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All Journal Jurnal Biologi Tropis
Liana Suryaningsih B.
Universitas Mataram
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology

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Effect of Goat Manure Dosage and Watering Frequency on Growth and Yield (Brassica juncea L.) Aerobic System Devy Cahyani; Liana Suryaningsih B.; A. A. K. Sudharmawan
Jurnal Biologi Tropis Vol. 26 No. 4 (2026): in Progress
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i4.13445

Abstract

Green mustard (Brassica juncea L.) is an economically valuable leafy vegetable, yet its productivity in Indonesia has declined due to excessive use of inorganic fertilizer and inadequate water management. This study aimed to determine the effects of goat manure organic fertilizer dose and watering frequency, both individually and in combination, on the growth and yield of mustard grown under an aerobic cultivation system. Using a factorial randomized block design with two factors—goat manure dose (0, 10, and 20 tons per hectare) and watering frequency (daily, every two days, and every three days) the experiment was carried out in Nyurlembang Village, West Lombok Regency. Nine treatment combinations were replicated three times across 27 experimental plots. Plant height, leaf number, leaf area, fresh weight, and dried weight were among the characteristics noted. According to the findings, watering every two days consistently resulted in the best growth in plant height, leaf number, and leaf area, while a fertilizer dose of 20 tons per hectare provided the highest plant height and leaf area at the final observation stage. Although the interaction between the two factors was not statistically significant, the combination of the highest fertilizer dose with watering every two days descriptively showed the best performance, indicating a practical synergy between nutrient availability and water sufficiency. It can be concluded that appropriate management of organic fertilizer dose and watering frequency can serve as an efficient and environmentally friendly cultivation strategy for mustard under an aerobic system.
Mustard Physiological Response, Yield Quality to Mulch Type, Goat Manure Dose in Aerobic Cultivation Raden Deden Saputra; Liana Suryaningsih B.; A. A. K. Sudharmawan
Jurnal Biologi Tropis Vol. 26 No. 4 (2026): in Progress
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i4.13450

Abstract

Mustard greens (Brassica juncea L.) are an important vegetable commodity, but their productivity may be constrained by intensive dependence on synthetic fertilizers and suboptimal soil management. This study aimed to analyze the effects of mulch type, goat manure organic fertilizer dosage, and their interaction on the physiological response and yield quality of mustard greens under an aerobic cultivation system. The study used a factorial randomized block design with two factors: mulch type, consisting of no mulch, silver-black plastic mulch, and straw mulch, and goat manure dosage of 0, 10, and 20 tons ha⁻¹. Each treatment combination was replicated three times, resulting in 27 experimental units. The observed parameters included soil temperature, soil moisture, leaf chlorophyll content, fresh weight, dry weight, and root length. The results showed that mulch type significantly affected most physiological parameters. Silver-black plastic mulch produced the highest soil moisture and leaf chlorophyll content, whereas straw mulch resulted in the longest roots. Goat manure dosage significantly affected soil temperature and soil moisture at specific observation periods. The interaction between mulch type and goat manure dosage significantly affected root length, whereas fresh weight and dry weight were not significantly affected by either factor or their interaction. These findings indicate that mulch type plays an important role in modifying the soil microenvironment and physiological response of mustard greens, while goat manure dosage contributes to changes in soil conditions under aerobic cultivation.
The Effect of Urea Fertilizer Doses and Growing Media on the Growth and Yield of Pakcoy (Brassica rapa subsp. chinensis) Laely Amelia; Liana Suryaningsih B.; Anjar Pranggawan Azhari
Jurnal Biologi Tropis Vol. 26 No. 4 (2026): in Progress
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i4.13459

Abstract

Pakcoy (Brassica rapa subsp. chinensis L.) is a leafy vegetable whose growth and yield are influenced by growing media and nitrogen availability. This study aimed to determine the effects of growing media, urea fertilizer doses, and their interaction on the growth and yield of pakcoy. The experiment was conducted in Presak Timur, Mataram, West Nusa Tenggara, from May to June 2026, using a 2 × 5 factorial Completely Randomized Design with three replications. The first factor was growing media, namely soil + rice husk (1:1, v/v) and soil + cocopeat (1:1, v/v), while the second factor was urea dose of 0, 0.50, 0.75, 1.00, and 1.25 g/polybag. Data were analyzed using analysis of variance at a 5% significance level When significant effects were found, Tukey's Honestly Significant Difference test was used. The findings demonstrated that compared to soil + rice husk, soil + cocopeat generally produced higher plant height, leaf number, and leaf area. Plant height, leaf number, leaf area, root length, fresh weight, and dry weight were all greatly impacted by urea, with 1.00 g/polybag typically yielding the greatest results. Plant height at 14–28 days after planting, leaf number at 35 days, fresh weight, and dry weight all showed significant relationships. The highest fresh weight (90.99 g) and dry weight (9.01 g) were produced by the M2D3 combination (soil + cocopeat + 1.00 g urea/polybag). Therefore, in order to support pakcoy development and biomass production under the experimental conditions, soil + cocopeat mixed with 1.00 g urea/polybag is advised.
The Effect of Growing Media Combinations and KNO₃ Fertilizer Doses on The Growth and Yield of French Breakfast Radish (Raphanus sativus L.) Nova Handa Utami; Liana Suryaningsih B.; I Gusti Putu Muliarta Aryana
Jurnal Biologi Tropis Vol. 26 No. 4 (2026): in Progress
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i4.13460

Abstract

Radish (Raphanus sativus L.) is a horticultural crop with potential for urban farming, but its performance is influenced by growing media characteristics and nutrient availability. This study aimed to analyze the effects of growing media, KNO₃ fertilizer doses, and their interaction on the growth and yield of French Breakfast radish grown in polybags. The study was conducted from May to July 2026 using a factorial Completely Randomized Design with two growing media, namely soil + rice husk and soil + sand, and four KNO₃ doses (0, 0.75, 1.50, and 2.25 g polybag⁻¹), with four replications. Data were analyzed using analysis of variance followed by the 5% HSD test. The results showed a significant interaction between growing media and KNO₃ dose on leaf number growth rate and leaf number at 28 days after planting (DAP). The combination of soil + rice husk and 0.75 g KNO₃ polybag⁻¹ produced the highest values, at 0.21 leaves day⁻¹ and 7.75 leaves, respectively. Growing media significantly affected leaf number at 14 DAP and shoot-to-root ratio, while KNO₃ significantly affected fresh plant weight based on ANOVA. No significant effects were observed on tuber yield components. These findings imply that soil + rice husk combined with 0.75 g KNO₃ polybag⁻¹ may support vegetative growth, but cannot yet be recommended as an optimum treatment for increasing tuber yield.
Effect of Moringa Leaf Extract Concentration as A Biostimulant on Pakcoy (Brassica rapa subsp. chinensis) Growth and Yield Putri Aulia Zahra; Liana Suryaningsih B.; Jayaputra Jayaputra
Jurnal Biologi Tropis Vol. 26 No. 4 (2026): in Progress
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i4.13472

Abstract

Pakcoy (Brassica rapa subsp. chinensis) is a short-cycle leafy vegetable with high economic value, so improving productivity through environmentally friendly inputs is important. This study aimed to determine the effect of Moringa oleifera leaf extract as a biostimulant on pakcoy growth and yield and to identify the most effective concentration. The experiment was conducted in Presak Timur, Pagutan, Mataram, using a Completely Randomized Design with five concentrations: 0% (K0), 4% (K1), 8% (K2), 12% (K3), and 16% (K4), with seven replications. Observations included plant height and leaf number at 7, 14, 21, 28, and 35 days after planting, as well as leaf area, fresh weight, dry weight, and root length at harvest. Data were analyzed by analysis of variance followed by the 5% Honestly Significant Difference (BNJ) test for significant effects. Moringa leaf extract significantly affected plant height at all observation times, leaf number from 21 days after planting onward, leaf area, fresh weight, dry weight, and root length. The 4% concentration generally produced the best vegetative response, particularly for plant height and leaf number, while 8% produced the highest fresh and dry weights. These results indicate that 4–8% was the most promising concentration range under the experimental conditions.
Co-Authors A. A. Ketut Sudharmawan Anjar Pranggawan Azhari Devy Cahyani I Gusti Putu Muliarta Aryana Jayaputra Jayaputra Laely Amelia Nova Handa Utami Putri Aulia Zahra Raden Deden Saputra