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INDONESIA
Jurnal Biologi Tropis
Published by Universitas Mataram
ISSN : 14119587     EISSN : 25497863     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology
Jurnal Biologi Tropis (ISSN Cetak 1411-9587 dan ISSN Online 2549-7863) diterbitkan mulai tahun 2000 dengan frekuensi 2 kali setahun oleh Program Studi Pendidikan Biologi PMIPA FKIP Universitas Mataram, berisi hasil penelitian dan ulasan Ilmiah dalam bidang Biologi Sains.
Arjuna Subject : -
Articles 2,520 Documents
 181   182   183   184   185 
Influence of Tithonia POC and Nano Bubble Technology on Hydroponic Pakcoy (Brassica rapa L.) Quality Alqaramah, Rachel; Fevria, Resti; Vauzia, Vauzia; Razak, Abdul
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
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.v25i2.8782

Abstract

Hydroponics offers a modern agricultural solution to overcome land limitations in urban settings. Despite its advantages, the system commonly relies on synthetic fertilizers like AB Mix, which are costly and may pose environmental risks. As a sustainable alternative, liquid organic fertilizer (POC) derived from Tithonia diversifolia, combined with nanobubble technology, may improve nutrient uptake efficiency in plants. This study aimed to evaluate the effect of combining AB Mix and nano POC on the growth of pakcoy (Brassica rapa L.) in a nanobubble-based hydroponic system. A Completely Randomized Design (CRD) was used with five treatments and five replicates: P1 (100% AB Mix), P2 (75% AB Mix + 25% nano POC), P3 (50% AB Mix + 50% nano POC), P4 (25% AB Mix + 75% nano POC), and P5 (100% nano POC). The measured variables were plant height, leaf number, leaf area, fresh weight, and dry weight. ANOVA and Duncan’s 5% test showed that P2 resulted in the best growth, while P5 had the lowest. These results indicate that nano POC is effective as a supplementary nutrient but cannot fully replace inorganic fertilizers. Further research is necessary to determine the optimal composition and its influence on plant quality.
A Decade Review of Dinoflagellate Species Composition in Lombok Waters, West Nusa Tenggara: Threat or Blessing Mujib, Abd. Saddam; Dermawan, Awan
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
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.v25i2.8786

Abstract

Armiani, S. (2021). Komposisi dan Kelimpahan Jenis Fitoplankton di Perairan Pelabuhan Carik Kecamatan Bayan Kabupaten Lombok Utara. Jurnal Ilmiah Pendidikan Sains Dan Terapan, 1(1), 75–80. Asefi, M. A., & Attaran-Fariman, G. (2022). A Review of the Biotoxin of Marine Dinoflagellates; Mechanism of Action, Methods of Analysis, and Effects of These Toxins on the Environment and Human. Journal of Marine Medicine Spring, 2022(1), 68–78. https://doi.org/10.30491/4.1.68 A Asri, Y., Cokrowati, N., Sumsanto, M., & Diniariwisan, D. (2024). Abundance Index And Community Structure Of Phytoplankton In The Integrated Marine Aquaculture Area Of Ekas Bay , West Nusa Tenggara. Jurnal Perikanan, 14(4), 2116–2125. https://doi.org/http://doi.org/10.29303/jp.v14i4.1256 Ayache, N., Bill, B. D., Brosnahan, M. L., Campbell, L., Deeds, J. R., Fiorendino, J. M., Gobler, C. J., Handy, S. M., Harrington, N., Kulis, D. M., McCarron, P., Miles, C. O., Moore, S. K., Nagai, S., Trainer, V. L., Wolny, J. L., Young, C. S., & Smith, J. L. (2023). A survey of Dinophysis spp. and their potential to cause diarrhetic shellfish poisoning in coastal waters of the United States. Journal of Phycology, 59(4), 658–680. https://doi.org/10.1111/jpy.13331 Baek, S. H., Shimode, S., Han, M. S., & Kikuchi, T. (2008). Growth of dinoflagellates, Ceratium furca and Ceratium fusus in Sagami Bay, Japan: The role of nutrients. Harmful Algae, 7(6), 729–739. https://doi.org/10.1016/j.hal.2008.02.007 Barber-Lluch, E., Nieto-Cid, M., Santos-Echeandía, J., & Sánchez-Marín, P. (2023). Effect of dissolved organic matter on copper bioavailability to a coastal dinoflagellate at environmentally relevant concentrations. Science of the Total Environment, 901(May). https://doi.org/10.1016/j.scitotenv.2023.165989 Basti, L., Uchida, H., Matsushima, R., Watanabe, R., Suzuki, T., Yamatogi, T., & Nagai, S. (2015). Influence of temperature on growth and production of pectenotoxin-2 by a monoclonal culture of Dinophysis caudata. Marine Drugs, 13(12), 7124–7137. https://doi.org/10.3390/md13127061 Bui, Q. T. N., Kim, H., Park, H., & Ki, J. S. (2021). Salinity affects saxitoxins (Stxs) toxicity in the dinoflagellate alexandrium pacificum, with low transcription of sxt-biosynthesis genes sxta4 and sxtg. Toxins, 13(10). https://doi.org/10.3390/toxins13100733 Carnicer, O., Irwin, A. J., & Finkel, Z. V. (2022). Traits influence dinoflagellate C:N:P. European Journal of Phycology, 57(2), 154–165. https://doi.org/10.1080/09670262.2021.1914860 Coyne, K. J., Salvitti, L. R., Mangum, A. M., Ozbay, G., Main, C. R., Kouhanestani, Z. M., & Warner, M. E. (2021). Interactive effects of light, CO2 and temperature on growth and resource partitioning by the mixotrophic dinoflagellate, Karlodinium veneficum. PLoS ONE, 16(10 October), 1–20. https://doi.org/10.1371/journal.pone.0259161 Dolatabadi, F., Attaran-Fariman, G., & Loghmani, M. (2021). Bloom occurrence and phylogeny of Gonyaulax polygramma (Dinophyceae) isolated from south east coast of Iran (Oman Sea). Iranian Journal of Fisheries Sciences, 20(6), 1789–1803. https://doi.org/10.22092/ijfs.2021.125501 Dong, S., Lei, Y., Bi, H., Xu, K., Li, T., & Jian, Z. (2022). Biological Response of Planktic Foraminifera to Decline in Seawater pH. Biology, 11(1), 1–12. https://doi.org/10.3390/biology11010098 Fathurrahman, & Aunurohim. (2014). Kajian Komposisi Fitoplankton dan Hubungannya dengan Lokasi Budidaya Kerang Mutiara (Pinctada Maxima) di Perairan Sekotong, Nusa Tenggara Barat. Teknik Pomits, 3(2), 93–98. Fernández, R., Mamán, L., Jaén, D., Fuentes, L. F., Ocaña, M. A., & Gordillo, M. M. (2019). Dinophysis species and diarrhetic shellfish toxins: 20 years of monitoring program in andalusia, south of spain. Toxins, 11(4). https://doi.org/10.3390/toxins11040189 Fitriyah, A., Zainuri, M., & Indriyawati, N. (2022). Perbedaan dan Hubungan Nitrat, Fosfat Dengan Kelimpahan Fitoplankton Pada Saat Air Pasang dan Surut di Muara Ujung Piring Bangkalan. Jurnal Kelautan: Indonesian Journal of Marine Science and Technology, 15(1), 60–68. https://doi.org/10.21107/jk.v15i1.13990 Funaki, C., Kuwata, K., Lum, W. M., Takahashi, K., Iwataki, M., & Takahashi, K. (2024). Effects of temperature and light intensity on growth in Prorocentrum cf . balticum ( Dinophyceae ) isolated from the Oyashio-Kuroshio Mixed Water region , North Pacific. Plankton and Benthos Research, 19(4), 191–202. https://doi.org/10.3800/pbr.19.191 Graeff, J. E., Elkins, L. C., Leblond, J. D., Graeff, J. E., Elkins, L. C., & Leblond, J. D. (2021). Plastid-associated galactolipid composition in eyespot-containing dinoflagellates: a review. Algae, 36(2), 73–90. https://doi.org/https://doi.org/10.4490/algae.2021.36.5.25 Iskandar, I., Sukoco, N. B., Kamija, K., & Pranowo, W. S. (2022). Karakteristik Termoklin dan Kecepatan Suara di Selat Lombok Berdasarkan Filtering data CTD Menggunakan Analysis Toolpak. Jurnal Chart Datum, 4(1), 43–50. https://doi.org/10.37875/chartdatum.v4i1.3 Ismunarti, D. H., & Baskoro, R. (2013). Kajian Pola Arus Di Perairan Nusa Tenggara Barat Dan Simulasinya Menggunakan Pendekatan Model Matematik. Buletin Oseanografi Marina, 2, 5–6. Kesaulya, I., Rumohoira, D. R., & Saravanakumar, A. (2022). The Abundance of Gonyaulax polygramma and Chaetoceros sp. Causing Blooming in Ambon Bay, Maluku. Ilmu Kelautan: Indonesian Journal of Marine Sciences, 27(1), 13–19. https://doi.org/10.14710/ik.ijms.27.1.13-19 Mahmudi, M., Arsad, S., Lusiana, E. D., Musa, M., Fitrianesia, F., Ramadhan, S. F., Arif, A. R., Savitri, F. R., Dewinta, A. A., & Ongkosongo, A. D. (2023). Microalgae diversity in varying habitat characteristics in Pasuruan and Sidoarjo coastal areas, East Java, Indonesia. Biodiversitas, 24(8), 4418–4426. https://doi.org/10.13057/biodiv/d240823 Matsubara, T., Nagasoe, S., Yamasaki, Y., Shikata, T., Shimasaki, Y., Oshima, Y., & Honjo, T. (2007). Effects of temperature, salinity, and irradiance on the growth of the dinoflagellate Akashiwo sanguinea. Journal of Experimental Marine Biology and Ecology, 342(2), 226–230. https://doi.org/10.1016/j.jembe.2006.09.013 Mujib, A. S., Damar, A., & Wardiatno, Y. (2015). Spatial Distribution of Planktonic Dinoflagellate in Makassar Waters, South Sulawesi. Jurnal Ilmu Dan Teknologi Kelautan Tropis, 7, 479–492. Park, S. A., Jeong, H. J., Ok, J. H., Kang, H. C., You, J. H., Eom, S. H., Du Yoo, Y., & Lee, M. J. (2024). Effect of salinity on the bioluminescence intensity of the heterotrophic dinoflagellates Noctiluca scintillans and Polykrikos kofoidii and the autotrophic dinoflagellate Alexandrium mediterraneum. Marine Biology, 171(6), 1–19. https://doi.org/10.1007/s00227-024-04440-3 Paulette, A. M. (2023). Phycotoxins Dynamic from San-Pedro Port Area and their Potentials Associated Risks. European Journal of Applied Science, 11(5), 121–131. https://doi.org/10.14738/aivp.115.15187 Perkins, J. C., Zenger, K. R., Kjeldsen, S. R., Liu, Y., & Strugnell, J. M. (2025). Assessment of dinoflagellate diversity using DNA metabarcoding reveals toxic dinoflagellate species in Australian coastal waters. Marine Pollution Bulletin, 210(November 2024), 117319. https://doi.org/10.1016/j.marpolbul.2024.117319 Purnamaningtyas, S. E. (2019). Distribusi dan Kelimpahan Fitoplankton di Teluk Gerupuk, Nusa Tenggara Barat. Akuatika Indonesia, 4(1), 24. https://doi.org/10.24198/jaki.v4i1.23431 Radiarta, I. N., Erlania, E., & Ketut Sugama, K. S. (2015). Analisis Spasial Dan Temporal Komunitas Fitoplankton Sekitar Budidaya Laut Terintegrasi Di Teluk Ekas, Nusa Tenggara Barat. Jurnal Riset Akuakultur, 10(2), 283. https://doi.org/10.15578/jra.10.2.2015.283-291 Sathishkumar, R. S., Sahu, G., Mohanty, A. K., Arunachalam, K. D., & Venkatesan, R. (2021). First report of Protoperidinium steinii (Dinophyceae) bloom from the coastal marine ecosystem – an observation from tropical Indian waters. Oceanologia, 63(3), 391–402. https://doi.org/10.1016/j.oceano.2021.04.003 Sherr, E. B., & Sherr, B. F. (2007). Heterotrophic dinoflagellates: A significant component of microzooplankton biomass and major grazers of diatoms in the sea. Marine Ecology Progress Series, 352, 187–197. https://doi.org/10.3354/meps07161 Syaufullah, M. D. (2015). Analisis Suhu Permukaan Laut Perairan Indonesia...Pemanasan Global (Syaifullah. Jurnal Segara, 11(1), 37–47. http://rda.ucar.edu/datasets/ Watras, C. J., Chisholm, S. W., & Anderson, D. M. (1982). Regulation of growth in an estuarine clone of Gonyaulax tam arensis Lebour: Salinity-dependent temperature responses. Journal of Experimental Marine Biology and Ecology, 62(1), 25–37. https://doi.org/10.1016/0022-0981(82)90214-3 Ye, M. H., Li, D. W., Cai, Q. D., Jiao, Y. H., Liu, Y., Li, H. Y., & Yang, W. D. (2022). Toxic Responses of Different Shellfish Species after Exposure to Prorocentrum lima, a DSP Toxins Producing Dinoflagellate. Toxins, 14(7). https://doi.org/10.3390/toxins14070461
Morphometric Analysis of Seagrass Halophila ovalis in the Coastal Waters of Manokwari Kilmaskossu, Johanis Paulus; Sianipar, Fajar Ria Dwi Natalia; Susanto, Slamet Arif; Lefaan, Paskalina Theresia; Manangkalangi, Emmanuel; Maturbongs, Agatha Cecilia
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
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.v25i2.8797

Abstract

Pressure on coastal water conditions in Manokwari caused by human activities can affect the morphometric adaptation of seagrass plants, one of which is Halophila ovalis. The study aimed to analyze the morphometric differences of Halophila ovalis caused by differences in environmental factors on several coastal areas in Manokwari. A total of 20 samples of H. ovalis were taken from each of the beaches studied and then four morphological characters were measured. Morphometric data of H. ovalis between locations were analyzed using analysis of variance (ANOVA), then continued with non-multidimensional scaling (NMDS) analysis. The results showed that there were changes in the morphometrics of H. ovalis from the four research locations. Specifically, it was found that the H. ovalis with the most different morphology came from Rendani Beach. NMDS analysis shows that the morphometrics of H. ovalis on Rendani Beach are separate from  from Yenkarwar, Wosi and Saubeba Beaches. The NMDS model was explain 74.19% of the morphometric diversity influenced by environmental parameters such as water temperature, substrate conditions, pH, salinity, and dissolved oxygen levels. We concluded that there had been morphometric changes in the seagrass H. ovalis in several coastal waters in Manokwari.
Antioxidant Effect in Nasopharyngeal Cancer Histopathology Degree on 40 PPM Formaldehyde-Inducted Rattus novergicus Wibawa, Putu Arta; Wedayani, Anak Agung Ayu Niti; Prihatina, Lale Maulin; Yuliani, Eka Ari; Pratiwi, Sekar
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
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.v25i2.8805

Abstract

Formaldehyde exposure, implicated on the development of nasopharyngeal cancer (NPC), remains a significant concern worldwide, with increasing incidence, morbidity, and mortality cases. This study eager to investigate the antioxidant effect on degree of histopathology from formaldehyde exposure, assessing nasopharyngeal dysplasia progression toward malignancy. Rattus norvegicus divided equally into four groups: control, placebo, formaldehyde-induced (40 PPM), and formaldehyde-induced with antioxidant, followed by dysplasia degree examination under light microscope. The result revealed severe dysplasia in the formaldehyde group, indicating non-keratinizing squamous cell carcinoma. Additionally, antioxidant-treated group presented reduced severity, with lower degree of dysplasia. This result is indicating positive improvement of antioxidant effect toward NPC malignancy, supporting previous studies and further confirming genotoxicity and irritability of formaldehyde. Nevertheless, limitations, existed with lack of sample studied and dose-response analysis, were demanding deeper study need to be done.
Relationship Between Patients with Hypertension Stage 2 and Chronic Kidney Disease (CKD) at Harapan Keluarga Hospital Octivani, Fania; Arsatt, Maz Isa Ansyori; Maulana, Akhada; Wedayani, Anak Agung Ayu Niti
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
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.v25i2.8806

Abstract

Hypertension and chronic kidney disease (CKD) are interrelated global health challenges with rising prevalence, particularly in low-resource settings such as Indonesia. This retrospective cohort study aimed to investigate the association between hypertension stage 2 and CKD among 65 patients treated at Harapan Keluarga Hospital between 2023 and 2024. Data were obtained through medical record reviews, and statistical analysis was conducted using Chi-square testing and odds ratio (OR) calculations. A significant association was found between stage 2 hypertension and CKD (p = 0.001), although the OR value of 0.888 (95% CI: 0.821–0.920) suggests a negative correlation, potentially influenced by variations in treatment adherence, demographic characteristics, or other confounding factors. Differences in BMI and blood pressure between male and female patients were also observed, highlighting the role of sex-specific physiological and lifestyle variables in disease progression. The findings emphasize the importance of tailored clinical management strategies for hypertensive patients to prevent CKD progression, particularly in healthcare settings with limited diagnostic and therapeutic resources.
The Knowledge Level of Elderly in Puskesmas Taliwang and the Incidence of Chronic Kidney Disease in 2024 Cahyani, Aulia Putri; Maulana, Akhada; Arsatt, Maz Isa Ansyori; Wedayani, Anak Agung Ayu Niti
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
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.v25i2.8813

Abstract

Chronic Kidney Disease (CKD) is a gradually progressing condition that frequently remains asymptomatic in it’s early stages, making it an increasingly significant public health concern, particularly among the elderly. Early awareness and preventive behavior are crucial to mitigate it’s impact, yet many elderly individuals lack sufficient knowledge about disease. This study aims to examine the relationship between the knowledge level of elderly individuals and the incidence of CKD in the Puskesmas Taliwang area in 2024. A cross-sectional analytical study was conducted involving 30 elderly participants selected through simple random sampling. Data on knowledge level were collected using a structured was performed using the Chi-square test. The result showed a significant association was found between knowledge level and CKD incidence P-value=0.000 and OR value is between 0,900 and 1,020, indicating that lower knowledge correlates with a higher risk of CKD. There is a significant relation between the knowledge level of elderly individuals and the incidence of CKD in the Puskesmas Taliwang area. Strengthening educational outreach and awareness programs is essential to reduce CKD risk among the elderly.
Isolation Endophyte Bacteria from Keladi Merah (Caladium bicolor L.) as Activity Potential Antimicroba Utami, Anggraini Putri; Khairillah, Yuyun Nisaul; Jagad, Nur Jati; Ramanda, Galih Dwiki
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
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.v25i2.8814

Abstract

Since endophytic bacteria are known to generate bioactive substances with possible antibacterial qualities, they present a viable substitute for antibiotics in the fight against antibiotic resistance, especially in harmful bacteria like Staphylococcus aureus. This study aimed to isolate and identify potential endophytic bacteria from red caladium plants (Caladium bicolor L.) and evaluate their antimicrobial activity against S. aureus, a Gram-positive bacterium notorious for its antibiotic resistance. The research was conducted using the disc diffusion method to assess the inhibitory effects of endophytic bacterial isolates on S. aureus growth. The results revealed varying levels of antimicrobial activity among the isolates, with isolate CLB242 demonstrating an average inhibition zone of 16.33 mm, isolate CLB244 showing an average of 17.6 mm, and isolate CLB245 showed an inhibition zone of 4 mm. Meanwhile, other isolates did not produce any inhibition zones, suggesting possible resistance or undetectable active compounds. Certain endophytic bacterial isolates from Caladium bicolor L. exhibit promising antimicrobial activity against S. aureus, highlighting their potential as sources of novel antimicrobial agents. Further research is recommended to identification of the active isolates molecular profiles and characterization of their bioactive compounds responsible for the observed antimicrobial effects, as well as to explore their mechanisms of action and potential applications in pharmaceutical development.
Characterization of Immobilized Cell Alginate Beads of Mudiak Sapan (MS) Isolates Producing Bioelectricity Maulina, Adinda Rizky; Irdawati, Irdawati
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
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.v25i2.8826

Abstract

Bacterial immobilization is the coating or capture of bacteria with organic or inorganic compounds, by binding to the matrix through chemical binding or physically holding it in the cavity of the supporting material, so that bacteria can survive better in less adaptive environmental conditions and can still carry out their metabolism. This study aims to see the characterization of beads produced from the immobilization of the best thermophilic bacterial isolates (MS 9, 12, 17, and 18) isolated from the Mudiak Sapan hot air source. Bacterial immobilization was carried out by the trapping method using 5% alginate and analyzed descriptively. Beads were made by mixing 5% Na-Alginate solution with bacterial isolates, then dripped into 0.2 M CaCl₂. Bead characteristics were observed based on shape, color, and diameter. The results showed that at a concentration of 5% alginate produced beads that tended to be round and rotten white in color with the number of bacterial colonies ranging from 107x101 to 137x101 .
Characterization of Alginate Beads from Biolectric Producing Thermophilic Bacterial Cells Andriani, Putri; Irdawati, Irdawati
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
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.v25i2.8828

Abstract

Cell immobilization is one of the important techniques in biotechnology to increase the stability and viability of microorganisms during the application process. This study aims to characterize the shape, color, size, and number of colonies of beads resulting from the immobilization of four electrogenic thermophilic bacterial isolates (SSA1, SSA8, SSA14, and SSA16) using sodium alginate as a matrix. The immobilization technique was carried out through the ionic gelation method using 0.2 M CaCl₂, with a concentration of 5% sodium alginate. The results showed that all isolates formed beads with round morphology and clear yellowish color indicating the success of the gelation process and no contamination. The diameter of the beads ranged from 3.8 mm to 4.6 mm, with SSA16 having the largest size. The highest number of colonies was found in SSA14 (147 colonies), followed by SSA16 (140), SSA1 (138), and SSA8 (125). There was a positive correlation between the size of the beads and the number of colonies, indicating that isolates with larger matrix space could accommodate more cells without interfering with metabolic activity. These results suggest that SSA14 and SSA16 have the most optimized physical characteristics of beads for application in Microbial Fuel Cell (MFC) systems.
Effect of Nanobubble Technology Gamal Leaf POC on Pakcoy (Brassica rapa L.) Quality in Hydroponic Tazri, Mufidah Insani; Fevria, Resti; Vauzia, Vauzia; Razak, Abdul
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
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.v25i2.8829

Abstract

Pakcoy (Brassica rapa L.) production in Indonesia has declined due to limited land and reliance on costly inorganic fertilizer such as ABmix. Therefore, alternative fertilizer that are more efficient and enviromentally friendly are needed. This study aimed to eximine the effects of the liquid organic fertilizer (POC) made from gamal leaves (Gliricidia sepium Jacq. Kunth) using nano bubble technology on the growth and quality of pakcoy in a hydroponic system. A Completely Randomized Design (CRD) was used with five treatments: P1 (100% ABmix), P2 (75% ABmix +25% POC nano), P3 (50% ABmix+50% POC nano), P4 (25% ABmix+75% POC nano), and P5 (100% POC nano) each replicated five times. Observed parameters included plant height, leaf number and area, and fresh and dry weight. Result showed that treatment P3 gave the best performance in all observed variables. The balanced combination of ABmix and POC nano improve nutrient availability and photosynthetic efficiency, supporting optimal plant growth. Nano POC from gamal leaves shows potential as an alternative organic fertilizer in hydroponic systems, though further research is needed to understand its long-term effects and broader application.

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