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All Journal Jurnal Biolokus: Jurnal Penelitian Pendidikan Biologi dan Biologi
Mamangkey, Jendri
Department of Biology Education, Faculty of Education and Teacher Training, Universitas Kristen Indonesia, Jakarta, Indonesia
Agriculture, Biological Sciences & Forestry Education

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Production of tempe koro benguk using local starter and its implementation as a biotechnology module for high school students Septiani, Aulia; Mamangkey, Jendri; Adinugraha, Fajar; Mendes, Lucas William
Jurnal Biolokus : Jurnal Penelitian Pendidikan Biologi dan Biologi Vol 7, No 2 (2024): December
Publisher : Universitas Islam Negeri Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30821/biolokus.v7i2.3748

Abstract

The Kurikulum Merdeka emphasizes integrating local wisdom into education to develop students’ soft skills and character. Traditional foods like koro benguk tempe (TKB), a fermented product made from Mucuna pruriens (L.) DC. from Dimoro Village, Central Java, offer an excellent avenue for such integration in biotechnology education. A survey at Yadika 4 High School revealed a lack of local wisdom-based practical guides, demanding the need for resources that could enhance student engagement in biotechnology knowledge. This study developed practical guidelines for TKB production, focusing on its organoleptic properties, integration feasibility, and feedback from teachers and students. Laboratory experiments and module development were combined to collect data. Organoleptic tests identified 0.3% starter concentration as optimal, producing tempe with a white color, soft texture, and pleasant taste. The practical guidelines achieved a validation score of 89% from language, material, and media experts, while teachers rated them at 90%, and students responded positively with a 73% score. Further research is needed to refine the fermentation process of TKB beyond 36 hours and analyze its pH content. Expanding the study to include other fermented local products could further enhance biotechnology learning. Integrating local wisdom through practical guides not only promotes cultural preservation but also improves students' memory, manipulative skills, creativity, communication, and responsibility.
Formulation of Jakaba fertilizer from banana peel, pineapple peel, tea dregs for enhanced pak choi (Brassica rapa subsp. Chinensis) growth Muttaqin, Salwa Zainum; Mamangkey, Jendri; Silalahi, Marina; Mendes, Lucas William
Jurnal Biolokus : Jurnal Penelitian Pendidikan Biologi dan Biologi Vol 8, No 1 (2025): June
Publisher : Universitas Islam Negeri Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30821/biolokus.v8i1.4470

Abstract

Excessive use of chemical fertilizers can lead to environmental degradation and increase the financial burden on farmers. As a sustainable alternative, liquid organic fertilizer (LOF) derived from Jakaba (also known as jamur keberuntungan abadi) was fermented using common organic wastes. This study aimed to evaluate the effects of different organic waste substrates on the characteristics of Jakaba-based LOF (JLOF) and the growth performance of pak choi (Brassica rapa subsp. Chinensis). A completely randomized design (CRD) was used, consisting of nine treatments with three replications each. The concentration variations of banana peel waste, pineapple peel, and tea grounds used in fermentation include 100 g, 200 g, and 300 g. Observations were conducted in three time intervals on days 0, 14, and 30. Parameters measured included the physical and biological characteristics of the LOF (i.e., pH and fungal growth), as well as plant height, leaf number, and fresh weight of pak choi. The data obtained were analyzed statistically using ANOVA analysis. The results showed that tea dregs provided the most favorable conditions for Jakaba growth and maintained the most stable pH. In contrast, pineapple and banana peels inhibited fungal growth, likely due to the presence of inhibitory compounds such as tannins and bromelain. Field application on pak choi indicated that JLOF derived from tea dregs promoted the best plant growth among all groups. These findings suggest that Jakaba-based LOF formulated with tea dregs holds promise as an effective organic fertilizer and may be further developed for commercial use.
Co-Authors Adinugraha, Fajar Mendes, Lucas William Mendes, Lucas William Muttaqin, Salwa Zainum Septiani, Aulia Silalahi, Marina