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Ni Nyoman Ari Putri Murtiyah
Universitas Dwijendra
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KAJIAN KARAKTERISTIK FISIK PUPUK GRANUL UREA-BIOCHAR BAMBU BERSELAPUT ASAM AKRILAT Ni Nyoman Ari Putri Murtiyah; Ni Ketut Karina Sari; Dewa Ayu Ari Febriyanti; I Wayan Dirgayana
Unesa Journal of Chemistry Vol. 15 No. 1 (2026): Vol 15 No 1
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ujc.v15n1.p7-13

Abstract

Nitrogen use efficiency in conventional urea fertilizers remains low due to nutrient loss through leaching and volatilization. This study aims to develop and characterize a slow-release fertilizer (SRF) based on a bamboo biochar matrix coated with acrylic acid polymer. The fertilizers were formulated into granules using coating and matrix methods with urea proportions of 25%, 30%, and 35%. Characterization included physical properties, surface morphology, and elemental composition using Scanning Electron Microscopy-Energy Dispersive X-Ray Spectroscopy (SEM-EDS). The results showed that the produced granules were dominated by sizes of 2–5 mm, ranging from 80.17% to 92.50%, complying with the Ministry of Agriculture Regulation (Permentan) No. 01 of 2019. SEM analysis confirmed that acrylic acid successfully encapsulated the pores of the bamboo biochar and urea, forming a physical barrier structure that extends the nutrient diffusion path. EDS spectra verified the successful impregnation of urea into the matrix, with Nitrogen (N) retention of 41.15% for the coating method and 27.97% for the matrix method. The presence of bamboo biochar micropores and the polymer layer aligns with slow-release principles, enhancing agronomic efficiency while minimizing environmental impacts.
Analisis Karakteristik Fisik Pupuk Lambat Biochar Bambu Berselaput Asam Akrilat Menggunakan SEM-EDS Ni Nyoman Ari Putri Murtiyah; I Wayan Suardika
ULIL ALBAB : Jurnal Ilmiah Multidisiplin Vol. 5 No. 8: Juli 2026
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/jim.v5i8.19773

Abstract

Salah satu upaya untuk meningkatkan efisiensi serapan pupuk nitrogen (khususnya urea) adalah dengan membuat pupuk dalam lepas lambat. Pupuk lepas lambat dapat dibuat dengan melapisi pupuk tersebut dengan metode salut dan matrik. Tujuan penelitian ini adalah untuk mengetahui karakteristik fisik pupuk urea-biochar bambu berselaput asam akrilat. Penelitian dilakukan di Laboratorium Ilmu Tanah dan Lingkungan Fakultas Pertanian Universitas Udayana dan di Laboratorium Karakterisasi Lanjut I Fisika, Pusat Riset Fisika Kuantum Puspiptek-Serpong (Badan Riset dan Inovasi Nasional). Pupuk lepas lambat dalam penelitian ini dibuat dengan cara memodifikasi pupuk urea lepas lambat dalam bentuk granul yang dibuat dengan metode salut dan matriks dengan menambahkan arang (biochar) bambu sebagai penjerap dan asam akrilat sebagai pengemulsi dan perekat. Parameter yang diamati adalah karakteristik fisik pupuk granul meliputi persentase ukuran granul dan komposisi unsur granul biochar dengan menggunakan SEM-EDS. Hasil analisis SEM-EDS menunjukkan bahwa pupuk granul urea biochar dengan metode salut maupun matrik memiliki kandungan nitrogen (N), karbon (C), Oksigen (O), Silika (Si) dan kalium (K) dan memiliki persentase ukuran yang di dominansi oleh ukuran granul yang berukuran 2-5 mm.
Co-Authors Dewa Ayu Ari Febriyanti I Wayan Suardika Ni Ketut Karina Sari