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Pebra Heriansyah
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Faculty of Agricultural Sciences, Islamic University of Kuantan Singingi Campus Kebun Nenas, Jake Jl. Gatot Subroto KM. 7. Kebun Nenas Jake, Kuantan Singingi, Riau Indonesia 29566
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INDONESIA
Jurnal Agronomi Tanaman Tropika (JUATIKA)
Published by Universitas Islam Kuantan Singingi
ISSN : 2684785X     EISSN : 26561727     DOI : https://doi.org/10.36378/juatika.v7i1
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Jurnal Agronomi Tanaman Tropika (JUATIKA) contains original articles of research, review article/literature review in Agronomy, Plant Protection, and Soil Science
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Agronomi dan Ilmu Tanaman
Articles 213 Documents
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Influence Concentration and Immersion Time, Substance Regulator Growth of IBA (Indole-3-Butyric Acid) Against Early Seedling Growth Cuttings, Plant Jasmine White (Jasminum sambac) Fajri, Ridwan; Triani, Nova; Nugrahani, Pangesti
JURNAL AGRONOMI TANAMAN TROPIKA (JUATIKA) Vol. 8 No. 2 (2026): Jurnal Agronomi Tanaman Tropika (JUATIKA) Vol. 8 No. 2 Mei 2026
Publisher : LPPM UNIVERSITAS ISLAM KUANTAN SINGINGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36378/juatika.v8i2.5416

Abstract

White jasmine (Jasminum sambac (L.) Aiton) is an ornamental plant of high economic value that requires access to quality, uniform seeds. Propagation through stem cuttings often faces challenges in root formation and initial growth. This study aims to analyze the effects of Indole-3-Butyric Acid (IBA) concentration and soaking time on the initial growth of white jasmine cuttings. The study employed a factorial completely randomized design with two factors: IBA concentration (0, 50, 100, and 150 parts per million) and soaking time (30, 60, and 90 minutes). The parameters observed included shoot emergence time, shoot length, number of leaves, number of primary roots, and root fresh weight. Data were analyzed using analysis of variance at a 5% significance level. The results showed a significant interaction between concentration and soaking time for all parameters. The combination of 100 ppm IBA with a 60-minute soaking time resulted in the fastest shoot emergence (11.27 days), the longest shoot length at eight weeks after planting (11.27 cm), the highest number of leaves (12.60), the greatest number of primary roots (12.52), and the largest fresh root weight (1.06 g). Treatments without growth regulators showed the lowest values for most parameters. Thus, a concentration of 100 ppm with a 60-minute soaking time was the most effective combination for enhancing the initial growth of white jasmine cuttings. Applying this treatment has the potential to improve seedling quality and uniformity, supporting the development of white jasmine cultivation.
Vegetative Response of Cocoa Seedlings (Theobroma cacao L.) to Nitrophenol Compound Concentration and NPK Fertilizer Dose Kusmiati; Sutrisno, Eko; Away, Sischa Febriani Yamesa; Chairunnisa, Putri
JURNAL AGRONOMI TANAMAN TROPIKA (JUATIKA) Vol. 8 No. 2 (2026): Jurnal Agronomi Tanaman Tropika (JUATIKA) Vol. 8 No. 2 Mei 2026
Publisher : LPPM UNIVERSITAS ISLAM KUANTAN SINGINGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36378/juatika.v8i2.5469

Abstract

Cocoa is a vital plantation commodity in Indonesia, but its productivity is hindered by suboptimal seedling quality. This study aimed to evaluate the vegetative growth response of cocoa seedlings to various combinations of nitrophenol compound concentrations and NPK fertilizer doses, and to identify the optimal treatment combination. The experiment was conducted at the Experimental Garden of the Faculty of Agriculture, Pasir Pengaraian University, Riau, from June to October 2025, using a Randomized Complete Block Design (RCBD) with a factorial arrangement. The first factor was the concentration of nitrophenol compounds (0, 1.5, 3.0, and 4.5 ml/L), and the second factor was the NPK fertilizer dose (0, 5, and 10 g per polybag). The parameters measured included plant height, stem diameter, leaf number, root volume, and dry weight. Data were statistically analyzed using an F-test (ANOVA) at the 5% significance level with PKBT-STAT 3.2, followed by the Honestly Significant Difference (HSD) test at the 5% level. The results indicated a highly significant interaction (P < 0.01) between nitrophenol compounds and NPK fertilizer on all measured parameters. The combination of 4.5 ml/L nitrophenol compounds and 10 g/polybag NPK fertilizer produced the best results, with a plant height of 46.00 cm, 17 leaves, a stem diameter of 0.69 cm, a root volume of 6.50 ml, and a dry weight of 4.38 g. These findings demonstrate that increasing both the concentration of the nitrophenol compound and the fertilizer dose synergistically enhances the vigor and quality of cocoa seedlings.
Contribution Biopellets as Energy New Renewable from Stalks, Bunches, Waste, Fresh Fruit Bunches, and Shells Coconut (Cocos nucifera) Meysi Afrilia F, Brefty; Yosephine , Ingrid Ovie; Giyanto
JURNAL AGRONOMI TANAMAN TROPIKA (JUATIKA) Vol. 8 No. 2 (2026): Jurnal Agronomi Tanaman Tropika (JUATIKA) Vol. 8 No. 2 Mei 2026
Publisher : LPPM UNIVERSITAS ISLAM KUANTAN SINGINGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36378/juatika.v8i2.5502

Abstract

Indonesia is the world's largest producer of coconut palm oil, with a total production of 46,986,128 tons in 2023, cultivated over 16,833,985 hectares. This research aims to utilize waste from harvesting fresh fruit bunches (FFB) of coconut palm oil—specifically, bunch stalks and coconut shells—as raw materials for the manufacture of biopellets. Additionally, the study evaluates the influence of varying compositions on the quality characteristics of biopellets, including calorific value, moisture content, ash content, density, and combustion rate. The research employed an experimental method using a Completely Randomized Design (CRD) with a non-factorial arrangement. The treatments consisted of five composition levels of fresh fruit bunches to coconut shell ratios: 100% FFB: 0% shell (K1), 75%: 25% (K2), 50%: 50% (K3), 25%: 75% (K4), and 0%: 100% (K5). Each treatment was replicated three times. The study stages included raw material preparation, chopping, drying of TBS stalks, milling to a particle size of 30 mesh (<0.6 mm), mixing with coconut shell using an adhesive made from gaplek/tapioca flour, pelletizing, drying in an oven at 80°C for 1 hour, and subsequent quality testing according to research parameters. Results indicate that the proportion of coconut shell significantly affects the biopellet characteristics. The highest calorific value was observed in treatment K5 (100% shell) at 3,924.24 cal/g, while the lowest was in K1 (100% FFB) at 3,226.64 cal/g. All treatments met the SNI 8675:2018 standard for moisture content, with the lowest at 5.47% in K5 and the highest at 6.60% in K2. However, ash content across all treatments did not meet the SNI standard, ranging from 22.80% to 36.13%. Biopellet density met the standard, averaging 0.73 g/cm³, and the combustion rate also complied with the standard, averaging 0.00096 g/second. In conclusion, substituting coconut shell for fresh fruit bunch stalks increases the calorific value and improves several quality parameters of biopellets, with the best results observed in treatment K5 for calorific value and moisture content.

Page 22 of 22 | Total Record : 213

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