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All Journal MAKILA: Jurnal Penelitian Kehutanan Journal of Agri-Food Science and Technology (JAFoST) CELEBES Agricultural Journal of Geospatial Science and Technology Outline Journal of Community Development
Rafii Nur Fauzan, Muhammad Rafii
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Engineering Environmental Science Social Sciences

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Exploration of Plant Disturbing Organisms (PDOs) in Trembesi (Samanea saman) Seedlings in Tectona Bukit Soeharto Seedlings Rucmana Saud, Oshlifin; Syarifudin, Achmad; Rafii Nur Fauzan, Muhammad Rafii; Nugroho, Andi; Sri Utami, Widia
CELEBES Agricultural Vol. 6 No. 1 (2025): CELEBES Agricultural
Publisher : Faculty of Agriculture, Tompotika Luwuk University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52045/jca.v6i1.995

Abstract

The seedling phase is a critical stage in plant development, where the presence of plant-disturbing organisms (PDOs) can significantly reduce seedling quality and viability, particularly in rehabilitation species such as Samanea saman (Trembesi). This study aimed to analyze the intensity of pest and disease attacks, identify the types of PDOs involved, and describe the symptoms and signs of infestation observed in S. saman seedlings at the Tectona Nursery, KHDTK Bukit Soeharto, East Kalimantan. A simple random sampling method was applied to select 50 seedlings from a total population of 1,000 four-month-old individuals. Data collection was conducted through direct field observation of physical plant conditions, severity scoring, and documentation of symptoms and signs of biotic attack. The results showed that all sampled seedlings were affected, with an infestation intensity reaching 65.2%, classified as heavily infested. The observed symptoms included defoliation, foliar tissue loss (skeletonizing), leaf spots, leaf blight, and stem boring. Identified signs of attack included larvae from the order Lepidoptera and  mealybug (Pseudococcidae) and aphids, which are suspected to be the primary agents of tissue damage. These findings underscore the importance of monitoring pest and disease populations and implementing ecologically based Integrated Pest Management (IPM) strategies tailored to the nursery microclimate. Technical training and coordinated IPM implementation are essential to enhance seedling resilience and support the success of tropical forest rehabilitation.
Pendugaan Cadangan Karbon Dengan Citra Sentinel-2B dan Terrestrial Laser Scanner Di Kawasan Hutan Dengan Tujuan Khusus (KHDTK) Pendidikan dan Pelatihan Kehutanan Fakultas Kehutanan Universitas Mulawarman Fauzan, Muhammad Rafii Nur; Sulistioadi, Yohanes Budi; Suhardiman, Ali
Journal of Geospatial Science and Technology Vol 1 No 1 (2023): Journal of Geospatial Science and Technology
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jgst.v1i1.8918

Abstract

Pengukuran karbon atas permukaan pada skala luas membutuhkan waktu dan biaya yang besar. Pemanfaatan penginderaan jauh dengan menggunakan Indeks Vegetasi Citra Sentinel-2B yang dihubungkan dengan pengukuran lapangan dan Terrestrial Laser Scanner (TLS) diharapkan dapat meningkatkan efisiensi pengukuran karbon. Penelitian ini bertujuan untuk menghitung karbon tegakan hutan menggunakan TLS dan pengukuran lapangan serta menghubungkan dengan indeks vegetasi. Penelitian ini dilakukan dengan mentransformasikan indeks vegetasi Transformed Vegetation Index (TVI), Normalized Difference Vegetation Index (NDVI), Simple Ratio (SR) dari citra sentinel 2B dan menghubungkannya dengan pengukuran lapangan dan TLS. Hasil perhitungan karbon pada tegakan hutan menggunakan TLS didapatkan rata-rata karbon sebesar 151.35 ton/Ha sedangkan pada pengukuran lapangan didapatkan karbon sebesar 149.81 ton/Ha dan secara statistik tidak terjadi perbedaan dari kedua pengukuran tersebut. Hubungan antara indeks vegetasi dengan pengukuran lapangan diperoleh nilai korelasi terbaik TVI dengan Koefisien regresi (r) = 0.784 dan Koefisien Determinasi (R2) = 0.524. Hubungan antara indeks vegetasi dengan pengukuran TLS diperoleh nilai korelasi terbaik TVI dengan (r) = 0.759 dan koefisien determinasi (R2) = 0.577. Measurement of forest carbon on the ground in a large scale is time-consuming and expensive. This research utilized remote sensing with Sentinel-2B image through its Vegetation Index and related those values with those obtained from field measurements and Terrestrial Laser Scanner (TLS). This study specifically compares the forest stand carbon value using TLS and field measurements and link it to the vegetation index. This study transforms the vegetation indices, i.e.: Transformed Vegetation Index (TVI), Normalized Difference Vegetation Index (NDVI) and Simple Ratio (SR) from Sentinel-2B imagery and relates them with field measurements and TLS. The calculation of carbon in forest stands using TLS revealed an average carbon of 151.35 ton/Ha. In contrast, in the field measurements, carbon was measured at 149.81 ton/Ha, and statistically, there was no difference between these two measurements. The relationship between the vegetation index and field measurements showed the best coefficient of correlation of TVI with (r) = 0.784 and (R2) = 0.524. The relationship between the vegetation index and TLS measurements showed the best coefficient of correlation of TVI with (r) = 0.759 and the coefficient of determination (R2) = 0.577.
Training on Silage Making for Farm Feed (Dairy Cows) with Forestry Plants Indigofera zollingeriana Widia Sri Utami; Muhammad Rafii Nur Fauzan; Letus Sepsamli; Hengky Sipayung
Outline Journal of Community Development Vol. 2 No. 3: March 2025
Publisher : Outline Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61730/vcpnnq13

Abstract

Farmers often have difficulty obtaining fresh forage feed to improve animal health and productivity. The problem of animal feed is one of the successes of farmers. Erratic seasonal changes cause difficulties in providing forage availability. One way to feed dairy cows is to utilize forestry plants, namely Indigofera zollingeriana, which is resistant to environmental conditions for growth and increase the growth of dairy cows with the practice of making probiotics and silage. Indigofera zollingeriana has better content for dairy cows than grass. The aim is to increase community knowledge and skills in managing animal feed in an independent and sustainable way. The method was to provide socialization and practice then evaluated with a questionnaire with 10 questions. There were 20 participants from one farmer group. The results of this activity are that the community understands very well the material and practice, which is an average of 84.38%. Participants were dominated by men as many as 15 people while the age range that dominated was age> 50 years as many as 11 people. The gender and age of participants affect the success of increasing the growth of dairy cows.
Evaluation of Antioxidant Activity in Traditional Indonesian Herbal Medicine (Jamu) Using ABTS and DPPH Testing Methods Apriyadi, Rimbawan; Sari, Kartika; Rachmawati, Maulida; Fauzan, Muhammad Rafii Nur; Rohmah, Miftakhur
Journal of Agri-Food Science and Technology Vol. 6 No. 4 (2025): December
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/jafost.v6i4.13005

Abstract

Herbal medicines are widely consumed as natural antioxidants to prevent oxidative stress-related diseases. Accurate assessment of antioxidant activity is essential, yet different methods may yield varying results. This study contributed to compare the antioxidant activities of ten commercial herbal medicines using ABTS (2,2’-azinobis- (3-ethylbenzothiazoline-6-sulfonic acid) and DPPH (2,2-diphenyl-1picrylhydrazyl) assays and evaluate the correlation between both methods. Ten herbal formulations were collected from local producers in Samarinda, Indonesia. Each product was mixed with low-fat milk (1:10 w/v) to enhance bio-accessibility and extracted via sonication and centrifugation. Antioxidant activity was analyzed using ABTS and DPPH radical scavenging assays. Percentage inhibition and IC₅₀ values were calculated. Statistical analysis was performed using GraphPad Prism 9.5.0 with Pearson correlation at a 95% confidence level. ABTS inhibition ranged from 10.54% to 72.73%, while DPPH ranged from 8.89% to 49.03%. IC₅₀ values were lower in ABTS (13.51–105.36 µg/mL) than in DPPH (20.11–165.50 µg/mL). A moderate positive correlation (r=0.5390) between inhibition results was observed but was not statistically significant (p=0.1079). Among all samples, the herbal formulation containing turmeric, betel leaf, areca nut, and manjakani exhibited the highest antioxidant activity with 72.73% inhibition (ABTS) and an IC₅₀ of 13.51 µg/mL. The differing sensitivities of ABTS and DPPH assays suggest that both methods should be used complementarily to obtain a comprehensive antioxidant profile of herbal products.
Dinamika Perubahan Tutupan Lahan dan Emisi Karbon dari Deforestasi dan Degradasi Hutan di Kabupaten Kutai Timur Tahun 2019 - 2024 Fauzan, Muhammad Rafii Nur; Suhardiman, Ali; Naufalianto, Ikhsan Fiqra; Syarifudin, Achmad; Nugroho, Andi; Saud, Oshlifin Ruchmana
MAKILA Vol 19 No 2 (2025): Makila : Jurnal Penelitian Kehutanan
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/makila.v19i2.22634

Abstract

This study aims to analyze land cover changes and estimate carbon emissions resulting from deforestation and forest degradation in Kutai Timur Regency during the period of 2019–2024. The analysis was conducted using land cover vector data from the Ministry of Environment and Forestry, which was analyzed with the pairwise comparison method and Geographic Information System (GIS). Carbon emissions were calculated based on Tier 2 IPCC with emission factors for each land cover class.The results of the study show that deforestation is the main contributor to carbon emissions, with the highest increase in emissions during 2023–2024, reaching 9,702,628 tons CO₂e. The decrease in emissions during 2020–2022 aligns with the implementation of the moratorium policy, but an increasing trend in emissions was observed again in 2022–2024, indicating that pressure on forest land remains high. Natural regeneration of secondary forests occurred, but its contribution was not sufficient to offset the loss from deforestation. Spatial patterns show that the largest forest conversion took place in agricultural areas, mining, open land, and scrublands. These findings emphasize the importance of consistent jurisdiction-based forest management policies to achieve the FOLU Net Sink 2030 target and support climate change mitigation.
Co-Authors Achmad Syarifudin, Achmad Andi Nugroho, Andi Apriyadi, Rimbawan Hengky Sipayung Kartika Sari Maulida Rachmawati Miftakhur Rohmah, Miftakhur Naufalianto, Ikhsan Fiqra Rucmana Saud, Oshlifin Saud, Oshlifin Ruchmana Sepsamli, Letus Suhardiman, Ali Widia Sri Utami