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All Journal Biocaster : Jurnal Kajian Biologi
Cicik Suriani
Program Studi Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Medan, Jalan William Iskandar Ps. V, Deli Serdang, Sumatera Utara 20221, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology

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Pengaruh Pemberian Pupuk Urea dan Pupuk Organik Cair (POC) Batang Pisang terhadap Pertumbuhan dan Hasil Tanaman Pakcoy (Brassica rapa L.) Maretta Indah Sari Simanjuntak; Cicik Suriani
Biocaster : Jurnal Kajian Biologi Vol. 6 No. 1 (2026): January
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v6i1.1050

Abstract

Fertilization plays an important role in increasing plant growth and yield. This study aims to analyze the effect of urea fertilizer and liquid organic fertilizer (POC) of banana stems on the growth and yield of pakcoy (Brassica rapa L.). The study was conducted in Serdang Village, Beringin District, Deli Serdang Regency, from January to August 2025 using a 4x4 factorial randomized block design (RAK) with two replications. The treatments consisted of urea doses (0, 4, 5, and 6 g/polybag) and banana stem POC concentrations (0, 60, 70, and 80 mL/L). The parameters observed included plant height, number of leaves, leaf area, total fresh weight, and root weight. Data were analyzed using two-way ANOVA and DMRT test at the 5% level. The results showed that urea fertilizer had a very significant effect on all parameters, while banana stem POC had a significant effect on most growth and yield parameters. The interaction of the two treatments had a significant effect on several parameters. The combination of 6 g urea per polybag and 80 mL/L of fertilizer-free organic fertilizer (POC) yielded the best results, while the treatment without fertilizer yielded the lowest. The combination of urea and banana stem fertilizer proved effective in increasing the growth and yield of pakcoy.
Studi Etnobotani Ritual Erpangir Ku Lau pada Masyarakat Karo di Kecamatan Kabanjahe Kabupaten Karo Dinda Syahfitri; Tri Harsono; Cicik Suriani; Wina Dyah Puspita Sari; Dina Handayani; Ahmad Shafwan S. Pulungan
Biocaster : Jurnal Kajian Biologi Vol. 6 No. 2 (2026): April
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v6i2.1126

Abstract

The Erpangir Ku Lau ritual is a Karo people's self-purification ritual that has traditionally utilized plants as the main element. This study aims to examine the belief system (cosmos), local knowledge (corpus), and plant utilization practices (praxis) in the Erpangir Ku Lau ritual in Kabanjahe District. The study was conducted in January 2026 in Lau Cimba Village using a qualitative and quantitative descriptive approach through semi-structured interviews with 10 key informants selected by purposive sampling. The results identified 17 species from 11 plant families. The Rutaceae family dominated with 4 species (23.53%), followed by Rosaceae with 3 species (17.65%), and Poaceae with 2 species (11.76%). The most commonly utilized organs were fruits and flowers (29.41%), followed by leaves (23.53%). Shrub habitus dominated with 47.06%. The Karo people view plants as symbolic and spiritually significant, with the kaffir lime (Citrus hystrix D.C.) as a key plant. Plant use reflects holistic local wisdom, combining ecological, chemical, and spiritual aspects. Documenting this traditional knowledge is crucial to prevent its extinction due to modernization.
Co-Authors Ahmad Shafwan S. Pulungan Dina Handayani Dinda Syahfitri Maretta Indah Sari Simanjuntak Tri Harsono Wina Dyah Puspita Sari