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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 2,562 Documents
 66   67   68   69   70 
Analysis of Red Algae Seaweed (Eucheuma cottonii) Cultivation in Jerowaru District, Lombok Regency Sri Wahyuni; Muhammad Nursan; Asri Hidayati
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.v23i2.4878

Abstract

Red algae seaweed (Eucheuma cottonii) is a very important commodity to be developed because it has a high selling price and production. The purpose of this study is to determine the cultivation of red algae seaweed (Eucheuma cottonii) in Jerowaru District, East Lombok Regency, analyze the feasibility of red algae seaweed cultivation business (Eucheuma cottonii) in Jerowaru District, East Lombok Regency, find out the obstacles faced in conducting red algae seaweed (Eucheuma cottonii) cultivation business in Jerowaru District, East Lombok Regency. The method used is the descriptive method. Data collection was carried out by survey techniques. Determination of the research area is carried out by purposive sampling or deliberately. The determination of the number of respondents was carried out by the Slovin method, which was 42 respondents. The collection of respondents was carried out using the Proportional Random Sampling method. The results showed that (1) the average profit obtained is IDR 19,532,149.98 per arable land area or IDR 23,902,980.75 per hectare during one harvest season; (2) the cultivation of red algae seaweed (Eucheuma cottonii) in Jerowaru District is feasible; (3) obstacles faced by farmers in red algae seaweed cultivation business (Eucheuma cottonii) in Jerowaru District, namely lack of capital, lack of labor, pest attacks, diseases, weeds, and erratic weather. It is recommended for farmers to cultivate red algae seaweed (Eucheuma cottonii) in Jerowaru District to increase productivity and be able to overcome the obstacles faced by participating in seaweed cultivation training activities held by related agencies.
Community Structure of Bacillariophyceae Class Microalgaes in Interidal Waters of Gili Sulat, East Lombok Nadia Audina; Khairuddin Khairuddin; Lalu Japa
Jurnal Biologi Tropis Vol. 23 No. 1 (2023): 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.v23i1.4679

Abstract

Gili Sulat is a mangrove forest area that is still in good condition and has a role in balancing the surrounding ecosystem, especially for the microalgae community. The community structure of the microalgae (phytoplankton) class Bacillariophyceae of the intertidal ecosystem of Gili Sulat, East Lombok has not been identified. The research was conducted to determine the community structure of the Basillariophyceae class in the Gili Sulat Intertidal Waters, East Lombok. This type of research is descriptive exploratory. Sampling of water in the Intertidal Waters of Gili Sulat, East Lombok, was carried out at six sampling points.  The analytical indices used are the density index, the diversity index, the species evenness index, and the importance value. The total density is 1,745 individuals/liter. The species diversity index value of 2.92 is included in the medium category. The highest significant value was obtained by Synedra ulna of 45.80% and was the species found at each sampling point. The species evenness index of 0.82 is classified as stable (even), meaning that no species dominates the large number of individuals at a particular sampling point. The community structure of the microalgae class Bacillariaphyceae in the intertidal waters of Gili Sulat, East Lombok is quite stable because it has a fairly high density, with species diversity in the moderate category and high evenness of species and the dominance of each species is relatively the same (so no species dominates).
The Effectiveness of CO2 Absorption Between Phytoplankton and Seagrass Beds in The West Sekotong Intertidal Zone of Lombok Island Sri Puji Astuti; Ika Puspita Dewi; Siti Rosidah; Sari Novida; Eka S Prasedya; Dining A Candri; Hilman Ahyadi
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.v23i2.4769

Abstract

The increasing sea surface temperature could be approved CO2 levels on the coast. It has been assumed the primary productivity in the intertidal zone was to absorb CO2 from the water column for photosynthesis. In addition, the substrate floor has a potential source of CO2 from decomposers. Phytoplankton and seagrasses are the primary productivity in the intertidal zone. Both of them have chlorophyll, they maintain the CO2 as a carbon source to move the photosynthetic systems to develop the metabolism of the body's cells. The measurements were made of the leaves and rhizomes of all the seagrass species. The absorption process was clarified by measuring the growth rate, percent LOI, and percent carbon in the whole body of the Tetraselmis sp and Dunaliella sp, which were phytoplankton species isolated from seagrass ecosystems. Enhalus acoroides (Ea) had the highest carbon content.  On the other hand, Halophila ovalis and Halophila minor are the lowest carbon due to the distribution of Ea being the widest, they were found in all of the sampling areas. In addition, the factor that was supported was due to its high growth rate ability. Phytoplankton and seagrass on the coast of Sekotong Barat absorb CO2 in the water column and floor of the sediment (carbon sink). The presence of a different increase in carbon content between Tetrasemis sp and Dunaliella sp indicates, the species of phytoplankton respond differently to CO2 stress in the ocean.
The Quality of Compost Made From a mixture of Oyster Mushroom Baglog Waste and Cow Manure with the Addition of Dekomposer of Promi, MA-11, and BPF Muhammad Tirzady Prasetyo; I Gusti Made Kusnarta; Lolita Endang Susilowati; Mahrup
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.v23i2.4874

Abstract

:  This study aims to determine the quality of compost of a mixture of Oyster Mushroom Baglog waste and Cow Manure, using Promi (Promoting Microbes), MA-11 (Microba Alfaafa-11), and BPF (Phosphate Solubilizing Bacteria) decomposers. The experiment was arranged in a Completely Randomized Design (CRD), consisting of 4 ( Four) treatments: P0 = Baglog Oyster Mushrooms and Manure with a ratio = 1:2 without decomposers, P1 = Baglog Oyster Mushrooms and Manure with a ratio = 1:2 plus Promi, P2 =Baglog Oyster Mushrooms and manure with a ratio = 1:2 plus MA 11, P3=Baglog Oyster Mushrooms and Manure with a ratio of = 1:2 plus (BPF). Each treatment was repeated three times to obtain 12 experimental units. Parameters measured were: texture, pH, C-organic, N-total, C/N Ratio, Temperature (Temperature), Compost Color, and Compost Odor. The results showed that of the three decomposers used in this study, Promi was better at decomposing compose for two months. Promi is faster in changing the color of the compost to black, faster in reducing the temperature of the compost, has a pH of 6.81, and has the lowest organic C content and total N content of 0.94%. Of the three decomposers used in this study, Promi is better and faster for producing compost from a mixture of baglog and cow manure than the other treatments.
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 Utilization of Home Yard Medicinal Plants by Traditional Healers (Battra) in Pentek Village, Sadaniang District of Mempawah Regency Irwan Pirmansyah; Fathul Yusro; Yeni Mariani
Jurnal Biologi Tropis Vol. 23 No. 3 (2023): 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.v23i3.4907

Abstract

Currently, people still choose traditional medicine as one of the options to maintain their health. This conventional medicine uses ingredients from wild plants taken from the forest or plants grown in the home yard. Although the forest provides various medicinal plants, many are currently cultivated in the yard for easy access when needed. This study aims to analyze medicinal plants in the home yard used by Battra in Pentek Village, Sadaniang District, Mempawah Regency. This study used a survey method by conducting interviews with all Battra in Pentek Village. We then analyzed plant species, habitus and parts of plants used, processing methods, usage methods, and state of concoction. The results showed that Battra in Pentek Village used 37 medicinal plants in their home yards, with the most widely used plant family being Zingiberaceae (5 species). The most frequently used plant habitus was herb (56.76%), and the most commonly used plant part was leaves (28.81%). The processing method used was boiling (37.14%), and the usage method was drinking (39%)—the form of concoction used as a mixture (70.27%).
Utilization of Plants as Food Source: A Study in Sungai Bakah Village, Melawi Regency Niconaus Niconaus; Hasan Ashari Oramahi; Fathul Yusro; Yeni Mariani
Jurnal Biologi Tropis Vol. 23 No. 3 (2023): 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.v23i3.4926

Abstract

Nature has a high potential for biological natural resources that humans, including plants as food, can utilize. This study aims to analyze the types of plants as a source of food used by the people of Sungai Bakah Village, Pinoh Selatan District, Melawi Regency. This study used a survey method. Respondents selected using a purposive sampling technique were interviewed to obtain data on the utilization of plants used as food ingredients. The data obtained is then analyzed using use value and fidelity level. The results showed that all respondents interviewed (131 respondents) used plants as a food source. A total of 84 types of plants were used, with fruit as the part that was most used (49.44%). Vegetables and fruits are the most widely used forms of utilization. Plants with the highest UV values ​​came from starch (Gymnopetalum cocinense), rice (Oryza sativa), chilies (Capsicum frutescens L.), and bamboo shoots (Dendrocalamus asper) with a value of 1. 84 plants species had the highest FL values ​​(100), most of which comes from the category of utilization as fruits.  
The Productivity of Red Chili (Capsicum annum L.) Improvement Using Inorganic Fertilizer and Biofertilizer: Implications for Sustainable Agriculture Ade Hilman Juhaeni; Rudi Priyadi
Jurnal Biologi Tropis Vol. 23 No. 3 (2023): 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.v23i3.4933

Abstract

Red chili (Capsicum annum L.) is one of the important horticultural crops, yet its productivity is still relatively low. This study aims to determine the productivity of red chili improvement through the use of inorganic fertilizer and biofertilizer. The factorial randomized group design (RAK) experimental design with 2 factors and 3 replicates (10 plants for each replicate) was used in this research. Factor I consisted of four doses of inorganic fertilizer (K), namely: 200 kg/ha (k1), 300 kg/ha (k2), 400 kg/ha (k3), 500 kg/ha (k4). Factor II consists of four concentrations of biological fertilizer (H), namely: 10 ml/L (h1), 20 ml/L (h2), 30 ml/L (h3), 40 ml/L (h4). The results showed that there was no interaction effect between the use of inorganic fertilizer (NPK) and the concentration of biofertilizer (M-Bio) on fruit weight per plant (g/plant) and fruit yield per hectare (t/Ha). However, the single use of biofertilizer with a concentration of 20 ml/L significantly increased the productivity of fruit weight (555.75 g/plant or 14.81 t/Ha). Biofertilizers such as phosphate solubilizing microorganisms and nitrogen-fixing bacteria can increase the availability of macro and micro nutrients in the soil and the productivity of chili significantly. The use of biofertilizers has the benefit of reducing farmers' dependence on inorganic fertilizers. Therefore, the use of a combination of inorganic fertilizer and biofertilizer not only can be a good alternative to increase the productivity of red chili effectively and sustainably, but also to reduce the negative impact of using inorganic fertilizer on the environment.
Seed Dormancy Breaking of Sugar Palm (Arenga pinnata Wurmb Merr) with Sanding and Submersion in various Concentration of Potassium Nitrate (KNO3) Nurul Chaerani
Jurnal Biologi Tropis Vol. 23 No. 3 (2023): 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.v23i3.4937

Abstract

Sugar palm (Arenga pinnata) is one of the non-timber forest product that has many benefits and still had high economic demands, therefore it is necessary to be cultivated and due to the farmers still utilizing sugar palm stands that grow naturally. The cultivation of sugar palm is so difficult to be done because there was no efficient and effective technology that can break the dormancy problem yet. The objective of this research was to determine the effect of sanding and seeds submersion in various concentration of KNO3 to break the dormancy of sugar palm seeds. The experiment was performed in Greenhouse of Agriculture Faculty of Mataram University from June to September 2015. The experiment was conducted in 2x3 factorial experiments on Completely Randomized Design (CRD) with five replications. First factor was sanding (A):  A1 = without sanding dan A2 = sanding and second factor was submersion in various concentration of KNO3 (N): N1 = 0.4%, N2 = 0.5%, and N3 = 0.6%. Results of this study indicated that both treatments gave significant effect in breaking the dormancy of sugar palm seeds. Sanding and submersion in 0.5% KNO3 resulted in single significant effect on all parameters except embryonic axis. The interaction between both treatments only showed significant effect on rotten seeds.
Morphological Variations of Nepenthes mirabilis (Lour.) Druce in the Peat Swamp Habitat Singgih Tri Wardana
Jurnal Biologi Tropis Vol. 23 No. 3 (2023): 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.v23i3.4958

Abstract

Nepenthes mirabilis is a type of lowland Nepenthes. Nepenthes mirabilis has morphological variations in size and color in its natural habitat. This study was conducted with the aim to determine the morphological variations of Nepenthes mirabilis in peat swamp habitat including stems, leaves and pitchers. This research was carried out in Pulu Beruang Village, Tulung Selapan District, Ogan Komering Ilir, South Sumatera. The research method used exploration method. Determination of the observation sample using a random plot method selected by purposive sampling. The parameters observed in this study were the morphological characteristics of Nepenthes mirabilis stems, leaves and sacs as well as environmental factors. Research results, Nepenthes mirabilis has a round stem shape (teres), red and green in color. The leaves are lanceolate, stalked, the edges of the leaves are flat and smooth, the upper surface of the leaves is green or reddish. Waist-shaped pouch, yellowish green in color with red striated and green with red spots.

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