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All Journal Torani Journal of Fisheries and Marine Science Pendas : Jurnah Ilmiah Pendidikan Dasar
Sahir, Muhammad
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Economics, Econometrics & Finance Environmental Science Social Sciences Other

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The Effect of Combination of Nitrogen and Phosphate Enrichment on the Development of Seaweed Spores (Kappaphycus alvarezii) Sahir, Muhammad; Rustam, Rustam; Latama, Gunarto; Herliyanti, Herliyanti; Damayanti, Nur Ulfa
Torani Journal of Fisheries and Marine Science VOLUME 6 NOMOR 1, DESEMBER 2022
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35911/torani.v6i1.22366

Abstract

Seaweed (Kappaphycus alvarezii) is one of the aquatic commodities that has the potential to be developed due to demand reaching the international market (Ari, SP and Risna Yusuf, 2018). Provision of seeds is still carried out by vegetative means (cuttings) (Runtuboy N and Slamet Abadi, 2018). However, there are problems, especially the provision of quality seeds, large scale, and does not depend on the season. Provision of seeds can also be done generatively. K. alvarezii can be developed by exploiting the nature of sexual reproduction through the development of spores which are characterized by the presence of cystocarp on the surface of the thallus (Juniarta I, 2016). However, the cystocarp in its growth really needs nutrition in order to produce spores of good quality and quantity. The nutrients needed are nitrogen and phosphate. This is due to the role of nitrogen as a constituent of protein and phosphate as a provider of energy (Pauwah A, et al., 2020). The purpose of this study was to determine the dose ratio of nitrogen and phosphate enrichment on cystocarp development. The research was carried out from November 2018 to February 2019, at the Seaweed Laboratory of the Takalar Brackish Water Aquaculture Fishery Center (BPBAPT). The study contained 6 treatments with 3 repetitions, namely Treatment A = Without enrichment (SW), Treatment B = 0.5 ppm N: 0.5 ppm P, Treatment C = 1 ppm N: 0.5 ppm P, Treatment D = 1.5 ppm N : 0.5 ppm P, Treatment E = 0.5 ppm N : 1 ppm P, and Treatment F = 0.5 ppm N : 1.5 ppm P. The results showed that the highest germination was in treatment D with an average of 56.95%. However, the research was not significantly different between treatments (p>0.05).
PENGEMBANGAN E-BOOK INTERAKTIF PADA MATA PELAJARAN BAHASA INDONESIA MATERI ```'AYO KERJA SAMA” UNTUK SISWA KELAS V SD NEGERI 3 ANDOWIA Sahir, Muhammad; Fajriani, Alfiah; Razilu, Zila
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 02 (2026): Volume 11 Nomor 02, Juni 2026 Public
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v11i02.48800

Abstract

Learning Indonesian language in elementary schools still requires instructional media that can improve students’ engagement and understanding in the learning process. Th is study aimed to develop an interactive e-book as a learning medium for Indonesian language subjects and to determine its feasibility, practicality, and effectiveness in supporting learning activities. The study employed a Research and Development (R&D) method using the ADDIE model, which consists of analysis, design, development, implementation, and evaluation stages. The research subjects included teachers and 26 fifth-grade students of SD Negeri 3 Andowia, North Konawe Regency. Data were collected through expert validation questionnaires, student response questionnaires, observations, and learning outcome tests. Data analysis used qualitative and quantitative approaches. The results showed that the developed interactive e-book was categorized as highly feasible, with a media expert validation score of 92% and a material expert validation score of 96%. In addition, student responses reached 90%, indicating that the learning media was practical and easy to use in the learning process. The effectiveness of the e-book was also reflected in the improvement of students’ learning outcomes after using the media during learning activities. Therefore, the developed interactive e-book was declared valid, practical, and effective as a learning medium for Indonesian language subjects in elementary school. This product is expected to become an innovative digital learning medium to improve the quality of learning and students’ learning interest in elementary schools.
Co-Authors Damayanti, Nur Ulfa Fajriani, Alfiah Gunarto Latama, Gunarto Herliyanti Herliyanti, Herliyanti Razilu, Zila Rustam Rustam