 14 No 2 (2024): November
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55180/jwt.v14i2.1635

Abstract

One of the causes of critical land is erosion; the greater the intensity of erosion, the more critical the land becomes. The distribution of erosion predictions is influenced by variables such as rainfall erosivity, soil erodibility, slope length and steepness, ground cover vegetation, land use, and land conservation. One of the critical lands is located in Kapanewon Panggang, Gunungkidul Regency, Special Region of Yogyakarta, covering an area of 9130.01 hectares, which consists of six villages: Giriharjo, Girisuko, Giriwungu, Girimulyo, Girikarto, and Girisekar. The purpose of this study is to determine the erosion rate in Kapanewon Panggang, to assess the level of erosion hazard in Kapanewon Panggang, and to formulate a land management concept based on actual land use conditions with erosion criticality parameters in Kapanewon Panggang, Gunungkidul Regency, Special Region of Yogyakarta. The method used is the USLE (Universal Soil Loss Equation). USLE is an erosion model designed to predict long-term erosion from sheet or rill erosion under specific conditions. USLE is used on both agricultural and non-agricultural lands. The results show that the erosion hazard levels in Kapanewon Panggang are categorized as very light (1184.28 hectares), light (1074.65 hectares), moderate (1831.70 hectares), severe (2411.01 hectares), and very severe (2628.38 hectares). The factors that most influence the magnitude of erosion are land use, slope length, and steepness. The land management concept to minimize erosion can be implemented based on land cover, namely in residential areas where water infiltration areas are needed, in savanna land use where additional vegetation and ground cover plants are necessary, and based on slope length and steepness, mechanical conservation by constructing bench terraces and stone bunds should be applied.
Peningkatan Kualitas Ketahanan Air Kayu Lapis dengan Perlakuan Pelapisan Permukaan Sushardi; Woesono, Hastanto Bowo; Hadi, Didik Surya; Suwadji, Siman; Damayanty, Dhewy; Wardana, Wisnu
Proceedings Series on Physical & Formal Sciences Vol. 8 (2025): Prosiding Seminar Nasional Fakultas Pertanian dan Perikanan
Publisher : UM Purwokerto Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/pspfs.v8i.1492

Abstract

Kayu lapis memiliki banyak keunggulan, seperti kekuatan struktural yang baik dan harga yang relatif terjangkau. Namun, salah satu kelemahan utamanya adalah kemampuan menyerap air yang dapat menyebabkan pengembangan ketebalan yang tinggi. Salah satu solusi untuk mengatasi permasalahan tersebut dengan perlakuan pelapisan permukaan. Penelitian bertujuan untuk mengetahui peningkatan kualitas kayu lapis dengan perlakuan pelapisan permukaan terhadap ketahanan air. Penelitian menggunakan rancangan acak lenkap dengan uji lanjut Tukey. Faktor yang digunakan terdiri kayu lapis 3, 5 dan 7 lapis dan perlakuan pelapisan permukaan dengan cat. Parameter yang diamati adalah kadar air, kerapatan, absorbsi dan pengembangan tebal. Hasil penelitian menunjukkan kayu lapis 3, 5 dan 7 lapis dengan perlakuan pelapisan permukaan berbeda nyata terhadap absorpsi air dan pengembangan tebal. Jenis produk dan perlakuan pelapisan permukaan pengembangan tebal yang optimal pada kayu lapis 3 lapis perlakuan pelapisan permukaan 1,45%, sedangkan absorbsi yang optimal 40,66% kayu lapis 5 lapis. Nilai rata-rata kadar air 11,24%-12,07%, kerapatan 0,35%-0,41%, absorbsi 52,14 - 84,93 % dan pengembangan tebal 2,18%-5,56%.
SIFAT WOOD PELLET DARI LIMBAH KAYU JATI Suwadji, Siman; Pebriana, Haris
Jurnal Wana Tropika Vol 8 No 2 (2018)
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Istilah “energi baru dan terbarukan” disebut sebagai solusi dari ketergantungan akan sumber daya alam yang tidak dapat diperbarui dalam krisis energi. Wood pellet merupakan salah satu bentuk produk yang dapat dikembangkan sebagai alternatif sumber energi baru. Wood pellet biasanya memiliki diameter antara 3 - 12 mm dan panjang bervariasi antara 6 – 25 mm. Tujuan penelitian ini adalah untuk mengetahui pengaruh peningkatan ukuran serbuk terhadap kualitas wood pellet serta mengetahui pengaruh pemakaian perekat tapioka dan sagu terhadap kualitas wood pellet. Manfaat penelitian ini diharapkan dapat meningkatkan nilai tambah limbah kayu jati dan memberi informasi ilmiah baru dalam pengembangan bahan baku teknologi pelleting mengacu pada Standar Indonesia, Austria, Jerman dan Swedia.Penelitian ini menggunakan bahan baku limbah serbuk gergajian kayu jati (Tectona grandis). Rancangan penelitian yang digunakan adalah Rancangan Acak Lengkap dengan 2 faktor perlakuan yaitu ukuran serbuk dan jenis jenis perekat. Parameter yang diamati dalam penelitian adalah rendemen, kadar air, kerapatan, berat jenis, kadar abu, karbon terikat dan nilai kalor wood pellet. Hasil penelitian menunjukkan jenis perekat dan ukuran serbuk tidak berpengaruh nyata terhadap nilai kadar air, kadar abu, karbon terikat, dan nilai kalor begitu juga dengan interaksi kedua faktor tersebut. Namun, jenis perekat dan ukuran serbuk berpengaruh sangat nyata terhadap nilai kerapatan dan berat jenis. Faktor ukuran serbuk serta interaksi kedua faktor berpengaruh nyata terhadap nilai rendemen. Penggunaan perekat tapioka memiliki kerapatan wood pellet lebih tinggi daripada perekat sagu yaitu 0,842 g/cm3 dan 0.803 g/cm3, serta penggunaan perekat tapioka juga memiliki berat jenis wood pellet lebih tinggi daripada perekat sagu yaitu 0,762 dan 0,725. Ukuran serbuk yang semakin halus memberikan kerapatan dan berat jenis Wood Pellet yang semakin tinggi dengan nilai sebesar 0,852 g/cm3 dan 0,769. Interaksi jenis perekat dan ukuran serbuk berpengaruh nyata terhadap nilai rendemen yaitu 41,578 – 48,667 %. Secara umum, hasil penelitian ini lebih banyak diterima oleh standar Indonesia dan Jerman dibandingkan standar Austria dan Swedia. Hasil penelitian terbaik yaitu wood pellet ukuran 40-60 mesh dengan menggunakan perekat tapioka dengan nilai kalor 4399,638 kal/g. Kata kunci: Energi, Jati (Tectona grandis), Wood Pelet, Sagu, Tapioka
Evaluasi Pertumbuhan Tanaman Eukaliptus (Eucalyptus sp) Pada Variasi Umur dan Unit Pengelolaan Tanah yang Berbeda Wahyudiono, Sugeng; Falah, M. Darul; Suwadji, Siman; Aeng, Katharina Sari Narulita
Jurnal Wana Tropika Vol 12 No 2 (2022): November
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55180/jwt.v12i02.309

Abstract

Eucalyptus sp is a type of exotic plant that is cultivated in Riau Fiber. Particularly in terms of soil, this Eucalyptus species was developed in soil management unit B and soil management unit C. Differences in variations in plant growth in the two land management units are not known with certainty because there is no accurate information. This research was conducted at the East Teso Estate which is one of the forest management units of Riau Fiber which included measuring tree height with variations in age of 6 months, 12 months and 18 months, as well as tree diameter and calculating the percentage of single trees with variations in age of 12 months and 18 months. in the land management unit B and soil management unit C which were tested using the t-test at a test level of 5%. The results showed that height growth had a significantly different effect on the two soil management units, namely 4.39 m in soil management unit B and 3.62 m in soil management unit C at 12 months of age and 6.43 m in soil management unit B and 5.87 m in soil management unit C at 18 months old. As for plant height at 6 months, diameter and percent of single trees aged 12 months and 18 months, the results were not significantly different in soil management unit B and soil management unit C.
Study Produktivitas dan Efisiensi Penebangan Mekanis Tanaman Eucalyptus sp. Di Hutan Tanaman Industri Gaol, Santo Wibowo Lumban; Suwadji, Siman; Woesono, Hastanto Bowo
Jurnal Wana Tropika Vol 13 No 1 (2023): Mei
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55180/jwt.v13i1.509

Abstract

The use of wood harvesting equipment greatly helps the company to achieve the goals, namely: (1) speed up the process of carrying out work; (2) carrying out the kind of work that cannot be done by human labor; and (3) it is done for reasons of efficiency, limited labor, security and economic factors. Therefore, in order for the goal to be achieved, it is necessary to choose tools that are appropriate, economical and in accordance with working conditions. The selection of inappropriate tools can result in not achieving the expected goals and can cause damage to the tool itself. In the process of logging carried out at PT. RAPP on fully mechanical and semi-mechanical systems uses different logging tools. Each tool in logging activities has its own disadvantages and advantages. So it is necessary to conduct research on comparing the productivity and efficiency of logging using chainsaws and excavator attachment tree shear on Eucalyptus sp plants. Based on the results of the test analysis conducted, the average chainsaw productivity of STIHL MS 382 was 11.32 m³ / hour smaller than the productivity of excavator KOBELCO SK-130 HD with attachman tree shear Dymax 14 In " of 27.34 m³ / hour.   As for the average operational cost of the STIHL MS 382 chainsaw of Rp.  7,043/m³ smaller than excavator KOBELCO SK-130 HD with attachman tree shear Dymax 14 In" of Rp.  11.541/ m³.
Model Penduga Biomassa Hutan Mangrove Menggunakan Citra Satelit Sentinel -2A di Kabupaten Rembang Jawa Tengah Ramadhan, Ashari; Suwadji, Siman
Jurnal Wana Tropika Vol 13 No 2 (2023): November
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55180/jwt.v13i2.1018

Abstract

Mangrove forest is one of the forests that has the highest carbon storage in the tropics and is very high compared to the average carbon storage in various other forest types in the world, which contains around 1.023 Mg of carbon per hectare. This study aims to obtain a model for estimating the biomass potential of mangrove forests in Rembang Regency by utilizing Sentinel-2A Satellite imagery and making a map of the distribution of mangrove forest biomass potential through the best equation model. Sampling was done by purposive systematic sampling method. The correlation test results obtained a value of 0.640 which states that there is a strong relationship between biomass and NDVI. Biomass estimation modeling uses equation models namely Linear, Quadratic, Power, and Exponential. Model selection is done by considering several parameters such as R², RMSE, Bias, χ²-hit, SA, and SR. The selected model for estimating mangrove forest biomass potential is the quadratic model ???? = 17.4 -110.2 ???????????????? + 220 ????????????????² with an R² value of 0.474, RMSE value of 51.55, Chi-square test result of 3.46 and has the highest score value. The potential biomass distribution map generated from the selected model consists of 3 classes, namely classes < 3.7 (tons/ha), 3.7-10.5 (tons/ha), 10.5-35.7 (tons/ha). Mangrove forests in Rembang Regency have dominant biomass potential in the 10.5-35.7 (tons/ha) class.
Analisis Tingkat Erosi Menggunakan Metode USLE di Kapanewon Panggang Kabupaten Gunungkidul Daerah Istimewa Yogyakarta Atmojo, Surya; Suwadji, Siman
Jurnal Wana Tropika Vol 14 No 2 (2024): November
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55180/jwt.v14i2.1635

Abstract

One of the causes of critical land is erosion; the greater the intensity of erosion, the more critical the land becomes. The distribution of erosion predictions is influenced by variables such as rainfall erosivity, soil erodibility, slope length and steepness, ground cover vegetation, land use, and land conservation. One of the critical lands is located in Kapanewon Panggang, Gunungkidul Regency, Special Region of Yogyakarta, covering an area of 9130.01 hectares, which consists of six villages: Giriharjo, Girisuko, Giriwungu, Girimulyo, Girikarto, and Girisekar. The purpose of this study is to determine the erosion rate in Kapanewon Panggang, to assess the level of erosion hazard in Kapanewon Panggang, and to formulate a land management concept based on actual land use conditions with erosion criticality parameters in Kapanewon Panggang, Gunungkidul Regency, Special Region of Yogyakarta. The method used is the USLE (Universal Soil Loss Equation). USLE is an erosion model designed to predict long-term erosion from sheet or rill erosion under specific conditions. USLE is used on both agricultural and non-agricultural lands. The results show that the erosion hazard levels in Kapanewon Panggang are categorized as very light (1184.28 hectares), light (1074.65 hectares), moderate (1831.70 hectares), severe (2411.01 hectares), and very severe (2628.38 hectares). The factors that most influence the magnitude of erosion are land use, slope length, and steepness. The land management concept to minimize erosion can be implemented based on land cover, namely in residential areas where water infiltration areas are needed, in savanna land use where additional vegetation and ground cover plants are necessary, and based on slope length and steepness, mechanical conservation by constructing bench terraces and stone bunds should be applied.
Keanekaragaman Jenis EPT (Ephemeroptera, Plecoptera, Trichoptera) sebagai Indikator Kesehatan Sungai Opak, Daerah Istimewa Yogyakarta Saleh, Yogi Faturahman; Suwadji, Siman; Yuslinawari
Jurnal Wana Tropika Vol 15 No 1 (2025): MEI
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55180/jwt.v15i1.1999

Abstract

Macroinvertebrates from the EPT group (Ephemeroptera, Plecoptera, and Trichoptera) are known as sensitive bioindicators of aquatic pollution. This study aims to assess the ecological health of the Opak River in the Special Region of Yogyakarta using biomonitoring based on the presence and diversity of EPT taxa. Sampling was conducted at three observation sites—upstream (Leses Village), midstream (Bawuran), and downstream (Sriharjo)—using kick sampling and jabbing methods. The results showed that EPT were only found at the upstream station, represented by two families (Psychomyiidae and Polycentropodidae), while no EPT were detected at the midstream and downstream stations. Based on the Biotilik index and supporting parameters, the water quality in the upstream area was classified as moderately polluted, whereas the midstream and downstream areas were classified as heavily polluted. The decline in river quality correlates strongly with anthropogenic activities such as agriculture, livestock farming, industrial waste, and household sewage discharge. This study emphasizes the importance of river conservation and management through biological indicators to support the sustainability of freshwater ecosystems.
Co-Authors Aeng, Katharina Sari Narulita Airlangga, M Sadaad Atmojo, Surya Calvin, Daniellie Damayanty, Dhewy Falah, M. Darul Gaol, Santo Wibowo Lumban Hadi, Didik Surya Pebriana, Haris Ramadhan, Ashari Saleh, Yogi Faturahman Sugeng Wahyudiono, Sugeng Sushardi Sushardi Sushardi, Sushardi Wisnu Wardana, Wisnu Woesono, Hastanto Bowo Yuslinawari Yuslinawari, Yuslinawari