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All Journal DIDAKTIKA: Jurnal Pendidikan Sekolah Dasar Journal of Degraded and Mining Lands Management Jurnal Belantara Journal of Physics and Its Applications JMIE (Journal of Madrasah Ibtidaiyah Education) Jurnal Teknik Menara Perkebunan Journal of Sylva Indonesiana Jurnal Review Pendidikan Dasar : Jurnal Kajian Pendidikan dan Hasil Penelitian Jurnal Sylva Lestari
Hendra Prasetia
Universitas Negeri Yogyakarta
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences

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DIVERSITY OF AMPHIBIANS IN TROPICAL PEATLAND ECOSYSTEM: CASE IN BUFFER VILLAGE AROUND CONSERVATION AREA Iswandaru, Dian; Hasballah, Bayu Ginanjar; Wulandari, Christine; N., Novriyanti; Pangestu, Pandu Galang; Prasetia, Hendra
Jurnal Belantara Vol 8 No 1 (2025)
Publisher : Forestry Study Program University Of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbl.v8i1.1112

Abstract

Peatlands are vulnerable to fire, causing ecological damage that threatens biodiversity, one of which is amphibians. The nature of amphibians which are sensitive to environmental changes can be used as a bioindicator of the quality of a disturbed environment, including in buffer villages around conservation areas. This research aims to analyze the diversity of amphibians and their relationship with temperature and air humidity. The method used is Visual Encounter Survey (VES) in two types of habitats, namely oil palm plantations and swamps. Data analysis used the Shannon-Wiener species diversity index, the Pielou species evenness index, and the Pearson correlation test. The research results found 6 species of amphibians, namely Hylarana erythraea, Hylarana nicobariensis, Fejervarya limnocharis, Fejervarya cancrivora, Duttaphrynus melanustictus, and Hylarana baramica. The diversity index (H') in oil palm plantations and swamps is H'=1.46 and H'=1.10 in the medium category. This shows that ecologically, the conditions of the habitat types of oil palm plantations and swamps in the buffer villages around the Orang Kayo Hitam Forest Park after land burning can support amphibian life. Key words: Amphibians, conservation area, diversity, tropical peatland.
Field Evaluation of Biochar Application on the Early Growth of Falcataria moluccana: Effects of Pyrolysis Temperatures and Biochar Application Rates Wijaya, Bangun Adi; Riniarti, Melya; Hidayat, Wahyu; Prasetia, Hendra; Yoo, Jiho; Park, Byung Bae
Jurnal Sylva Lestari Vol. 13 No. 1 (2025): January
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v13i1.1134

Abstract

Faltacaria moluccana at its early plantation, is devastated by heat and water stress due to current global climate change. Production forests in Indonesia suggested to use biochar to enhance the durability of early growth F. moluccana in the field. Empty fruit bunches (EFB), a gigantic abundant waste material in Indonesia, pose its potential as biochar feedstock. This study aims to evaluate the effects of EFB biochar on the growth of F. moluccana for one year in a field setting. The experiment used two biochar application rates (25 and 50 tons/ha) and biochar produced at two pyrolysis temperatures (400°C and 600°C). Climatic factors (rainfall and average temperature) were monitored to assess how biochar interacted with field conditions to influence the growth of F. moluccana. EFB biochar increased height and diameter increment by up to 25% and 42%, respectively, compared to control after one year. While pyrolysis temperatures show no impact on growth, biochar application rates of 25 and 50 tons/ha significantly boost diameter increments by 36% and 42%, respectively, compared to controls, without affecting height. Biochar also improves monthly growth increments under water and heat stress. EFB biochar optimizes growth under current climate conditions in Indonesia and mitigates the negative effects of extreme temperature fluctuations. Keywords: biochar, early plant growth, empty fruit bunch, Faltacaria moluccana, field experiment
The influence of pyrolysis temperature and dosage of shorea wood biochar produced on soil properties and sengon (Falcataria moluccana) seedling biomass Riniarti, Melya; Hidayat, Wahyu; Prasetia, Hendra; Wijaya, Bangun Adi
Menara Perkebunan Vol. 93 No. 1 (2025): 93(1), 2025
Publisher : INDONESIAN OIL PALM RESEARCH INSTITUTE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iribb.jur.mp.v93i1.611

Abstract

This study explores the effects of pyrolysis temperature of shorea wood biochar and its doses on the soil properties and biomass of Falcataria moluccana seedlings. The focus is optimizing pyrolysis temperatures (400°C and 600°C) and biochar doses (0%, 25%, and 50%) to enhance soil fertility and seedling biomass. Both pyrolysis temperature and biochar dose are critical factors that influence the soil properties, directly affecting its effectiveness as a soil amendment. The research was conducted as a controlled greenhouse experiment over 120 days; each treatment was replicated 15 times. We observed several soil chemical properties, including pH, cation exchange capacity (CEC), organic carbon (C-organic), total nitrogen (N-total), and total phosphorus (P-total). The growth parameters assessed included above ground biomass (AGB), below ground biomass (BGB), total biomass (TB), and root to shoot ratio (R:S). Data analysis involved one-way and two-way ANOVA. Results indicated that soil properties, particularly cation exchange capacity (CEC) and organic carbon content, were improved, thereby enhancing soil fertility. However, ANOVA indicated no statistically significant differences across treatments. Biochar significantly enhanced above-ground and below-ground biomass (AGB and BGB). Nevertheless, both pyrolysis temperature and biochar dose independently influenced biomass accumulation in F. moluccana seedlings. The highest increases were observed in the treatment with the highest pyrolysis temperature (600ᵒC) and the highest dose (50%), which led to an 85% increase in AGB and a 60% increase in BGB compared to the control. Based on the study, Shorea wood biochar, particularly when used at 600°C and 50% dose, significantly improves soil fertility and seedling growth, providing a promising approach for developing F. moluccana plantations.
Heavy metals in water and sediment of Way Ratai River due to small-scale gold mining activities in Pesawaran Regency, Lampung Province (Part II: zinc, copper, cadmium, iron, and manganese) Istighfara, Vedelya; Dermiyati, Dermiyati; Rinawati, Rinawati; Prasetia, Hendra; Fasya, Muhammad Rizki Firdaus
Journal of Degraded and Mining Lands Management Vol. 12 No. 5 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2025.125.8705

Abstract

Heavy-metal contamination in river systems poses an escalating threat to aquatic ecosystems and public health. This study provides the first integrated geospatial assessment of zinc (Zn), copper (Cu), cadmium (Cd), iron (Fe), and manganese (Mn) in water and sediment of the Way Ratai River, an area increasingly impacted by artisanal gold processing. Inductively coupled plasma optical emission spectroscopy (ICP-OES) and X-ray fluorescence were used to evaluate water and sediment samples that were gathered at five key locations. Spatial interpolation via ArcGIS with an inverse distance weighting algorithm identified contamination hotspots. In river water, Zn averaged 0.05 ppm, Mn 0.009 ppm, and Fe 0.075 ppm, while Cd and Cu were below detection limits. Sediment concentrations were markedly elevated: Zn 702.62 ppm, Mn 685.60 ppm, Fe 2,954.72 ppm, and Cu 253.84 ppm. All detected metals exceeded regional background thresholds, particularly near gold-processing effluent zones, indicating significant geochemical accumulation. These findings underscore the urgent need for stringent waste-management protocols—such as coagulation and adsorption systems—to mitigate heavy-metal release and protect downstream ecosystems and human communities. This research closes a critical data gap and offers a spatially resolved framework for monitoring and remediation strategies in mining-impacted watersheds.
Electrokinetic Remediation Treatment of Chromium (Cr) Concentration and Distribution in Soil from the PT Semen Baturaja Cement Factory Environment Alfajrin, Achmad Chalid Afif; Komariah, Rahma Nur; Prasetia, Hendra; Halid, Muhammad Akmal; Aisyara, Arien; Simatupang, Lamtongam; Ghifari, Hamzah Daffa; Widiatama, Angga Jati; Arham, La Ode; Mukti, Aqil Chandra; Ningsih, Dina Widya; Ferdinan, Muhammad Rizky
Journal of Physics and Its Applications Vol 7, No 3 (2025): August 2025
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v7i3.25377

Abstract

PT Semen Baturaja, a cement production company in South Sumatra, Indonesia, holds a Mining Business License of 103.4 hectares, of which 64.23% was reclaimed during 2017–2021. However, the revegetation success rate remains low at only 9%, potentially due to excessive soil chromium (Cr) accumulation. This study investigates the application of electrokinetic remediation to reduce Cr concentrations and improve soil conditions for revegetation. The experiment was conducted on soil samples collected from Disposal Area 4 of PT Semen Baturaja, using a laboratory-scale setup with copper electrodes powered by a 20 V direct current, applied continuously for 48 hours. The results showed that Cr ions tend to migrate toward the anode due to electromigration, while redox reactions influence Cr distribution over time. The highest treatment efficiency was observed in segment one (11.123%), and the lowest in segment three (1.651%). These findings demonstrate the potential of electrokinetic remediation as a viable method for enhancing revegetation in Cr-contaminated post-mining soils.
Co-Authors Ainin Niswati Aisyara, Arien Alfajrin, Achmad Chalid Afif Arham, La Ode Christine Wulandari Christine Wulandari Dermiyati, Dermiyati Dian Iswandaru Eva Yunita Falah Rizkasumarta Fasya, Muhammad Rizki Firdaus Fathurrohman Fathurrohman Ferdinan, Muhammad Rizky Ghifari, Hamzah Daffa Halid, Muhammad Akmal Hasballah, Bayu Ginanjar Irwan Sukri Banuwa Istighfara, Vedelya Iswandaru, Dian Jayawarsa, A.A. Ketut Komariah, Rahma Nur Kus Eddy Sartono Maulasih, Resti Melya Riniarti Mukti, Aqil Chandra N., Novriyanti Ningsih, Dina Widya Novriyanti Novriyanti Pangestu, Pandu Galang Park, Byung Bae Putra, Heriansyah Rinawati Rinawati Simatupang, Lamtongam Udin Hasanudin Wahyu Hidayat Widiatama, Angga Jati Wijaya, Bangun Adi Wuri Wuryandani Yoannisa Egeustin Yoo, Jiho Yunita, Repha Sera