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Rupa Matheus
Dryland Agricultural Extension Study Program, Kupang State Agricultural Polytechnic
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Immunology & microbiology Social Sciences Veterinary

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Utilization of organic soil amendments and phosphorus fertilizer to improve chemical properties of degraded dry land Vertisol and maize yield Rupa Matheus; Donatus Kantur; Maria K Salli
Journal of Degraded and Mining Lands Management Vol 10, No 2 (2023)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2023.102.4297

Abstract

This study aimed to evaluate the effects of soil amendment and phosphorus fertilizer application techniques on the chemical properties of dry land Vertisols, P absorption efficiency by maize and maize yield. The study was conducted on farmer's land located in Noelbaki Village, Central Kupang District, Kupang Regency, East Nusa Tenggara, Indonesia. The study was conducted during two planting seasons, namely the rainy season 2020/2021 (PS-1) and the dry season 2021 (PS-2). The soil used in this experiment was included in the degraded Vertisols. This study used a split-plot design with three replications. The main plot was the type of organic soil-amendment material, and the subplot was the technique (dose and stage) of applying phosphorus fertilizer sourced from SP-36. The results showed that organic soil amendment and phosphorus fertilizer application techniques could improve soil chemical properties, P uptake, P absorption efficiency and maize yield in Vertisols until the second planting season. In the long term, the combination of maize stover biochar and the technique of applying phosphorus fertilizer (P3-T2) significantly increased the P uptake by 32.31 kg ha-1 (PS-1) and 31.23 kg ha-1 (PS-2), the P absorption efficiency by 28.65% (PS-1) and 27.75% (PS-2). The P3-T2 treatment gave maize yields of 6.92 t ha-1 (PS-1) and 6.92 t ha-1 (PS-2), which were higher than those of other treatments.
UJI EFEKTIVITAS PUPUK GRANULAR ORGANIK LEPAS-LAMBAT BERBASIS BIOCHAR TERMODIFIKASI DAN ASAM HUMAT TERHADAP POLA PELEPASAN HARA PADA TANAMAN KACANG HIJAU Matheus, Rupa; Kantur, Donatus
Partner Vol 30, No 3 (2025): Edisi Khusus 2025
Publisher : Politeknik Pertanian Negeri Kupang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35726/jp.v30i3.7513

Abstract

ABSTRAKPenelitian ini bertujuan untuk mengevaluasi efektivitas pupuk granular organik lepas-lambat berbasis biochar termodifikasi dan asam humat-mikroba terhadap pola pelepasan unsur hara makro (N, P, K) pada tanaman kacang hijau (Vigna radiata L.). Percobaan dilakukan dengan rancangan acak lengkap lima perlakuan dan tiga ulangan, menggunakan formula F0-F4 dengan proporsi biochar dan asam humat yang berbeda. Parameter utama yang diamati meliputi pola pelepasan nitrogen, fosfor, dan kalium selama 60 hari inkubasi, diukur secara berkala dengan metode Kjeldahl, Bray-1, dan NH4OAC 1 M. Hasil menunjukkan bahwa formula F4 (50% bokashi + 30% biochar termodifikasi + 10% asam humat + 10 % aditif) memberikan pola pelepasan hara paling efisien dan stabil. Sinergi ketiga komponen tersebut membentuk sistem multi-mekanisme slowrelease yang menekan kehilangan hara, memperpanjang ketersediaan nutrien, dan memperbaiki keseimbangan kimia-biologi tanah. Potensi biochar-humat-mikroba mendukung efisiensi pemupukan, mengurangi ketergantungan pupuk kimia hingga 30-50%, serta berkontribusi pada keberlanjutan kesuburan lahan kering di Indonesia.Kata kunci: Biochar termodifikasi, Asam humat, Pupuk organik lepas-lambat, Pelepasan hara, Kacang hijau.
Co-Authors Donatus Kantur Kantur, Donatus Maria K Salli