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Benny Hidayat
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INDONESIA
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 384 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.

Page 39 of 39 | Total Record : 384

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