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All Journal Jurnal Biologi dan Pembelajarannya (JBP) Jurnal Bioterdidik: Wahana Ekspresi Ilmiah JURNAL PENGABDIAN KEPADA MASYARAKAT BIOEDUSAINS: Jurnal Pendidikan Biologi dan Sains KLOROFIL: Jurnal Ilmu Biologi dan Terapan Best Journal (Biology Education, Sains and Technology) SOSIOEDUKASI : JURNAL ILMIAH ILMU PENDIDIKAN DAN SOSIAL Jurnal Mu'allim Journal of Education and Teaching Learning SIMBIOSA KLOROFIL: Jurnal Ilmu Biologi dan Terapan Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Khatulistiwa: Jurnal Pendidikan dan Sosial Humaniora Innovative: Journal Of Social Science Research Symbiotic: Journal of Biological Education and Science Indonesian Journal of Biology Education Edumaspul: Jurnal Pendidikan
Kartika Manalu
Universitas Islam Negeri Sumatera Utara
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Physics Public Health Social Sciences Other

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Isolasi dan Identifikasi Bakteri Fiksasi Nitrogen Dari Akar Padi Hidroponik Dan Akar Padi Konvensional Pinkhan Aliffia Sekar Andini; Kartika Manalu; Rizki Amelia Nasution
Jurnal Biologi dan Pembelajarannya (JB&P) Vol 11 No 2 (2024): Oktober 2024
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/jbp.v11i2.22304

Abstract

Nitrogen fixation bacteria are bacteriathat are able to convert free nitrogen into nitrogen that can be used by theplants. This study aims to determine the presence of bacteria fixationnitrogen fixation bacteria in hydroponic and conventional rice roots and can identify the bacteriaidentify the bacteria. Isolation was done from the roots of rice (Oryza sativa) with the scatter blot method on NA (Nutriet Agar), and then tested for thethen tested for the ability to fix nitrogen using mineral-free nitrogen media added with Brontomimineral-free nitrogen medium added with Brontomiul Blue and glucose, which was incubated for 24 hours, thenincubated for 24 hours and then biochemical tests. From the results of the isolation there are 2 isolates that are able to bind nitrogen and have the ability ofHOS 833 ppm and KOS 1,128 ppm. The results of the characteristics and biochemistrycharacteristics and biochemistry showed that the isolate HOS is the genusBacillus genus and KOS is Azotobacter genus.
Potensi Biomassa dan Cadangan Karbon pada Tumbuhan Bawah dan Pohon di Hutan Desa Serdang Kawasan Tahura Kabupaten Karo Sumatera Utara Khairunisa Pratiwi; Melfa Aisyah Hutasuhut; Kartika Manalu
BIOEDUSAINS:Jurnal Pendidikan Biologi dan Sains Vol. 9 No. 3 (2026): BIOEDUSAINS:Jurnal Pendidikan Biologi dan Sains
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/scpje452

Abstract

This study aimed to determine the diversity, biomass potential, and carbon stocks of understory vegetation and trees in the Serdang Village Forest Area of Tahura, Karo Regency, North Sumatra. The methods used were destructive and non-destructive methods with a purposive sampling technique. Sampling was conducted by establishing measurement plots at three observation locations with a transect length of 150 m. Each location consisted of 10 plots, including 5 plots measuring 20 m × 20 m for tree observations and 5 plots measuring 5 m × 5 m for understory vegetation observations. The results showed that 25 understory plant species belonging to 20 families were identified with a diversity index of 2.66, while 22 tree species belonging to 16 families were identified with a diversity index of 2.38. The biomass of understory vegetation was 0.48 tons/ha with an average of 0.136 tons/ha, whereas tree biomass reached 2366.11 tons/ha with an average of 107.55 tons/ha. The carbon stock of understory vegetation and trees was 1183.194 tons/ha with an average of 591.597 tons/ha. Environmental factors influencing the diversity and biomass of understory vegetation and trees included temperature, humidity, light intensity, and altitude. The study concluded that the Serdang Village Forest Area of Tahura, Karo Regency, has a moderate level of biodiversity with high biomass and carbon stock potential, indicating its important role in carbon storage and ecosystem balance. Keywords: Biodiversity, Biomass, Carbon Stock  
Co-Authors Adella Shaharani Adha Siagian Almadina Septiyah Alya Febrina Nasution Andini Dwi sekar Asti Hanipah Deni Veronika Sihombing Dian Dara Purba Edty Widya Ningsih Harahap Efrida Pima Sari Tambunan Fitri Asyiah Lubis Hasni Aida Hera Dewi Syahrani Iftitah Pranriska Ika Anindia Putri Kahiruddin Kahiruddin Khairani Khairani Khairuddin Khairuddin Khairunisa Pratiwi Linda Syafitri Siagian Melfa Aisyah Hutasuhut Milda Aulya Misriani Ani Miza Nina Adlini Muhammad Akram Sya'rawi Nadila Husnah Nurul Khairunnisa Sofyan Nurul Miftahul Jannah Oki Permata Sari Pinkhan Aliffia Sekar Andini Pristika Ningsih Rahmadina Rahmadina Rasyidah Riris Nurkholidah Rambe Rizki Amelia Nasution Rizky Ananda Rohani Rohani Sartika Kumala Dalimunthe Sartika Putri Sofiana Gultom Sri Agusna Suci Ramadani Pohan Suheriyana Aulia Pohan Thoibah Sinaga Tiara Ayunda Putri Ulfayani Mayasari Yulia Ananda Simarmata