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All Journal MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Jurnal Ilmu Pertanian Indonesia Agromet Jurnal Silvikultur Tropika (JST) MEDIA KONSERVASI Jurnal Penelitian Hutan dan Konservasi Alam Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat BERITA BIOLOGI Jurnal Hutan Tropika Jurnal Risalah Kebijakan Pertanian dan Lingkungan Jurnal Pusat Inovasi Masyarakat Jurnal Sylva Lestari Jurnal Ilmu Kehutanan
Istomo .
Departemen Silvikultur, Fakultas Kehutanan Dan Lingkungan, Institut Pertanian Bogor, Jalan Ulin, Kampus IPB Darmaga
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Environmental Science Materials Science & Nanotechnology Social Sciences

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Aplikasi Ekoenzim untuk Peningkatan Pertumbuhan Tanaman pada Sistem Agroforestri Jati di Desa Sugihwaras, Magetan, Jawa Timur Istomo; Rahaju, Sri; Hartoyo, Adisti Permatasari Putri
Jurnal Pusat Inovasi Masyarakat Vol. 5 No. 2 (2023): Oktober 2023
Publisher : Direktorat Pengembangan Masyarakat Agromaritim, Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpim.5.2.168-182

Abstract

Tingginya jumlah populasi penduduk Indonesia menyebabkan meningkatnya limbah/sampah organik rumah tangga. Limbah organik tersebut mempunyai potensi untuk diolah menjadi ekoenzim yang dapat meningkatkan produktivitas tanaman. Saat ini sejumlah petani di Desa Sugihwaras, Kecamatan Maospati, Kabupaten Magetan, Jawa Timur memiliki keterbatasan dalam pemenuhan kebutuhan pupuk anorganik (NPK) untuk tanaman mereka. Tujuan dari kegiatan ini adalah memberikan pelatihan pembuatan ekoenzim, menganalisis perubahan pengetahuan mitra tentang pembuatan ekoenzim, serta menganalisis pengaruh aplikasi ekoenzim untuk peningkatan pertumbuhan tanaman pada sistem agroforestri jati (Tectona grandis). Kegiatan ini dilakukan pada Kelompok Tani Subur di Desa Sugihwaras, Kabupaten Magetan, Jawa Timur pada tahun 2022. Metode yang digunakan adalah demonstrasi pembuatan ekoenzim, pemberian pre-test dan post-test kepada 20 anggota kelompok tani, serta pengukuran secara langsung pertumbuhan diameter tanaman jati dan tinggi tanaman rumput gajah. Pelatihan pembuatan ekoenzim pada sistem agroforestri jati mampu meningkatkan pengetahuan Kelompok Tani Subur. Hal tersebut ditunjukkan oleh nilai rata-rata pre-test adalah 45,1 sedangkan nilai rata-rata post-test adalah 90,5. Berdasarkan evaluasi penilaian kegiatan pelatihan, sebanyak 74,3% anggota kelompok tani menyatakan sangat setuju bahwa pelatihan pembuatan ekoenzim sangat bermanfaat dan sesuai dengan kebutuhan kelompok tani. Berdasarkan evaluasi program, pelatihan pembuatan ekoenzim termasuk pada kategori sangat layak untuk diimplementasikan dengan nilai 94%. Pelatihan pembuatan ekoenzim kepada Kelompok Tani Subur terbukti mampu meningkatkan pengetahuan mitra, meningkatkan pertumbuhan diameter tanaman jati dan tinggi tanaman rumput gajah, serta berpotensi dalam peningkatan pendapatan masyarakat Desa Sugihwaras, Kabupaten Magetan, Jawa Timur.
Correlation between canopy density using NDVI and invasive species diversity in Gunung Dahu Research Forest Elsa Widyastuti; Istomo; Rachmat, Henti Hendalastuti
Journal of Tropical Silviculture Vol. 15 No. 02 (2024): Jurnal Silvikutur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.15.02.153-161

Abstract

Gunung Dahu Research Forest is a forest area dominated by meranti species. The presence of human activity in forest areas has the potential to bring in invasive species. The presence of invasive plant species can have negative impacts on the ecosystem. This research aims to estimate canopy density in the Gunung Dahu Research Forest using the Normalized Difference Vegetation Index and its relationship with the diversity of invasive understory species to produce appropriate management recommendations. The canopy density class map was made using a desk study and the understorey data was taken using vegetation analysis. Correlation and regression tests were conducted to determine the relationship between NDVI values ​​and other variables. Based on the results of the NDVI analysis, three canopy density classes were obtained, low, medium, and high. The low canopy density class has the highest number of invasive species, while the high canopy density class has the least number of invasive plant species. The Poaceae family is the most found family with D. setigera as the dominant invasive species. There is a strong correlation between canopy density and NDVI values. Keywords: Dipterocarpaceae, Shorea sp., Poaceae
Species Composition and Tree Structure at Various Altitudes in Gunung Halimun Salak National Park Istomo; Hartoyo, Adisti Permatasari Putri; Azizah, Ummiati
Journal of Tropical Silviculture Vol. 15 No. 02 (2024): Jurnal Silvikutur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.15.02.115-122

Abstract

rainforest ecosystems. This study aimed to estimate the species composition and tree structure at various altitudes in GHSNP. The study used vegetation analysis through plots measuring 100 m × 20 m with three replications at three altitude ranges: <1000 masl (lowland), 1000-1500 masl (sub-montane), and >1500 masl (montane). At altitudes <1000 and 1000-1500 masl, Pinus merkusii and Schima wallichii are the dominant species, while Dacrycarpus imbricatus dominates at altitudes >1500 masl. The total volume of trees at each altitude range is 473.9 m3/ha, 221.67 m3/ha, and 201.11 m3/ha, respectively. As altitude increases, tree volume decreases. The species diversity index (H') value at all three altitudes is classified as medium, with a 1≤H'≤3 value. Keywords: Dacrycarpus imbricatus, Pinus merkusii, Schima wallichii, West Java
Korelasi Cadangan Karbon terhadap Kerapatan Vegetasi Berdasarkan NDVI di Zona Rehabilitasi Taman Nasional Gunung Halimun Salak Istomo; Permatasari Putri Hartoyo, Adisti; Ramdhani Fitriansyah, Muhammad
Journal of Tropical Silviculture Vol. 16 No. 01 (2025): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.16.1.1-8

Abstract

Kenaikan konsentrasi Gas Rumah Kaca (GRK) dan emisi karbon merupakan faktor yang berkontribusi besar terhadap perubahan iklim global. Taman Nasional Gunung Halimun Salak (TNGHS) merupakan salah satu kawasan konservasi yang berpotensi dalam mengurangi dampak perubahan iklim melalui peningkatan cadangan karbon. Penelitian ini bertujuan untuk menganalisis kerapatan dan tingkat keanekaragaman vegetasi, menduga potensi biomassa dan cadangan karbon tersimpan di atas permukaan tanah, serta menganalisis hubungan antara nilai NDVI dengan jumlah jenis, kerapatan pohon, keanekaragaman vegetasi, luas bidang dasar (LBDS), dan konsentrasi karbon. Metode yang digunakan analisis vegetasi, sedangkan pendugaan karbon menggunakan pendekatan alometrik dan destruktif untuk tingkat semai dan tumbuhan bawah. Plot yang dibangun berukuran 50 m × 50 m sebanyak 14 plot. Berdasarkan hasil analisis NDVI, kelas kerapatan terbagi menjadi kelas 1 (0,321–0,485), dan kelas 2 (0,485–0,746). Komposisi vegetasi di zona rehabilitasi TNGHS terdiri atas 103 jenis tumbuhan dan didominasi oleh rasamala (Altingia excelsa). Rata-rata biomassa dan konsentrasi karbon berdasarkan kelas kerapatan yang diperoleh masing-masing sebesar 296,55 ton/ha dan 139,38 ton/ha. Konsentrasi karbon memiliki korelasi kuat dengan LBDS (r = 95,5%). Nilai NDVI berkorelasi paling tinggi dengan kerapatan pohon per hektar.
Pendugaan Kerapatan Vegetasi dan Cadangan Karbon di HLG Sungai Buluh Jambi menggunakan NDVI Istomo; Indra Putra, Erianto; Meyrista Sekar Agta Putri, Nindhy
Journal of Tropical Silviculture Vol. 16 No. 02 (2025): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.16.02.98-106

Abstract

Sungai Buluh Peat Protection Forest (HLG) is a peat protected area in Jambi that still natural and characterized by a high degree of vegetation density. This study aimed to estimate vegetation density using the Normalized Difference Vegetation Index (NDVI), estimate biomass and carbon stock along with fire hazard levels, and analyze the relationship between NDVI, vegetation diversity, and carbon reserves in HLG Sungai Buluh. The methods used include vegetation analysis, carbon estimation using allometric and destructive testing for seedlings and understory plants, fire hazard level estimation using land cover scoring and NDVI values. The result showed NDVI was categorized into three classes, nemely class 1 (-0,015 – 0,369), class 2 (0,369 – 0,438), class 3 (0,438 – 0,633). The most families found were Lauraceae, Dipterocarpaceae, and Myrtaceae. The average biomass and carbon stock obtained were 191,26 tons/ha and 89,90 tons C/ha, respectively. Fire hazard levels in all classes were found to be high. Carbon stock strongly correlated with LBDS (r = 98,2%). The NDVI value strongly correlated with the number of species.
Pengaruh Kualitas Tempat Tumbuh Terhadap Pertumbuhan Cemara Udang (Casuarina equisetifolia L.) Di Pantai Cemara Tuban: The Effect of Site Quality on Growth of Beach She-Oak (Casuarina Equisetifolia) on Cemara Beach, Tuban. Istomo, Istomo; Susanti, Cindhy
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.v18i2.10583

Abstract

Beach she-oak (Casuarina equisetifolia) is the one of the most commonly she-oak species that found and planted in coastal areas. Research was conducted to determine the growth of C. equisetifolia, environmental conditions, and the effect. Data were collected by making 10 circlular plots with a radius of 17,8 m with an area of 0,1 ha and 5 subplots in each plot. The data analysis used was understorey vegetation analysis, soil analysis, and multiple linear regression models of stepwise procedure. The results showed that the species of C. equisetifolia found amounted to 486 ind/ha at various growth stages and 10 species of understorey. The basal area is determined by stand density. The greater stand density, the greater the total growth. The best site quality based on average dominant height and age is found in plot 9. Factors that influence C. equisetifolia basal areas are soil pH, N-total, C-organic, temperature and humidity with of 80,4%.
Tingkat Bahaya Kebakaran dan Kerapatan Lahan Gambut di Hutan Lindung Gambut Sungai Buluh Jambi: Fire Danger Level and Peatland Density in The Jambi Buluh River Peat Protected Forest Istomo, Istomo; Putra, Erianto Indra; Berliyana, Cincy
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.v20i1.19291

Abstract

Forest and peatland fires are serious environmental issues in Indonesia, including in Jambi Province. This study aims to identify fire hazard levels based on peatland vegetation density using the Normalized Difference Vegetation Index (NDVI) method in the Sungai Buluh Peat Protected Forest (HLG), Jambi. NDVI data were obtained from satellite imagery and analyzed to assess vegetation density, which was then correlated with fire hazard levels. A total of 12 plots measuring 50 m x 50 m each were established. Based on NDVI analysis, density classes were divided into class 1 (0.0573-0.307), class 2 (0.307-0.398), and class 3 (0.398-0.584). The study area was predominantly occupied by rengas laut stands. The results indicated that areas with low NDVI values have a higher fire risk compared to areas with high NDVI values. The dominant stand type was rengas laut. NDVI and humidity showed the highest correlation (0.780).
Karakteristik Vegetasi dan Tanah Hutan Pasca Kebakaran di Gunung Lawu, BKPH Lawu Selatan, KPH Lawu Ds : Vegetation and Soil Characteristics of Post-Fire Forest in Mount Lawu, BKPH Lawu Selatan, KPH Lawu Ds Irwansyah, Muh Yosrilrafiq; Istomo, Istomo; Syaufina, Lailan
JURNAL HUTAN TROPIKA Vol 20 No 2 (2025): Volume 20 Nomor 2 Tahun 2025
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v20i2.21564

Abstract

Forest fire constitutes a major ecological disturbance that induces substantial alterations in ecosystem structure and function, particularly affecting vegetation and soil properties. The Mount Lawu forest, situated within the management unit of BKPH Lawu Selatan, KPH Lawu Ds, has undergone multiple fire events over the past two decades. This study aims to examine characteristics across distinct successional stages, assess soil physicochemical attributes, and identify potential pioneer species capable of adapting to post-fire environments. The investigation was conducted across three successional stages represented by shrubland (burned in 2019), young secondary forest (burned in 2015), and old secondary forest (burned in 2002). Vegetation sampling employed nested plot design, while soil analysis included measurements of pH, organic carbon, total nitrogen, carbon-to-nitrogen ratio, cation exchange capacity, base saturation, and bulk density. The findings reveal successional shifts in species dominance from Imperata cylindrica and Schima wallichii in early stages to Lithocarpus sundaicus in mature forest stands. The assessment of physical and chemical soil properties showed variable results. Biomass accumulation increased along the successional gradient, indicating enhanced ecosystem development. Soil variables exhibited patterns in relation to vegetation structure and biomass.
Peningkatan Pengetahuan Kelompok Tani melalui Pelatihan Budi Daya Porang di Desa Sugihwaras, Magetan, Jawa Timur Istomo, Istomo; Rahaju, Sri; Hartoyo, Adisti Permatasari Putri
Agrokreatif: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 9 No. 1 (2023): Agrokreatif Jurnal Ilmiah Pengabdian Kepada Masyarakat
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/agrokreatif.9.1.1-9

Abstract

The Subur farmer group is located in Sugihwaras Village, Maospati District, Magetan Regency, East Java which develops sugarcane (Saccharum officinarum) and teak (Tectona grandis) with a monoculture pattern. Monoculture cultivations produce a single income for farmers, hence other adaptive intolerant commodities and sites that generate alternative income are needed. One of them is Porang (Amorphophallus muelleri Blume). The farmer group’s knowledge and skills related to porang cultivation are very limited. The aims of this activity were: 1) To train farmer groups related to porang cultivation planted with agroforestry patterns; 2) To analyze knowledge changes of farmer groups regarding porang cultivation; and 3) To evaluate the implementation of the training program. The results showed that training on porang cultivation and making agroforestry demonstration plots were able to increase the knowledge of the Subur farmer group. The pre-test score was 65,1 (55%) while the post-test was 88,6 (75%). Based on the evaluation of the assessment of training activities by farmers, as many as 74,3% of farmers stated that they strongly agreed that the porang cultivation training was very useful and suitable for their needs. In addition, the activity feasibility analysis showed that this training is categorized as very feasible to be implemented with a score of 94%. Porang cultivation training for the Subur farmer group was able to increase knowledge and the potential to earn additional income for the people of Sugihwaras Village, Magetan Regency, East Java.
Co-Authors . Solichin Abdul Aziz Adisti Permatasari Putri Hartoyo Agus Hikmat Aji Nuralam Dwisutono Aji Nuralam Dwisutono Alvi Nadia Putri Andita Pradiastoro Andita Pradiastoro, Andita Ari Fardian Ariyani Pramudita Utami Atok Subiakto Atok Subiakto Atok Subiakto Azizah, Ummiati Bambang Hero Saharjo Basuki Wasis Berliyana, Cincy Bintang C. H. Simangunsong Cahyo Wibowo Detty Sumiyati Didik Suharjito Djoko Wahjono Edhi Sandra Elsa Widyastuti Endang Suhendang Erianto Indra Putra Eva Prihatiningtyas Fauzi Kiswantara Ferliana, Erika Fifi Gus Dwiyati Hamzah Hamzah Haris Arifiyanto Hidayat Haris Arifiyanto Hidayat, Haris Arifiyanto Herry Purnomo Hesti Lestari Tata Ida Sufaidah Irwansyah, Muh Yosrilrafiq ISKANDAR ZULKARNAEN SIREGAR Iwan Hilwan Karlina Fitri Kartika Khairia Nafia Khalid Hafazallah Lailan Syaufina Leti Sundawati Lilis Setyawati Lisdayanti Lisdayanti Ma'shum Afnani Mega Damayanti Meyrista Sekar Agta Putri, Nindhy Mia Afriyani Mufti Abdillah Mufti Abdillah Muhdin Niechi Valentino Nisa Armila Nong Ayu Eka Widyasari Nur Eliya Farida Nurheni Wijayanto Nuroh Bawaihaty Nurul Hidayati Permatasari Putri Hartoyo, Adisti Prijanto Pamoengkas Prima Martha Dena Putri Novita Sari Rachmat, Henti Hendalastuti Rahaju, Sri Rahmadianto, Susilo Ramdhani Fitriansyah, Muhammad Rendra Piscestria Nugraha Rhomi Ardiansyah Rizki Mardhatillah Sandy Ghifary Sri Rahaju Sri Wilarso Sri Wilarso Sri Wilarso Budi Susanti, Cindhy Susilo Rahmadianto Syafda Roswandi Tarma Purwanegara Ujang Suwarna Vianti Vianti Wahyu Hartarto Yadi Setiadi Yuli Sunarti Yuniar Safitri