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All Journal Jurnal Biologi Tropis Biosaintifika: Journal of Biology & Biology Education Jurnal Pengabdian Magister Pendidikan IPA Journal of Classroom Action Research Jurnal Pijar MIPA Jurnal Tatsqif
I Gde Mertha
Biology Education Study Programme, Faculty of Teacher Training and Education, University of Mataram, Indonesia Jl. Majapahit 62 Mataram, 0370-623873 – NTB 83116
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Education Immunology & microbiology Mathematics Physics Social Sciences Other

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The Effectiveness of Vermicompost and NPK Fertilizer Treatment on Cucumis melo L. Vegetative Growth Raksun, Ahmad; Ilhamdi, Moh. Liwa; Merta, I Wayan; Mertha, I Gde
Jurnal Biologi Tropis Vol. 24 No. 1 (2024): Januari - Maret
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.v24i1.5399

Abstract

Melon is an annual plant, growing creeping with a stem length of about 3 meters. The vegetative and generative growth of melons is influenced by genetic and environmental factors. Environmental factors that affect the growth of melons include the abundance of nutrients in the growing media. Research has been carried out on the effectiveness of vermicompost and NPK fertilizer treatment on melon vegetative growth, with the aim of analyzing the effectiveness of vermicompost in increasing stem length, number, length and width of leaves and stem diameter of melons. effectiveness of NPK fertilizer in increasing stem length, number, length and width of leaves and stem diameter of melons. Effectiveness of the interaction of vermicompost and NPK fertilizer in stimulating melon growth. Growth parameters were measured when the melon was 28, 29 and 30 days after planting, the data obtained was analyzed using Anova. The results showed that vermicomposti is effective in increasing stem length, total and leaf length, but is not effective in increasing leaf width and stem diameter of melons. Application of NPK fertilizer is effective in increasing stem length, total leaves, leaf length, leaf width and stem diameter of melon. The interaction between vermicompost and NPK fertilizer was not effective in stimulating melon growth.
Influence of IAA-Producing Bacteria and Phosphate Solubilizers from The Rhizosphere of Serbania grandiflora (L.) Pers on The in vitro Germination of Vigna radiata (L.) Arianti, Septia; Zulkifli, Lalu; Mertha, I Gde; Rasmi, Dewa Ayu Citra
Jurnal Biologi Tropis Vol. 24 No. 1 (2024): Januari - Maret
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.v24i1.6460

Abstract

This study aims to determine the effect of IAA-producing bacteria and phosphate solvents from the rhizosphere of Serbania grandiflora (L.) Pers on the germination of Vigna radiata (L.). This research began by isolating the rhizosphere bacterium Serbania grandiflora (L.) Pers, which was then characterized by cell morphology, grammatical and morphological characteristics. The ability of bacteria to dissolve phosphate was evaluated qualitatively by observing the presence of clear zones in Pikovskaya media, and quantitatively with a spectrophotometer. The isolate's ability to produce IAA was tested quantitatively using Salkowski reagent, and quantitatively using a spectrophotometer. For the effect of isolates on the growth of green beans, a completely randomized design (CRD) research design was used, with 4 treatments, namely P0 (sterile distilled water); P1 (IAA-producing bacterial culture); P2 (phosphate solubilizing bacterial culture); P3 (IAA producer and phosphate solubilizer). Vigna radiata L. seedling growth test was carried out in vitro on Murphy's medium. The research data were analyzed using the one-way ANOVA test. The results showed that 5 isolates had the ability to dissolve phosphate, with a phosphate solubility index ranging from 1.70-2.14, where isolate RT7 showed the highest value. The isolate's ability to produce IAA at concentrations ranged from 7.1 - 62.7 ppm, with the highest value shown by isolate RT6. The results showed that treatment with IAA-producing bacterial isolates plus phosphate solubilization properties showed a significantly different effect on Vigna radiata L. plant height compared to other treatments.
The Effect of Using NPK Fertilizer and Liquid Organic Fertilizer Vegetable Waste on the Vegetative Growth of Purple Eggplant (Solanum melongena L.) Aryani, Maesa; Raksun, Ahmad; Mertha, I Gde
Jurnal Biologi Tropis Vol. 24 No. 2 (2024): 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.v24i2.6973

Abstract

An key factor in promoting the growth and development of plants is fertilizer. Both organic and inorganic fertilizers can be used for fertilization. If inorganic fertilizers are applied over an extended period of time without the incorporation of organic matter, the soil's quality may be compromised, leading to suboptimal plant development. The purpose of this study is to ascertain the optimal fertilizer dose for purple eggplant growth response, as well as the effects of NPK fertilizer, liquid organic fertilizer made from vegetable waste, and a combination of both on the vegetative growth of purple eggplant plants. A two-factor Complete Random Design was employed in this study, with three replicates and five treatment levels for each of the liquid organic fertilizer made from vegetable waste and NPK fertilizer treatment. The Anova two-way test was used to examine the data, and then the DMRT test was performed. The application of liquid organic fertilizer made from vegetable waste and the combination of the two fertilizers had a real effect on plant height, leaf area, wet weight, and dry weight but no real effect on the number of leaves, according to the results. On the other hand, the application of NPK fertilizer had a real effect on plant height, number of leaves, leaf area, wet weight, and dry weight. The results of the DMRT test (5%) indicated that the optimal dosage for plant height, wet weight, and dry weight was 1.5 grams of NPK and 10 ml of liquid organic fertilizer made from vegetable waste; for the number of leaves, it was 1.5 grams of NPK and 2 grams, and for the area of leaves, it was 1 gram of NPK.
Vegetative Growth Analysis of Mustard Greens (Brassica juncea L) Consequences of Vermicompost and Urea Fertilizer Treatment Raksun, Ahmad; Ilhamdi, Liwa; Merta, I Wayan; Mertha, I Gde
Jurnal Biologi Tropis Vol. 24 No. 3 (2024): July - September
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.v24i3.7517

Abstract

Research on Analysis of vegetative growth of mustard greens (Brassica juncea L) due to vermicompost and urea fertilizer treatment was carried out from April to July 2024 In West Lombok. This research aims to analyze: 1) vegetative growth of green mustard after urea fertilizer treatment, 2) vegetative growth of mustard greens after vermicompost treatment 3) the interaction effect of vermicompost and urea fertilizer treatment on the growth of green mustard. In the research a 2 factor design was used. Growth parameters of mustard greens measured were plant fresh weight, stem height, number of leaves and length of mustard green leaves. Data from measurements of all the growth parameters above were analyzed using analysis of variance. The results of the mustard green growth analysis showed that: (1) urea fertilizer treatment had a significant effect on fresh weight, plant height, number of leaves and leaf length of mustard greens, (2) vermicompost treatment had a significant effect on all mustard green growth parameters. (3) the interaction between urea and vermicompost fertilizer treatments did not have a real effect on the growth of mustard greens.
The Effect of NPK Fertilizer and Liquid Organic Fertilizer Made From Rice Washing Water on the Growth of Pakchoy (Brassica rapa L.) Maulanda, Rezqi; Raksun, Ahmad; Mertha, I Gde
Jurnal Biologi Tropis Vol. 24 No. 4 (2024): Oktober - Desember
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.v24i4.7657

Abstract

Macronutrients (N, P, and K) are essential for plants. Plants that are deficient in any of these elements may produce less in terms of both quantity and quality. The purpose of this study is to ascertain how pakchoy (Brassica rapa L.) growth is impacted by the concentration of liquid organic fertilizer from rice washing water and NPK fertilizer. This study used a completely randomized design with two components and five treatment levels: liquid organic fertilizer treated with rice washing water (0 ml, 10 ml, 20 ml, 30 ml, and 40 ml) and NPK fertilizer treatment (0 g, 0.5 g, 1 g, 1.5 g, and 2 g). Anova was used to examine research data. The study's findings demonstrated that NPK fertilizer significantly impacted plant growth in terms of plant height, leaf area, number of leaves, and wet and dry weight. Plant height, the quantity of leaves, and plant wet weight were not significantly affected by rice-washed liquid organic fertilizer, but leaf area and dry weight were. The growth of pakchoy was not significantly impacted by the combination of liquid organic fertilizer from rice washing water and NPK fertilizer.
Popolation Structure of Seagrass Species and Environmental Conditions in The Gerupuk Beach Area, Central Lombok Firanza, Yozi Mazri; Syukur, Abdul; Mertha, I Gde
Jurnal Biologi Tropis Vol. 24 No. 2b (2024): Special Issue
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.v24i2b.7681

Abstract

Population structure is a description of conditions in a habitat. Population status in habitats can be categorized into 3 parts, including crisis, threatened and safe. The aim of this research is to analyze the population structure of seagrass species and environmental conditions in the Gerupuk Beach area, Central Lombok. Data collection used the line transect method with a square measuring 1m x 1m. The sampling technique uses a systematic random sampling method. The research results identified 4 species and 3 families. The family includes Potamogetonaceae, Hydrocharitaceae, and Cymodoceaceae. Species in the family, namely Syringodium isoetifolium, Cymodocea rotundata, Halophila avails, and Enhalus acoroides. Environmental conditions in the Gerupuk Beach area, such as temperature, salinity, and pH, are within the range that supports seagrass growth. Temperatures range between 28-30˚C and salinity 25-35‰, in accordance with optimal seawater standards for seagrass ecosystems.
Effect of NPK Fertilizer and Burning Rice Husk Planting Media on the Growth of Spinach (Amaranthus tricolor L.) Katrina, Katrina; Raksun, Ahmad; Mertha, I Gde
Jurnal Biologi Tropis Vol. 24 No. 4 (2024): Oktober - Desember
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.v24i4.7735

Abstract

Applying fertilizer can increase spinach productivity. Fertilization is necessary because the nutrients in the soil can be reduced as a result of being absorbed by plants continuously. For plants to thrive, there must be an adequate supply of nutrients. The purpose of this study is to ascertain the impact of roasted rice husk and NPK fertilizer, as well as the ideal ratio of the two to promote spinach development. A fully randomized design comprising two components, five treatment levels, and three replications was employed in this investigation. The plant height, number of leaves, leaf area, wet weight, and dry weight were all significantly impacted by the NPK fertilizer element, according to the Anova data. At 18 days after planting, the factor of burnt rice husk significantly affected plant height; however, at 35 days after planting, it had no significant influence. The interaction of NPK fertilizer and roasted rice husk had no significant effect on all observation parameters. The best treatment on plant height, leaf area, and wet weight was the dose of 200 g of roasted rice husk and 1.6 g NPK fertilizer, the best treatment on the number of leaves was the dose of 50 g of roasted rice husk and 1.6 g NPK fertilizer, the best treatment on dry weight was the dose of 100 g of roasted rice husk and 1.6 g NPK fertilizer.
Chromosomes Characteristics of Vegetable Fern (Diplazium esculentum) in Rinjani Mountain National Park Pratiwi, Elsa; Mertha, I Gde; Sukarso, A. A.
Jurnal Biologi Tropis Vol. 24 No. 4 (2024): Oktober - Desember
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.v24i4.7846

Abstract

Vegetable fern (Diplazium esculentum) is one type of fern that is utilised by the Indonesian people as one of the food ingredients. Chromosomes are genetic information in cells that are the basic unit of life. The purpose of this study was to determine the number of chromosomes and mitotic index of vegetable spikes (D. esculentum) at various altitudes in Mount Rinjani National Park. The type of research is quantitative research that describes a situation using numbers factually, systematically and accurately quantitative data of vegetable fern chromosomes (D. esculentum). The method used in the research is Squash method. The results showed no difference in the number of chromosomes of vegetable spikes (D. esculentum) at an altitude of 292 masl, 538 masl, 703 masl and 1417 masl. The number of chromosomes of vegetable spikes at all altitudes 2n = 82 (diploid) x = 41. The mitotic index of vegetable spikes showed results that were not significantly different at altitudes of 292 masl, 538 masl, 703 masl and 1417 masl.
Exploration and Inventory of Epiphytic Plants in the Forest of Lemor Botanical Gardens, Suela District, Lombok Island Nabila, Elva Elvina; Zulkifli, Lalu; Raksun, Ahmad; Mertha, I Gde
Jurnal Biologi Tropis Vol. 25 No. 1 (2025): Januari - Maret
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.v25i1.8754

Abstract

Various types of plants are found in Lemor Botanical Garden Forest (located in Suela Village, East Lombok Regency), one of which is epiphytic plants. Epiphytic plant are plants that live attached to other plants. This study aims to determine the types of epiphytic in the Lemor Botanical Garden Forest and the most dominating epiphytic species based on the environmental characteristics of the Lemor Botanical Garden Forest. This research is a descriptive research. Data collection was carried out using the cruisi method from October to November 2024. Data were analyzed qualitatively. The results showed that in the Lemor Botanical Garden Forest, 15 species of epiphytic were found consisting of 8 families and 797 individuals.  The types of epiphytic found include: Grosourdya appendiculata, Nephrolepis exaltata, Microlepia todayensis, Goniophlebium verrucosum, Goniophlebium persicifolium, Drynaria quercifolia, Drynaria sparsisora, Pyrrosia eleagnifolia, Pyrrosia longifolia, Microsorum punctatum, Cryptogonium phyllogonioides, Thuidium glaucinoides, Rhaphidophora pinnata, Syngonium podophyllum, and Piper betle. The most dominating epiphytic species based on the environmental characteristics of Lemor Botanical Garden Forest are epiphytic found growing in the watershed many as 13 species, 3 of which are: Drynaria quercifolia, Microsorum punctatum, and Rhaphidophora pinnata, with a percentage of 37%. The most dominant species found was Drynaria quercifolia from the Polypodiaceae family with 148 individuals.
Analysis of Chlorophyll Content and Vegetative Growth of Land Kale (Ipomea reptans P.) Due to NPK Fertilizer and Bokashi Fertilizer Treatment Azzahra, Fatima; Raksun, Ahmad; Mertha, I Gde
Jurnal Biologi Tropis Vol. 25 No. 4 (2025): 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.v25i4.10322

Abstract

Land kale (Ipomea reptans P.) is a popular leafy vegetable in Indonesia due to its fast growth and high nutritional value. Its productivity relies heavily on the proper application of fertilizer. This study investigates the effects of NPK fertilizer, Bokashi fertilizer, and their combination on land kale's vegetative growth and chlorophyll content. Conducted from May to July 2025 at the Faculty of Agriculture, University of Mataram's greenhouse, the experiment employed a Completely Randomized Design (CRD) with two factors: five levels of NPK fertilizer (0–2 gr/100 ml water) and five levels of Bokashi fertilizer (0–400 gr/polybag). Growth parameters measured included plant height, number of leaves, stem diameter, fresh weight, dry weight, and chlorophyll content. Data analysis involved two-way ANOVA and Duncan’s Multiple Range Test (DMRT). Results indicated NPK fertilizer significantly affected all growth parameters and chlorophyll content, while Bokashi fertilizer significantly influenced stem diameter, fresh weight, and dry weight, but not plant height, leaf number, and chlorophyll content. The interaction between NPK and Bokashi fertilizers significantly impacted plant height, fresh weight, and dry weight, though it had no significant effect on leaf number, stem diameter, and chlorophyll content.
Co-Authors A, Syahrial Abdul Syukur Agil Al Idrus Agus Ramdani Ahmad Raksun, Ahmad Alhafizin, M. Arianti, Septia Aryani, Maesa Azzahra, Fatima Balqis, Yasina Desi, Petronela Didik Santoso Firanza, Yozi Mazri Gito Hadiprayitno I Wayan Merta Ilhamdi, Liwa Ilhamdi, M. Liwa Ilhamdi, Mohammad Liwa Imam Bachtiar Joni Rokhmat Katrina, Katrina Khaerus Syahidi Kodri Madang, Kodri Kurniawan Arizona LALU ZULKIFLI Majdi, Mohammad Zainul Maulanda, Rezqi Moh. Liwa Ilhamdi, Moh. Liwa Nabila, Elva Elvina Napsita, Dian Nazifa, Syuhada PRAPTI SEDIJANI, PRAPTI Pratiwi, Elsa Ramdhani Sucilestari Rasmi, Dewa Ayu Citra Safitri, Ila Sarjan, M Sukarso, A A Sukarso, A. A. Sukarso, Aa Sulastri , Mita Randani Syamsuddin Syamsul Bahri