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All Journal Bioscientist : Jurnal Ilmiah Biologi EDU-BIO : Jurnal Pendidikan Biologi
Arin Ulfiana Mubarokah
Universitas Bengkulu
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology Neuroscience Social Sciences

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Pengaruh Dosis Asam Humat pada Media Cocopeat terhadap Pertumbuhan Cabai Rawit (Capsicum frutescens L.) cv. Ori 202 Evan Vria Andesmora; Riko Aprianto; Ani Sulistiyani; Arin Ulfiana Mubarokah; Steffanie Nurliana; Eben Ezer Simanungkalit; Khonita Rahma Diani
EDU-BIO: Jurnal Pendidikan Biologi Vol. 9 No. 2 (2026): EDU-BIO: Jurnal Pendidikan Biologi
Publisher : Prodi Tadris Biologi Fakultas Tarbiyah dan Keguruan Universitas Islam Negeri Sulthan Thaha Saifuddin Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30631/edubio.v9i2.222

Abstract

Cocopeat banyak digunakan sebagai media tanam organik dalam budidaya hortikultura karena memiliki kapasitas menahan air yang tinggi dan aerasi yang baik; namun demikian, ketersediaan haranya yang relatif rendah sering kali membatasi pertumbuhan tanaman secara optimal. Asam humat telah dikenal sebagai biostimulan tanaman yang mampu meningkatkan ketersediaan hara serta merangsang proses fisiologis tanaman. Penelitian ini bertujuan mengevaluasi respons dosis asam humat terhadap pertumbuhan vegetatif cabai rawit (Capsicum frutescens L.) kultivar Ori 202 yang dibudidayakan pada media cocopeat. Percobaan dilakukan menggunakan empat konsentrasi asam humat, yaitu 0, 2,5, 5,0, dan 7,5 mL L⁻¹. Parameter pertumbuhan yang diamati meliputi tinggi tanaman, jumlah daun, diameter batang, panjang akar, biomassa segar, dan biomassa kering, yang diukur pada fase awal pertumbuhan vegetatif. Hasil penelitian menunjukkan waktu pengamatan berpengaruh nyata terhadap tinggi tanaman dan diameter batang, mengindikasikan adanya dinamika pertumbuhan vegetatif yang aktif pada fase pertumbuhan awal. Aplikasi asam humat berpengaruh nyata terhadap beberapa parameter pertumbuhan, khususnya akumulasi biomassa. Performa pertumbuhan vegetatif tertinggi diperoleh pada perlakuan asam humat 7,5 mL L⁻¹, yang menghasilkan tinggi tanaman tertinggi serta biomassa segar dan kering terbesar. Sebaliknya, perlakuan 5,0 mL L⁻¹ menunjukkan pertumbuhan yang relatif lebih rendah, yang mengindikasikan pola respons dosis yang tidak linier. Efek peningkatan pertumbuhan akibat aplikasi asam humat diduga berkaitan dengan stimulasi perkembangan akar, peningkatan efisiensi penyerapan hara, serta peningkatan produksi biomassa. Temuan ini menunjukkan asam humat berpotensi digunakan sebagai biostimulan yang efektif untuk meningkatkan pertumbuhan C. frutescens yang dibudidayakan pada media berbasis cocopeat, serta dapat menjadi strategi alternatif meningkatkan produktivitas dalam sistem hortikultura tanpa tanah.
Phytoplankton Community Structure in Lake Gedang and Coastal Whiteleg Shrimp Ponds in Bengkulu: Potential Natural Feed Candidates Meliya Wati; Putri Lisya Anggraini; Arin Ulfiana Mubarokah; Ani Sulistiyani; Khonita Rahma Diani
Bioscientist : Jurnal Ilmiah Biologi Vol. 14 No. 3 (2026): September
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v14i3.18924

Abstract

This study aimed to characterize phytoplankton community structure in Lake Gedang and whiteleg shrimp (Litopenaeus vannamei) ponds, compare community characteristics between the two ecosystems, and identify phytoplankton taxa detected in the shrimp digestive tract as preliminary candidates for natural feed. A survey was conducted from September to November 2025 at five stations in Lake Gedang and three stations in shrimp ponds in Bengkulu Province, Indonesia. Phytoplankton were identified microscopically, and community structure was assessed using abundance, the Shannon–Wiener diversity index (H′), evenness (J′), and Simpson’s dominance index (C). Differences in abundance were tested using the Mann–Whitney U test, while relationships between abundance and environmental variables were evaluated using Spearman’s correlation. A total of 40 species were recorded in Lake Gedang and 92 species in the shrimp ponds, with Bacillariophyta showing the highest species richness (67.50% and 65.22%, respectively). Mean abundance was 95.80 ind/L in Lake Gedang and 239.33 ind/L in the shrimp ponds, with a significant difference between ecosystems (U = 0.000; p = 0.036). Mean H′, J′, and C values were 2.360, 0.929, and 0.109 in Lake Gedang and 3.560, 0.933, and 0.036 in the shrimp ponds, respectively. No significant correlations were found between phytoplankton abundance and temperature, pH, dissolved oxygen, or total dissolved solids in Lake Gedang. Four taxa—Anabaena sp., Cosmarium pseudoconnatum, Golenkinia sp., and Ulothrix sp.—were detected in the shrimp digestive tract. These findings indicate distinct phytoplankton community characteristics between the two ecosystems and provide preliminary evidence that the four detected taxa may be ingested by L. vannamei. However, their occurrence does not demonstrate feeding preference or confirm their suitability as natural feed.
Co-Authors Ani Sulistiyani Eben Ezer Simanungkalit Evan Vria Andesmora Khonita Rahma Diani Meliya Wati Putri Lisya Anggraini Riko Aprianto Steffanie Nurliana