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Moh. Liwa Ilhamdi
Universitas Mataram
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology

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Journal : Jurnal Biologi Tropis

 1 
Vegetative Growth of Pakcoy (Brassica rapa L.) Due to Different Dose of Bokashi and NPK Fertilizer Ahmad Raksun; Moh. Liwa Ilhamdi; I Wayan Merta; I Gde Mertha
Jurnal Biologi Tropis Vol. 20 No. 3 (2020): September - 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.v20i3.2156

Abstract

Pakcoy is one of popular vegetable croop in Indonesia. Effort to increase the growth of pakcoy can be done by fertilizing. Research on the vegetative growth of fakcoy due to different dosages of bokashi and NPK fertilizer has been carried out in Terong Tawah Village, Wes Lombok Regency. The objectives of this research were to determaine: (1) vegetatif growth of pakcoy due to different dose of bokashi, (2) vegetatif growth of pakcoy due to different dose of NPK fertilizer, (3) the effect of the interaction between bokashi and NPK fertilizer on pakcoy growth. In this research a two factor design was used. The first factor was the dose of bokashi and the second was the dose of NPK fertilizer. The growth parameters were plant height, number of leaves, leaf lenght and leaf width of pakcoy. The research data was analyzed using analaysis of variance. The result showed that: (1) different dose of bokashi significantly affected plant height, number of leaves, leaf lenght and leaf width of pakcoy, (2) different dose of NPK fertilizer significantly affected plant height, number of leaves, leaf lenght and leaf width of pakcoy, (3) interaction between bokashi and NPK fertilizer has no significant effect on all measured growth parameters.
Potential Carbon Content of Seagrass Species Diversity in Coastal Waters of Central Lombok Eva Rosdiana Sari; Abdul Syukur; Moh. Liwa Ilhamdi
Jurnal Biologi Tropis Vol. 21 No. 3 (2021): September - 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.v21i3.2773

Abstract

The marine environment has a significant role in maintaining the balance of gas exchange in the air, especially between oxygen and carbon dioxide. The potential of the marine environment for gas exchange is supported by the existence of marine ecosystems such as seagrass ecosystems. This is in accordance with the blue carbon concept which plays a role in environmental mitigation in reducing carbon through the coastal environment. Therefore, the purpose of this study was to assess the potential carbon content of the diversity of seagrass species at three locations of seagrass beds in the coastal waters of Central Lombok. The research method uses the line transect method and the ashing method. Seagrass vegetation data were analyzed using community structure analysis (diversity, uniformity and dominance). In addition, analysis of seagrass biomass and carbon content of seagrass was carried out. Furthermore, the regression analysis between seagrass density as the independent variable (X) and the carbon content of seagrass species as the dependent variable (Y). The results of the study found 8 species of seagrass found in the waters of Central Lombok with moderate diversity ranging from 1.59-1.77. The value of seagrass biomass in the waters of Central Lombok is dominated by the bottom substrate with a value of 3.38±1.58 gbk.m-2 while the upper substrate with a value of 1.69±0.98 gbk.m-2. The carbon value of seagrass in Central Lombok waters is dominated by the bottom of the substrate with a value of 1.39±0.22 tonC/Ha while the upper substrate is 0.72±0.13 tonC/Ha. Meanwhile, the results of the calculation of the Pearson's correlation (r) between the density of each type of seagrass as an independent variable (X) and the carbon content of each type of seagrass as the dependent variable (Y) shows the equation y = 10,608x + 70,155 with a correlation coefficient of 0.64 which belongs to the category medium and the coefficient of determination (r2) is 0.41. The conclusion of this study is that there is no significant relationship between the density of each type of seagrass and the carbon of each type of seagrass as indicated by the value of Fcount (4.17) < Ftable (6.60) with a value of =0.05 so that H0 is accepted and Ha is rejected.
The Diversity of Butterflies (Lepidoptera) in the Aik Bukak Tourism Park Area Rizka Yulia Ashari; Moh. Liwa Ilhamdi; Didik Santoso
Jurnal Biologi Tropis Vol. 22 No. 1 (2022): January - March
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.v22i1.2850

Abstract

Butterflies have an important role in human life in various fields such as ecology, economy, aesthetics, and education. The Aik Bukak Tourism Park area is one of the butterfly habitats in Aik Bukak Village, Batu Kliang Utara District, Central Lombok Regency. That aims to determine the diversity of butterflies in the Aik Bukak Tourism Park area. Data collection used a purposive survey method with a sweeping technique following three predetermined observation lines, namely the entrance, the path around the pond, and the forest path. This research was fully recorded 327 individuals member of 23 spesies, 18 genera, and 5 families. The analysis of the butterfly species diversity index used the Shannon-Wienner formula and the diversity index value (HÕ›) was 2.939 which means medium category. The species dominance index was analyzed using the Simpson's species dominance formula and obtained the species dominance index value was 0.059, which means that no species dominates at that location.
Vegetative Growth of Green Eggplant Due to Treatment of Vermicompost and NPK Fertilizer Ahmad Raksun; Moh. Liwa Ilhamdi; I Wayan Merta; I Gde Mertha
Jurnal Biologi Tropis Vol. 21 No. 3 (2021): September - 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.v21i3.2948

Abstract

Green eggplant is native to the tropics. Green eggplant is one of the most popular vegetable ingredients in Indonesia. The availability of nutrients in the growing media is one of the most determining factors for the growth and yield of green eggplant. Research on vegetative growth of green eggplant due to vermicompost and NPK fertilizer treatment has been carried out from April to August 2021. This study aims to determine: (1) vegetative growth of green eggplant due to vermicompost treatment, (2) green eggplant vegetative growth due to NPK fertilizer treatment, (3) green eggplant vegetative growth due to interaction of vermicompost and NPK fertilizer treatment. This research was conducted in a factorial completely randomized design with three replications. The first factor is the application of NPK fertilizer which consists of 4 levels and the second factor is the treatment of vermicompost which consists of 5 levels. Research data were analyzed using analysis of variance. The results showed: (1) treatment of NPK fertilizer with different doses significantly effected the number of leaves, stem diameter, leaf length, and stem height of green eggplant. The optimum dose of NPK fertilizer was 2 grams for one plant, which produced the number of leaves, diameter stems, leaf length and stem height of green eggplant were better than treatments at other doses. (2) The treatment of vermicompost had a significant effect on the number of leaves, stem diameter, leaf blade length, and stem height of green eggplant, the optimum dose of vermicompost was 1.8 kg  for 1 m2 of agricultural land, resulting in stem diameter, number of leaves, leaf length and green eggplant stem height was better than other treatments (3) the interaction of vermicompost and NPK fertilizer had no significant effect on stem diameter, number of leaves, leaf length and stem height of green eggplant.
Response of Long Bean Vegetative Growth Due to Different Types of Mulch and Doses of Vermicompost Ahmad Raksun; Moh. Liwa Ilhamdi; I Gde Mertha; I Wayan Merta
Jurnal Biologi Tropis Vol. 23 No. 2 (2023): April-June
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.v23i2.4888

Abstract

Long beans are plants of the Leguminoceae family that grow on vines. Long bean growth rate is influenced by various factors. Some of the external factors that determine the growth rate of long beans are the availability of nutrients and the application of mulch on agricultural land. Research on the vegetative growth response of long bean due to different types of mulch and doses of vermicompost fertilizer has been carried out in Mertak Umbak Village, Central Lombok. This study aims to analyze: (1) the vegetative growth response of long bean due to different types of mulch, (2) the vegetative growth response of long bean due to different doses of vermicompost, (3) the effect of a combination of types of mulch and vermicompost dosage on long bean growth. Research data were analyzed using Anova. The research results show that: (1) the vermicompost treatment significantly affected the increase in total leaf and plant height, but did not have a significant effect on the length and width of long bean leaves, (2) the application of mulch had a significant effect on all observed growth parameters, the highest growth parameters were observed in the application of plastic mulch black silver, (3) the interaction of mulch type and vermicompost dosage had a significant effect on plant height but did not have a significant effect on other growth parameters.
The Effectiveness of Vermicompost and NPK Fertilizer Treatment on Cucumis melo L. Vegetative Growth Ahmad Raksun; Moh. Liwa Ilhamdi; I Wayan Merta; I Gde Mertha
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.
Co-Authors Abdul Syukur Ahmad Raksun Ahmad Raksun Asrin Asrin Didik Santoso Eva Rosdiana Sari I Gde Mertha I Wayan Merta Rizka Yulia Ashari Rizki Mardian Saputri