cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Enik Nurlaili Afifah
Contact Email
eniknurlaili21@ugm.ac.id
Phone
+628112632106
Journal Mail Official
jip.faperta@ugm.ac.id
Editorial Address
Gedung A1.Lt.2 Fakultas Pertanian, Universitas Gadjah Mada Jalan Flora, Bulaksumur, Yogyakarta 55281
Location
Kab. sleman,
Daerah istimewa yogyakarta
INDONESIA
jurnal Ilmu Pertanian (Agricultural Science)
Published by Universitas Gadjah Mada
ISSN : 01264214     EISSN : 25277162     DOI : https://doi.org/10.22146/ipas
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Ilmu Pertanian (Agricultural Science) with registered number ISSN 0126-4214 (print) ISSN 2527-7162 (online) is a scientific open access journal published by Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI (Perhimpunan Sarjana Pertanian Indonesia). Ilmu Pertanian (Agricultural Science) provides a forum for the publication of scientific articles in the scope of agricultural sciences with priority on science and plant technology (plantation, horticulture, and forestry), including aspects of postharvest and socioeconomic. Ilmu Pertanian (Agricultural Science) is published three times annually, April, August, and December.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 559 Documents
 52   53   54   55   56 
Morphological Characterization of F1 Hybrids Pitcher Plant (Nepenthes spp.) in North Sumatra, Indonesia Putri Lukmanasari; Tati Maharani; Ernita Ernita; Mardaleni Mardaleni; Siti Yuli Meilanda Sormin
Jurnal Ilmu Pertanian Vol 11, No 2 (2026): August
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.112637

Abstract

Pitcher plants (Nepenthes spp.) are unique and interesting flora that have been widely cultivated as ornamental plants. This species is attractive due to its pitcher shape and diverse colors. Sumatera Island is the second largest center of Nepenthes diversity in the world after Kalimantan Island. Each pitcher plant hybrid has diverse quantitative and qualitative characteristics. This study aimed to describe 18 quantitative and 33 qualitative characteristics of pitcher plants based on morphological markers. This study was conducted in North Sumatra Province in the HPH PT. Teluk Nauli area of Mandailing Natal Regency, Tarutung, North Tapanuli Regency, and Lake Siais, South Tapanuli Regency. The materials used in this study were pitcher plant hybrids, namely Nepenthes mirabilis x N. sumatrana, N. eustachya x N. sumatrana, and N. eustachya x N. mirabilis, with each species consisting of three individuals obtained from the exploration of the sampling locations. The results indicated that N. mirabilis x N. sumatrana exhibited superior traits, including larger pitcher size, wider peristome, and greater color variation highlighting its high ornamental and adaptive potential. N. eustachya x N. sumatrana showed relatively stable intermediate characteristics, while N. eustachya x N. mirabilis displayed unique pitcher morphology and moderate vigor. These findings emphasize the value of hybrids for breeding and the importance of conserving genetic for sustainable Nepenthes utilization.
Exploration of Pesticide-Tolerant Indigenous Bacteria from Shallot Monoculture Farm Zulfa Fatmawati; Anjar Cahyaningtyas; Maulana Khafid Arrohman; Yanisworo Wijaya Ratih; Dias Setiyani; Rio Triatmojo Nugroho; Bima Wirayuda Nugraha
Jurnal Ilmu Pertanian Vol 11, No 2 (2026): August
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.113215

Abstract

Intensive and prolonged use of methomyl and abamectin in Indonesian horticultural systems has raised concerns about soil contamination and the decline of beneficial microbial communities. This study aimed to isolate and characterize indigenous soil bacteria capable of tolerating and potentially degrading these pesticides. Soil samples were collected from a shallot field with a long history of pesticide application in Kendal, Central Java, and cultured on minimal salt medium (MSM) supplemented with methomyl, abamectin, or their combination at concentrations of 0, 25, 50, 75, and 100 ppm. A total of 88 bacterial colonies were observed and categorized into four morphotypes, namely isolates W, C, Y, and R. Growth assays revealed that isolates W and C demonstrated the highest tolerance, indicated by the highest optical density (OD) and maintaining viability across all pesticide treatments, although reduced growth was observed under combined pesticide exposure. Several isolates exhibited increased optical density after 72 hours, suggesting potential physiological adaptation to xenobiotic stress conditions. Isolates with the highest growth performance under pesticide application were identified through 16S rRNA sequencing as Acinetobacter baumannii, Bacillus subtilis, and Brevibacillus nitrificans. Pathogenicity tests were performed on tobacco leaves to ensure their safety for agricultural applications. No necrosis, chlorosis, or leaf spotting was observed up to seven days after inoculation, indicating that all isolates were non-pathogenic under the conditions tested. Overall, the indigenous isolates, particularly isolates W and C, show high tolerance to methomyl and abamectin applications and thus have the potential as candidates for microbial-based bioremediation of methomyl- and abamectin-contaminated soils. Further investigation into their degradation pathways, enzymatic mechanisms, and field-scale performance is required to support their application in sustainable agricultural management.
Interactive Effects of Substrate Composition and Eco-Enzyme on Geranium (Pelargonium hortorum) Growth and Media Properties Masdalifa Ula; Sitawati Sitawati; Euis Elih Nurlaelih
Jurnal Ilmu Pertanian Vol 11, No 2 (2026): August
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.116743

Abstract

Optimizing growing media quality is essential for vegetative growth of geranium (Pelargonium hortorum), particularly under limited substrate volume in pot cultivation. Rice husk-based substrates are widely used in Indonesia due to their availability and low cost; however, their high C/N ratio may induce nitrogen immobilization and restrict plant growth. In addition, eco-enzyme application has the potential to accelerate organic matter decomposition and nutrient mineralization, thereby reducing the adverse effects of high C/N ratios and improving nitrogen availability for plant growth. A factorial completely randomized design was used to evaluate three eco-enzyme concentrations (0, 15, and 30 mL L⁻¹) and three substrate compositions of cocopeat, goat manure, and rice husk biochar (1:1:0, 1:1:1, and 1:1:2). Data were analyzed using ANOVA and Tukey’s HSD test (p ≤ 0.05). Increasing the proportion of rice husk biochar reduced bulk density and increased total porosity and air space relative to lower biochar proportions, whereas water-holding capacity decreased. Eco-enzyme application accelerated organic matter decomposition, as indicated by reduced organic matter content and C/N ratio, while stabilizing growing media pH within the near-neutral range by the end of the experiment. Application of 30 mL L⁻¹ eco-enzyme to the medium balanced composition (1:1:1) increased plant height, number of leaves, leaf area, dry weight, and water use efficiency up to 55.2% compared to the control media. Thus, the experiment proves the synergistic effect of eco-enzyme treatment and organic substrate composition on improving the quality of the growing media and promoting vegetative growth in a limited amount of substrate.
Morphological, Physiological and Genetic Study of Black Ginger Plants (Kaempferia parviflora) Resulting from Gamma-Ray Irradiation Aulia Fikriatin Najah; Suprayogi Suprayogi; Prita Sari Dewi; Eka Oktaviani
Jurnal Ilmu Pertanian Vol 11, No 2 (2026): August
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.116905

Abstract

Maize Black ginger (Kaempferia parviflora) is a medicinal plant rich in bioactive compounds yet exhibits low genetic variability in nature due to vegetative propagation, posing a major challenge for the development of superior cultivars. Gamma-ray irradiation has been widely used as an effective mutation breeding technique to induce heritable genetic variation. Therefore, to provide new genetic resources for future breeding programs, this study aimed to evaluate the effects of gamma-ray irradiation on the morphological characteristics, physiological characteristics, and genetic diversity of black ginger. The study was conducted at the Green House and Plant Breeding Laboratory of Jenderal Soedirman University from June to December 2025 using a single-factor Randomized Complete Block Design (RCBD). The treatments consisted of 7 irradiation dose levels (0, 2, 4, 6, 8, 10, and 15 Gy) with five replications. Data were analyzed using ANOVA followed by a 5% LSD test, while molecular analysis was carried out using RAPD markers. The results of the analysis of variance (ANOVA) showed that gamma-ray irradiation significantly affected the morphological characteristics of black ginger, including plant height, number of leaves, leaf length, and leaf width, as well as the physiological characteristics, namely chlorophyll content and stomatal density (P < 0.05). Mean comparisons using the Least Significant Difference (LSD) test further confirmed significant differences among the irradiation treatments. In addition, gamma-ray irradiation induced genetic variation, as revealed by RAPD marker analysis. Molecular analysis using three specific primers (OPA-01, OPB-02, and OPC-05) successfully detected polymorphism levels of up to 84.23%. Gamma-ray irradiation effectively induced genetic variation in black ginger (Kaempferia parviflora), as evidenced by changes in RAPD banding patterns and DNA polymorphism. These genetic variations, together with the observed morphological and physiological responses, indicate that gamma irradiation is an effective approach for broadening the genetic variability of black ginger and provides valuable genetic resources for future breeding programs.
Heterogeneity of Arthropods on Polyculture System using Biopesticide of Chromolaena odorata and Eggshells Mixture Weri Herlin; Oktaviani Oktaviani; Fadhil Muhammad Raihan
Jurnal Ilmu Pertanian Vol 11, No 2 (2026): August
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.117972

Abstract

Maize and chili polyculture systems have the potential to enhance agroecosystem productivity, but their effectiveness is strongly influenced by the dynamics of arthropods, including phytophages, predators, parasitoids, decomposers, and pollinators. This study inventoried arthropod communities by analyzing the abundance of ecological groups and calculating diversity, evenness, and dominance index. The aim was to provide an ecological foundation to strengthen integrated pest management and support the implementation of sustainable agriculture in line with Asta Cita's development direction. The research was conducted at the Agro Training Centre, Faculty of Agriculture, Sriwijaya University. To obtain samples in the maize–chili polyculture system, several types of traps were used, including yellow sticky traps, methyl eugenol traps, pitfall traps, pan traps, light traps, sweep nets, and visual traps, which were placed in each planting bed. All traps except the light trap were installed between 06:00 and 07:00 and operated for 24 hours, except for the light trap, which was installed at 18:00 and operated for 12 hours. The diversity index obtained was H' = 1.15, indicating a medium category; the evenness value (E = 0.48) showed that species distribution was uneven; and the dominance index (D = 0.30) suggested the presence of a sub-dominant species. The most frequently captured species was Bactrocera sp 1, belonging to the order Diptera and functioning as a phytophage. Clustering analysis indicated a correlation between Bactrocera sp 1 and Bactrocera sp 2. Overall, the dominant arthropod functional group in the maize–chili polyculture system was phytophagous species.
Soil Arthropod Community Structure Across Three Traditional Land-Use Sites in Baduy Customary Land Endang Sulistyorini; Kartina Abdul Murod; Nurmayulis Nurmayulis; Susiyanti Susiyanti; Mirajiani Mirajiani
Jurnal Ilmu Pertanian Vol 11, No 2 (2026): August
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.120328

Abstract

This study compared soil arthropod communities across three traditional land-use sites, namely Reuma, Jami, and Huma, which are located within Baduy customary land, with soil arthropods serving as indicators of soil health and ecosystem stability. This study investigated the activity density, diversity, dominance, and ecological roles of soil arthropods across these three land-use types, along with their relationship with key environmental variables. Soil arthropod communities were sampled using pitfall traps set along 100 m transects (ten sampling points per land-use type) and identified to the class and order levels. Measured environmental variables included soil pH, organic carbon, organic matter, total nitrogen, soil temperature, and light intensity. The data collected were analyzed using calculations of activity density, dominance index, Shannon–Wiener diversity index, and Pearson correlation analysis. A total of 537 individuals, representing two classes and ten orders, were recorded. Jami exhibited the highest activity density (241 individuals), followed by Huma (154 individuals) and Reuma (142 individuals). The Shannon–Wiener index (H′) ranged from 0.86 to 1.03, indicating low taxonomic diversity at the order level, while the dominance index ranged from 0.45 to 0.57, indicating moderate dominance by Hymenoptera. Predatory fauna dominated the community, comprising an estimated 93.66% to 97.93% of all collected individuals based on ordinal-level functional guild assignment. Soil organic matter levels (3.93%–5.88%) indicated naturally fertile soil conditions. Exploratory Pearson correlation analysis showed positive associations of soil pH, organic carbon, total nitrogen, and soil temperature with several soil arthropod orders, whereas light intensity showed negative associations. Overall, the three sampled land-use sites differed in soil arthropod community composition and activity density, with Jami showing the highest activitydensity.
Effectiveness of Organic Fertilizers Inoculated with Trichoderma Viride in Reducing Corm Damage Caused by Fusarium Wilt in Banana (Musa spp.) Siti Hardianti Wahyuni; Meiliana Friska; Surya Handayani; Jumaria Nasution
Jurnal Ilmu Pertanian Vol 11, No 2 (2026): August
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.122170

Abstract

Fusarium wilt, caused by Fusarium oxysporum f. sp. cubense (Foc), is one of the most destructive soil-borne diseases affecting banana production worldwide. Sustainable management of this disease requires environmentally friendly approaches that can suppress pathogen activity while improving soil biological properties. This study aimed to evaluate the effectiveness of different organic fertilizers inoculated with Trichoderma viride in delaying disease development and reducing corm damage caused by Foc in banana plants. The experiment was arranged in a completely randomized design with eight treatments: untreated control, chicken manure, chicken manure + T. viride, cattle manure, cattle manure + T. viride, rice straw, rice straw + T. viride, and a combination of chicken manure, cattle manure, and rice straw + T. viride. Each treatment was replicated four times. The main variables observed were incubation period and corm damage intensity following Foc inoculation. The results showed that the application of organic fertilizers inoculated with T. viride significantly (P < 0.05) prolonged the incubation period and reduced corm damage intensity compared to the untreated control and treatments receiving organic fertilizers without T. viride. The combined application of chicken manure, cattle manure, and rice straw enriched with T. viride provided the greatest disease suppression, resulting in the longest incubation period (30.00 days after inoculation) and the lowest corm damage intensity (18.70%). In contrast, untreated plants exhibited the shortest incubation period (12.50 days) and the highest corm damage intensity (86.00%). A strong negative relationship between incubation period and corm damage intensity indicated that delayed symptom development was closely associated with reduced disease severity. These findings suggest that combining diverse organic amendments with T. viride can enhance biological suppression of Foc, reduce disease development, and improve the potential sustainability of banana production. Therefore, this integrated approach represents a promising environmentally friendly strategy for managing Fusarium wilt in banana cultivation.
Classification of Salak Sidempuan Productivity Using Machine Learning Based on Soil Fertility and Rainfall Data in North Sumatra, Indonesia Surya Handayani; Siti Hardianti Wahyuni; Meiliana Friska; Jumaria Nasution
Jurnal Ilmu Pertanian Vol 11, No 2 (2026): August
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.122182

Abstract

Land productivity assessment is important for understanding variation in Salak Sidempuan production under different soil and climatic conditions. This study aimed to classify Salak Sidempuan productivty using soil fertility and annual rainfall data and to compare the performance of five machine learning algorithms. Data from 500 Salak Sidempuan tree observations were collected from Marancar, West Angkola, and South Angkola, South Tapanuli, Indonesia. The predictor variables consisted of soil pH, organic carbon, nitrogen, phosphorus, potassium, and annual rainfall, while productivity was divided into low, moderate, and high classes. Decision Tree, Random Forest, Support Vector Machine, XGBoost, and LightGBM were optimized using 5-fold cross-validation on the training dataset and evaluated using an independent testing dataset. Among the evaluated models, Random Forest achieved the highest performance, with an accuracy of 66.40%, precision of 67.01%, recall of 66.47%, and F1-score of 66.46%. Feature importance analysis showed that annual rainfall had the highest relative contribution (24.8%), followed by C-organic (22.1%) and nitrogen (17.6%), while potassium, phosphorus, and soil pH contributed 13.9%, 11.8%, and 9.8%, respectively. These findings indicate that soil fertility and rainfall variables provide useful information for distinguishing Salak Sidempuan productivity classes. However, the moderate classification performance indicates that the selected variables do not fully explain productivity variation. The results therefore provide an initial data-driven assessment of Salak Sidempuan productivity based on the environmental variables included in the study.
Transpiration and Stomatal Conductance of Rice (Oryza sativa L.) Along an Altitudinal Gradient Jumaria Nasution; Meiliana Friska; Surya Handayani; Siti Hardianti Wahyuni
Jurnal Ilmu Pertanian Vol 11, No 2 (2026): August
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.122271

Abstract

Altitude-associated changes in microclimate may influence leaf gas exchange and water relations in rice. This study evaluated transpiration rate and stomatal conductance of rice (Oryza sativa L. cv. Inpari Sembilan) along an altitudinal gradient in South Tapanuli Regency and Padangsidimpuan City, North Sumatra, Indonesia. Measurements were conducted at six locations ranging from 316 to 647 m above sea level, with 20 plants sampled at each location. Microclimatic variables, including air and leaf temperatures, relative humidity, photosynthetically active radiation (PAR), and leaf-to-air vapor pressure deficit (VPD), together with transpiration rate (E) and stomatal conductance (gs), were measured on fully expanded flag leaves using a portable photosynthesis system. Transpiration rate and stomatal conductance showed a non-linear pattern along the elevation gradient, with the highest values observed at intermediate elevations. The highest E (0.886 mmol H₂O m⁻² s⁻¹) and gs (0.055 mol m⁻² s⁻¹) were recorded at Sibong-bong (393 m asl), whereas lower values occurred at both lower and higher elevations. Mean VPD decreased from 2.37 kPa at 316 m to 1.45 kPa at 647 m asl. Quadratic regression indicated a relatively weak relationship between elevation and transpiration rate (R² = 0.218), suggesting that elevation alone explained only a limited proportion of the observed variation. Overall, rice leaf gas exchange varied considerably along the altitudinal gradient, with intermediate-elevation sites showing more favorable conditions for transpiration and stomatal conductance. These findings indicate that local microclimatic factors, particularly temperature, humidity, radiation, and VPD, should be considered together with elevation when evaluating physiological responses of rice across different agroecological environments.

Page 56 of 56 | Total Record : 559

 52   53   54   55   56 

Filter by Year

1969 2026


Reset
Filter By Issues
All Issue Vol 11, No 2 (2026): August Vol 11, No 1 (2026): April Vol 10, No 3 (2025): December Vol 10, No 2 (2025): August Vol 10, No 1 (2025): April Vol 9, No 3 (2024): December Vol 9, No 2 (2024): August Vol 9, No 1 (2024): April Vol 8, No 3 (2023): December Vol 8, No 2 (2023): August Vol 8, No 1 (2023): April Vol 7, No 3 (2022): December Vol 7, No 3 (2022): December (In Press) Vol 7, No 2 (2022): August Vol 7, No 1 (2022): April Vol 6, No 3 (2021): December Vol 6, No 2 (2021): August Vol 6, No 1 (2021): April Vol 5, No 3 (2020): December Vol 5, No 2 (2020): August Vol 5, No 1 (2020): April Vol 4, No 3 (2019): December Vol 4, No 2 (2019): August Vol 4, No 1 (2019): April Vol 3, No 3 (2018): December Vol 3, No 2 (2018): August Vol 3, No 1 (2018): April Vol 2, No 3 (2017): December Vol 2, No 2 (2017): August Vol 2, No 1 (2017): April Vol 1, No 3 (2016): December Vol 1, No 2 (2016): August Vol 1, No 1 (2016): April Vol 18, No 3 (2015): December Vol 18, No 2 (2015): August Vol 18, No 1 (2015): April Vol 17, No 1 (2014): Juni Vol 16, No 2 (2013): Desember Vol 16, No 1 (2013): Juni Vol 15, No 2 (2012): Desember Vol 15, No 1 (2008): Juni Vol 14, No 2 (2007): Desember Vol 14, No 1 (2007): Juni Vol 13, No 2 (2006): September Vol 13, No 1 (2006): Maret Vol 12, No 2 (2005): Desember Vol 12, No 1 (2005): Juni Vol 11, No 2 (2004): Desember Vol 11, No 1 (2004): Juni Vol 10, No 2 (2003): Desember Vol 10, No 1 (2003): Juni Vol 9, No 2 (2002): November Vol 9, No 1 (2002): Juni Vol 8, No 2 (2001): November Vol 8, No 1 (2001): Juni Vol 7, No 2 (2000): November Vol 7, No 1 (2000): Juli Vol 6, No 2 (1998): September Vol 5, No 4 (1994): September Vol 5, No 3 (1993): September Vol 5, No 2 (1992): September Vol 5, No 1 (1992): April Vol 4, No 8 (1992): Februari Vol 4, No 7 (1991): September Vol 4, No 6 (1991): Juli Vol 4, No 5 (1989): Februari Vol 4, No 4 (1987): Februari Vol 4, No 3 (1986): Juli Vol 4, No 2 (1986): April Vol 4, No 1 (1986): Februari Vol 3, No 8 (1984): Juli Vol 3, No 7 (1984): April Vol 3, No 6 (1984): Februari Vol 3, No 5 (1982): Desember Vol 3, No 4 (1981): Desember Vol 3, No 3 (1981): Oktober Vol 3, No 2 (1981): Agustus Vol 3, No 1 (1981): Juni Vol 2, No 8 (1980): Oktober Vol 2, No 7 (1980): Juni Vol 2, No 6 (1979): Mei Vol 2, No 5 (1978): Desember Vol 2, No 4 (1978): Juli Vol 2, No 3 (1977): Desember Vol 2, No 2 (1977): Juni Vol 2, No 1 (1976): Desember Vol 1, No 8 (1976): Desember Vol 1, No 7 (1973): Mei Vol 1, No 6 (1972): Juni Vol 1, No 5 (1970): Juni Vol 1, No 1-2 (1969): Agustus-Desember Vol 1, No 4 (1969): Desember Vol 1, No 3 (1969): Mei More Issue