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Benny Hidayat
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PERTANIAN TROPIK
Published by Universitas Sumatera Utara
ISSN : 26557576     EISSN : 23564725     DOI : https://doi.org/10.32734/jpt.
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Tropical Agriculture Journal (JPT) is a peer-reviewed online journal of Agriculture Postgraduate Study Program Universitas Sumatera Utara (USU). Journal is a result of research, or scientific reviews of researchers, students and agricultural institutions, and others related to agricultural studies in the tropical region. Published in Indonesian and English language with 3 volumes/year (April, August, December). These articles are indexed by Google Scholar, PKP Indexing, RootIndexing, Portal Garuda, Indonesian Publication Index (Garuda Portal), One Search Perpustakaan Nasional, BASE (Bielefeld Academic Search Engine), and Directory of Research Journal Indexing (DRJI), JPT is member of AJPI (Association of Indonesian Agriculture Journal, and strives to be a means of periodic, accredited, national scientific publications or reputable international publications through.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 389 Documents
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Testing Fertilizer Application on Melon Plant Growth and Yield (Cucumis melo L.) Ida Ayu Widhiantari; Bahrul Sundusi Adnan; Nani Herwati; Slamet Nugroho
Jurnal Online Pertanian Tropik Vol. 13 No. 1 (2026): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jpt.v13i1.22578

Abstract

This study aims to investigate the effect of KNO₃ fertilizer application on the growth of melon plants during the vegetative and early generative phases. Melon was selected due to its high economic value; however, its productivity has declined as a result of suboptimal cultivation techniques, particularly in fertilizer management. The research was conducted at the Center for Agricultural Application and Modernization (BRMP) in West Nusa Tenggara using a one-factor Completely Randomized Design (CRD) with five KNO₃ dosage treatments (1, 3, 5, 7, and 9 g/L), each replicated three times. Observed parameters included plant height, number of leaves, number of male and female flowers, number of fruit initials, and fruit diameter. Data were analyzed using ANOVA followed by the DMRT post-hoc test at a 5% significance level. The results indicated that although the 5 g/L treatment tended to yield better results, particularly in the number of flowers and fruit diameter, statistically, all treatments showed no significant effect. Constraints such as pest attacks, pollination disturbances, and plant diseases were identified as non-nutritional factors affecting crop outcomes.
Characterization and Effectiveness of Moringa Leaves (Moringa oleifera Lamk.) And Azotobacter chroococcum Bio-Organic Fertilizer on the Growth of Green Spinach Elli Afrida; Benny Hidayat
Jurnal Online Pertanian Tropik Vol. 13 No. 1 (2026): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jpt.v13i1.23397

Abstract

The decline in spinach production is a challenge in sustainably increasing its productivity. One potential solution is the use of bio-organic fertilizer (BOF) derived from leaves of Moringa (Moringa oleifera Lamk.) and Azotobacter chroococcum because it contains essential nutrients for plant growth. This study aims to characterize moringa leaf BOF and its effectiveness in increasing green spinach growth (Amaranthus tricolor L.). The research was conducted experimentally using five treatments: P1 (10% Moringa leaves), P2 (15% Moringa leaves), P3 (20% Moringa leaves), K⁻ (0% Moringa leaves), and K⁺ (Commercial Fertilizer). Observed parameters included fertilizer pH, temperature, color, plant height, and number of leaves. Fertilizer observation data were analyzed descriptively based on SNI standards and credible journals, while plant growth data were analyzed using ANOVA and ANCOVA at a 5% significance level. The BOF produced had a pH of 6–7, a temperature of 26–27 °C, and a dark brown color. The best performance was obtained with treatment P3, producing an average plant height of 26.6 cm and 14 leaves. These findings indicate that Moringa leaf-based BOF has potential as an effective and environmentally friendly organic fertilizer to improve green spinach growth.
The effect of turmeric extract on the physiological responses of golden dragon fruit during postharvest storage Handoko; Ayu Purnamasari; Alfassabiq Khairi
Jurnal Online Pertanian Tropik Vol. 13 No. 1 (2026): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jpt.v13i1.24431

Abstract

Golden dragon fruit (Hylocereus megalanthus L.) is an economically important tropical fruit belonging to climbing cacti, which are well adapted to tropical and subtropical environments and exhibit high drought tolerance. Despite its commercial value and nutritional benefits, postharvest quality deterioration remains a major challenge, leading to significant losses in texture, flavor, aroma, and shelf life. Turmeric (Curcuma longa L.) extract has been reported to possess antimicrobial and bioactive compounds, particularly curcuminoids, which may contribute to the preservation of fruit quality during storage. This study aimed to determine the optimal concentration of turmeric extract and to evaluate its effects on the postharvest quality of golden dragon fruit. The experiment was conducted in March 2025 at PT Daya Semesta Agro Persada, Banyuasin Regency, South Sumatra, Indonesia. Fruits were harvested at 30 days after anthesis and stored under controlled conditions at 26.50 ± 1.02 °C and 75.77 ± 5.45% relative humidity, with individual weights ranging from 350 to 500 g. A Completely Randomized Design with four replications was employed, and treatments consisted of turmeric extract dissolved in distilled water at concentrations of 0, 5, 10, and 15 g L⁻¹. Observed parameters included fruit texture, flavor, aroma, physiological weight loss, fruit decay (rotting), and shelf life. Results indicated that golden dragon fruits treated with the highest concentration of turmeric extract (15 g L⁻¹) and stored for nine days exhibited superior retention of texture, flavor, and aroma. Furthermore, this treatment significantly reduced physiological weight loss and fruit decay while effectively extending shelf life compared with lower concentrations and the control. The findings suggest that turmeric extract at 15 g L⁻¹ is an effective postharvest treatment to maintain quality and prolong the shelf life of golden dragon fruit, providing practical implications for commercial production and storage management.
Effectiveness of Eco-Enzyme in Suppressing the Growth of Fusarium sp. on Shallot Plants (Allium cepa) In Vivo Fitria Sukma; Alfizar; Siti Shofiya Nasution; Muhammad Sayuthi; Hartati Oktarina Oktarina
Jurnal Online Pertanian Tropik Vol. 13 No. 1 (2026): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jpt.v13i1.25250

Abstract

Shallots (Allium ascalonicum L.) are a high-value horticultural commodity in Indonesia, but production often declines due to Fusarium sp., which cause yield losses of up to 80%. Control using synthetic chemical fungicides remains the primary choice for farmers, demanding environmentally friendly alternatives. This study tested the effectiveness of fruit peel eco-enzymes to control of Fusarium sp. in shallot plants. Five levels of eco-enzymes (0, 0.2, 0.6, and 1%) were applied before and after shallot planting. The results showed that eco-enzymes were able to delay the incubation period, reduce disease severity by 30%, and increase the number and weight of bulbs. It can be concluded that eco-enzymes are effective in controlling Fusarium sp., in shallot plants.
Growth and yield of Shallots (Allium ascalonicum L.) with Boron fertilization and cow blood liquid organic fertilizer Historiawati; Murti Astiningrum; Asri Vidyastuti; Elisa Anggraeni
Jurnal Online Pertanian Tropik Vol. 13 No. 2 (2026): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jopt.v13i2.21093

Abstract

Shallots are annual plants that are widely used as a cooking spice or medicine. This study aims to analyse the effect of giving boron and cow blood liquid organic fertilizer on the growth and yield of shallot bulbs (Allium ascalonicum L.). This research was carried out in October - December 2023 on land in Banyuwangi Village, Bandongan District, Magelang Regency, Central Java using a Complete Randomized Block Design (CRDB) with the first factor being boron administration (0 and 2.5 g/plot) and the factor both doses of cow blood liquid organic fertilizer LOF (20; 40; 60 and 80 ml/plot). The results of the research on the first factor did not show any significant difference, while for the second factor there was a significant difference in the parameters of flavonoid content, while for interactions there was an interaction between the number of leaves on the boron treatment and the dose of cow blood liquid organic fertilizer. Unstable weather means that the provision of boron and cow blood liquid organic fertilizer is unable to increase shallot productivity.
Rhizosphere microbial resistance test to fungicide Dimetomorph in vitro Putri Megawati Sari; Hanik Faizah; Irul Hidayati; Cici Fitri Yani
Jurnal Online Pertanian Tropik Vol. 13 No. 2 (2026): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jopt.v13i2.21669

Abstract

  Dimethomorph is a systemic fungicide utilized within Indonesian agricultural sector. Inappropriate application of dimethomorph fungicide may result in environmental contamination and the development of resistance among rhizosphere microorganisms. This study aims to ascertain the responses of rhizosphere microbial isolates to dimethomorph fungicide, thereby providing critical insights for evaluating the efficacy of this fungicide against rhizosphere microbes. Such information is essential for formulating plant pest and disease management strategies that utilize more suitable and sustainable dosages. The investigation involved testing bacterial isolates MR-B01, MR-B02, MR-B03, MR-B04, and fungal isolate MR-F01 against dimethomorph fungicide employing the agar diffusion method with disc paper. The experimental design incorporated a treatment factor with five variation concentrations of dimethomorph fungicide (0 g/L, 0.5 g/L, 1 g/L, 1.5 g/L, and 2 g/L), executed with ten repetitions. The findings indicated that varying concentrations of dimethomorph fungicide exhibited distinct effects on the resistance of the tested microbial isolates, specifically bacteria MR-B01, MR-B02, MR-B03, MR-B04, and fungal isolate MR-F01.
Interpretation analysis between rain, number of bunches and land slope on oil palm plantation productivity (Elaeis guineensis Jacq.) in Huta Padang Plantation PT. Perkebunan Nusantara IV regional 1 Alghi Fahry Lesmana; Irsal
Jurnal Online Pertanian Tropik Vol. 13 No. 2 (2026): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jopt.v13i2.21859

Abstract

This study aims to determine and analyze the effect of rainfall, rainy days, number of bunches and land slope on the productivity of oil palm plants (Elaeis guineensis Jacq.) in the Huta Padang plantation of PT. Perkebunan Nusantara IV Regional 1 from February to March 2025. The hypothesis of this study is that there is a real effect of rainfall, rainy days, number of bunches and land slope on the productivity of oil palm plants (Elaeis guineensis Jacq.) in the Huta Padang plantation of PT. Perkebunan Nusantara IV Regional 1. This study uses secondary data available at the plantation office administration and the board of directors, including data on FFB production and number of bunches from 2015 to 2024, monthly rainfall and rainy days data from 2014 to 2023 and land slope data in the form of digital elevation model (DEM) data obtained from a lidar sensor drone owned by PT Perkebunan Nusantara IV Regional 1 which was processed using the QGIS mapping software tool. The analysis method used is multiple linear regression analysis and correlation. The model is tested for its feasibility with the classical assumption test including the normality test, heteroscedasticity test, multicollinearity test, and autocorrelation test using the SPSS.v.25 for windows statistical tool. The data is tested and analyzed based on the slope of the land, namely flat, medium and high slopes. The results of this study indicate that rainfall and rainy days have no significant effect on oil palm productivity on flat, medium and high slopes in the Huta Padang plantation. The number of bunches has a significant effect on increasing oil palm productivity on flat, medium and high slopes in the Huta Padang plantation. Rainfall, rainy days, and the number of bunches simultaneously have a significant effect on oil palm productivity on flat, medium and high slopes in the Huta Padang plantation. The correlation of rainfall, rainy days, and the number of bunches has a strong influence on oil palm productivity on flat, medium and high slopes in the Huta Padang plantation.
Unveiling the impact of deforestation on soil saprotrophic fungal community composition in Mau Forest ecosystem in rift valley, Kenya Kennedy Okoth Ododa; Fredrick Otieno Ogolla
Jurnal Online Pertanian Tropik Vol. 13 No. 2 (2026): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jopt.v13i2.22886

Abstract

This study assessed how deforestation affected the diversity, richness, and community composition of soil saprotrophic fungus in Kenya's Mau Forest. Soil samples were collected from 60 plots across three disturbance levels (undisturbed, partially deforested, and deforested sites) during rainy and dry seasons. Fungal diversity was studied using colony-forming units (CFUs) and Shannon diversity indices, while soil physicochemical properties (pH, organic matter, nitrogen, and phosphorus) were assessed. Non-metric multidimensional scaling (NMDS), ANOVA, and Tukey's post hoc tests were used to evaluate differences and correlations. Fungal diversity and abundance significantly decreased with increasing disturbance. Diversity (Shannon index: 3.8 ± 0.3) and abundance (5.6 × 10⁵ CFU/g) were highest at undisturbed sites, followed by partially deforested (2.9 ± 0.4; 3.1 × 10⁵ CFU/g) and deforested (1.5 ± 0.2; 1.2 × 10⁵ CFU/g) sites. Boxplots showed significant differences, with the highest richness at undisturbed sites. NMDS revealed distinct fungal communities: Rhizopus and Mucor occurred in deforested areas, whereas Trichoderma and Penicillium dominated undisturbed sites. Fungal diversity and abundance were higher during the wet season but lowest at deforested sites throughout both seasons. Nitrogen (r = 0.78, p < 0.05) and organic matter (r = 0.84, p < 0.01) showed positive associations, whereas phosphorus showed a negative association (r = -0.65, p < 0.05). Deforested soils had the lowest nitrogen (2.1% ± 0.3) and organic matter (15.6% ± 1.2) compared with undisturbed soils (5.3% ± 0.9; 0.8% ± 0.1). The study emphasizes deforestation's negative consequences and the need for replanting and sustainable land-use practices.
Optimization of vermicompost utilization of soil worms (Lumbricus rubellus) on the morphology green spinach (Amaranthus sp.) Nanda Agnes Santika; Vivi Indriani
Jurnal Online Pertanian Tropik Vol. 13 No. 2 (2026): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jopt.v13i2.24549

Abstract

Vermicompost is a fertilizer produced by composting organic waste with the help of earthworms that can fertilize the soil. Vermicompost has the measure of being beneficial for plant growth. This study aims to determine the effectiveness of vermicompost levels of worms (Lumbricus rubellus) against green spinach plants. The experimental design used was a completely randomized design (CRD) with a factorial pattern (4x3). Factor A is the level of vermicompost (0%, 5%, 10%, and 15%) based on the media and factor B is inorganic fertilizer (0%, 50%, 100%) based on the recommendation each with 5 repetitions. The quality of vermicompost products from the earthworm L. rubellus derived from cow dung has met the quality standards of solid organic fertilizers. The optimum level for the growth of green spinach (Amaranthus sp) is a combination of 10% vermicompost and 50% inorganic fertilizer levels. The addition of vermicompost fertilizer to plant media was able to increase plant vegetative growth which included plant height, number of leaves, leaf area, stem diameter of green spinach (Amaranthus sp).

Page 39 of 39 | Total Record : 389

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