Open Access journal ISSN (Print) 2614-154X - ISSN (Online) 2614-1558 This journal is no longer being updated because: the publisher no longer provides RSS feeds
Authors:Bunga Indri Pertiwi Indri, Isti Rusdiyani, Lukman Nulhakim Abstract: The background of this research is (1) the lack of availability of learning media (2) the lack of student motivation in participating in the learning process; and (3) Science learning outcomes are still not optimal. This study aims to develop learning media, analyze feasibility, analyze effectiveness, and analyze students' responses to learning media using animated videos Powtoon on the matter of caring for living beings. Method used in this study are Research and Development (R&D) 4-D approach. The final findings in this research and development are limited student trials of products in the form of animated video learning media using applications Powtoon for students of class IV Public Elementary School Cibeber District. Effectiveness trials at the development stage were carried out by researchers by doing pre-test and post-test. Known value pre-test obtain an average value of learning outcomes of 55.68. As for value post-test obtained an average score of 79.37 learning outcomes with the number of respondents or students used as test subjects as many as 80 students from four schools. In the next trial, the researcher distributed questionnaires to teachers and students. This questionnaire is limited to knowing the responses and responses of students at the dissemination stage of using animated video learning media Powtoon by getting the results of the average percentage of teacher and student responses to animated video learning media, which reached 94% in the "very good" category. Thus using animated video learning media Powtoon developed is suitable for use in the learning process. PubDate: 2023-05-03 DOI: 10.22236/jbes/7111429 Issue No:Vol. 7, No. 1 (2023)
Authors:Nunung Elawati, Carmelia Santania Fahik, Arifah Nurul Izza, Fika Ainur Rahmawati Abstract: Background: Coal burning activities at PLTU leave large amounts of waste every year, which can become a problem of environmental pollution. Bottom ash is known to contain nutrients needed by plants. This study aims to determine the effect of adding a mixture of compost as an ameliorant to bottom ash on the pH and plant growth of Capsicum annuum. Methods: The study used a completely randomized design (CRD) with 3 replications and 4 formulations, namely B0 = coal waste (200g); B1 = 100g of bottom ash: 100g of planting medium; B2 = 50g bottom ash: 150g planting medium, and B3 = 150g bottom ash: 50 g planting medium. Parameters observed included plant height, number of leaves, root length, number of roots, total biomass and pH. Results: The results showed that treatment B0 had the highest pH and B2 had the lowest pH. Treatment B2 successively showed the highest plant height, the largest total biomass, and the highest root length, and had a significant effect on leaf number, but had no significant effect on root number. Conclusions: Based on the results of the study showed that the application of bottom ash with soil compost media had an effect on the pH and the growth of C. annuum plants, especially on plant height, number of leaves, total biomass, and root length of C. annuum plants PubDate: 2023-05-01 DOI: 10.22236/jbes/7111185 Issue No:Vol. 7, No. 1 (2023)
Authors:Alifia Zahra Nanda Hasanah Alifia Zahra Nanda Hasanah Abstract: Background: The teak-based agroforestry system in Gemawang Wonogiri Village has the potential for various types of constituent tree vegetation that can act as carbon stock stores. This research was conducted considering the limited research on teak-based agroforestry systems, especially in the Wonogiri area. This study aims to provide information on the composition, structure, and diversity of tree vegetation and to determine the potential carbon stocks of tree vegetation standing in teak-based agroforestry systems. Methods: The research method used a 20 x 20 m2 plot of 1 ha, and the plots were placed using a purposive sampling approach. Results: Found 9 species of tree vegetation from 8 families with a total of 271 individuals ha-1. The species of teak tree (Tectona grandis) has the highest INP of 81.56 %. The Diversity Index is classified as moderate with a value of 1.79, and the Dominance Index is classified as low at 0.21. The amount of carbon stored in tree stands is 45.71 MgC ha-1. Conclusions: This research can give information and points of reference about the structure and composition of stands in agroforestry systems, as well as their potential to store carbon stocks. The research data is useful for the community as a source of information regarding the condition of the agroforestry area in Gemawang Village so that they can make optimal use of the area by developing suitable vegetation. PubDate: 2023-05-01 DOI: 10.22236/jbes/7111403 Issue No:Vol. 7, No. 1 (2023)
Authors:Phika Ainnadya Hasan, Nurul Hidayah, Nur Fadillah Abstract: Background: Baringeng is a corn-producing village in Soppeng Regency, South Sulawesi. The main problem for corn farmers in the town is insect pests. Insect pests damage the plant, which has an impact on decreasing yields. Control of insect pests must be by the type of insect pests. This study aims to calculate the diversity of insect pests of corn in Baringeng Village and the damage they cause. Methods: Data was collected in Takku Hamlet, Baringeng Hamlet, and Tanjonge Hamlet. with a systematic plot sampling method with the help of light traps, sweep nets, and direct collection of pests. Observations included the number of individuals and types of insect pests. Data were analyzed by the Shannon-Wiener diversity index (H'), evenness index (E), dominance index (C), and similarity index. Results: There were three types of insect pests with a total of 153 individuals that attacked corn in Baringeng Village, namely grasshoppers (Oxya sp.), planthoppers (Peregrinus maidis), and armyworm (Spodoptera frugiperda). The diversity index is included in the low category (H'=0.89), the evenness index (E) is in the high sort (E=0.81), the dominance index is in the low sort (C=0.44), and the lowest similarity index shown between Dusun Baringeng and Dusun Takku (IS=50%). Conclusions: The types of insect pests found in Baringeng Village come from three different orders, namely Orthoptera, Lepidoptera, and Hemiptera. Each problem shows other attack characteristics, but all attack the leaves. So that pest control can use natural materials by spraying on leaves, polyculture, crop rotation, or taking pests directly. PubDate: 2023-04-30 DOI: 10.22236/jbes/7111419 Issue No:Vol. 7, No. 1 (2023)
Authors:Sahasika Sean Putra, Triastuti Rahayu, Erma Musbita Tyastuti Abstract: Background: Cambodian trees are known to be resistant to biotic and abiotic stresses which may be influenced by the presence of rhizosphere bacteria as Plant Growth-Promoting Rhizobacteria (PGPR). This study aims to isolate and characterize Cambodian tree rhizosphere bacteria from burial soils that have the potential to produce IAA. Methods: Rhizospheric soil samples were taken from Pracimaloyo TPU, Surakarta, Central Java, at 5 points attached to the surface of the frangipani tree roots to be inoculated using the scattering cup method at 10-5 and 10-6 dilutions in NA (nutrient agar). After 48 hours, colonies were counted to obtain population data. The ability of rhizosphere bacteria to produce IAA was carried out qualitatively and quantitatively at the age of 24 and 48 hours of culture. Rhizospheric bacteria isolates potential to produce IAA were characterized macroscopically (colony morphology) and microscopically by Gram staining. Results: The population of frangipani tree rhizosphere bacteria in all blocks did not show a significant difference and was detected to have a population between 1.9 – 10.4 x 106. Qualitative test of the ability to produce IAA, it was detected that 34.88% of isolates produced very high IAA. The highest concentration of IAA was produced by isolate P37, followed by P38 and P24 at 48 hours of age, namely 113.58 ppm, 77.95 ppm, and 55.69 ppm. All potential isolates to produce IAA are cocci-shaped gram-negative bacteria. Conclusion: The population of frangipani tree rhizosphere bacteria in Pracimaloyo TPU ranged from 1.9-10.4 x 106 CFU/g and 34.88% had the ability to produce IAA. The concentration of IAA produced was higher at 48 hours of culture compared to 24 hours with the highest concentration by isolate P37 (83.098 ppm and increased to 113.588 ppm). Isolate P37 is a gram-negative cocci-shaped bacterium and irregular colonies. PubDate: 2023-04-30 DOI: 10.22236/jbes/7111375 Issue No:Vol. 7, No. 1 (2023)
Authors:Devi Bunga Pagalla Abstract: Background: Microspores are small haploid spores that develop into the male gametophyte. Microsporocytes undergo meiotic division to form microspores. Microspores can be found in seedless and seed plants. The microspores in each flowering plant are different. This study aims to observe microspores on eggplant flowers. Method: Microspore observations were carried out on different flower bud sizes until the flower buds bloomed. Result: The results showed microspores in eggplant had different stages of development for each flower bud size. The stages of microspore development observed were Early uninucleate (Young microspore), Mid-uninucleate, Late uninucleate (Vacuolate microspore), early binucleate (Young bicellular pollen), mid-binucleate, and mature pollen. Conclusion: In eggplant microspore culture, anther length is a strong parameter to predict the stage of microspore development contained there in. PubDate: 2023-04-30 DOI: 10.22236/jbes/7111357 Issue No:Vol. 7, No. 1 (2023)
Authors:Hastangka Hastangka, Latifa Nuraini Abstract: Background: Biology education has an important role in scientific development and the process of strengthening the role of biology education for sustainable development and the process of advancing the science of biology, during this time biology materials developed rapidly. Methods: This study used a qualitative approach by analyzing textbooks and biology education policies in Indonesia. This research uses policy analysis and content analysis. The data used in this study used biology textbooks published by the government for the senior high school level. Result: biology education material that has developed since there were three changes to the curriculum in Indonesia after the issuance of Law Number 20 of 2003 concerning the National Education System does not appear to have shown any significant changes specifically in the subject matter for class X SMA. Curriculum policies and the development of textbooks in Indonesia focus more on and continue the material that has been in the previous curriculum since the emergence of the competency-based curriculum (2004). Conclusion: the development of biology education in Indonesia from the aspects of materials, textbooks, and curriculum policies does not show a significant change and development in the development of biology science for class X SMA. This study concludes that textbooks and curriculum policies have not been able to change the perspective and substance of the direction of learning biology in Indonesia. So the portrait of the capacity and insight of the Indonesian generation's knowledge about biology can be seen from the curriculum policies made and the existing materials. PubDate: 2023-04-30 DOI: 10.22236/jbes/7111234 Issue No:Vol. 7, No. 1 (2023)
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