Pengaruh Ukuran Partikel Biochar Bambu Terhadap Sifat Fisika Tanah, Kadar Hara N, P, K dan Produksi Tanaman Kedelai (Glycine max L.) Selama Dua Musim Tanam (Jagung - Kedelai)
Authors: Fadilah Putri , Manfarizah Manfarizah , Darusman Darusman 
Published: February 2022

Abstrak. Bambu merupakan salah satu bahan baku yang dapat digunakan untuk memproduksi arang aktif karena mempunyai daya adsorbsi dan kapasitas tukar kation yang tinggi. Biochar dengan ukuran partikel yang berbeda memberikan pengaruh yang berbeda terhadap tanah. Penelitian ini menggunakan rancangan acak kelompok (RAK) non faktorial dengan empat perlakuan ukuran partikel biochar yang diulang sebanyak tiga kali sehingga menghasilkan 12 satuan plot percobaan dengan dosis biochar sebanyak 15 ton ha-1. Perlakuannya yaitu P0: Kontrol, P1: Biochar berukuran 5.00 - 2.00 mm, P2: Biochar berukuran 2.00 - 1.00 mm, P3: Biochar berukuran 1.00 - 0.5 mm.Tiga parameter yang diteliti dalam penelitian ini yaitu parameter sifat fisika tanah meliputi Berat volume tanah, Porositas, Permeabilitas, Kapasitas menyimpan air (WHC), Daya hantar listrik (DHL), dan pH tanah (H2O); parameter kadar hara tanah meliputi N-total, P-total, dan K-total; dan parameter produksi meliputi polong berisi, polong hampa, total polong, berat biji kering, berat 100 biji dan produksi tanaman kedelai ton ha-1. Penelitian ini dilaksanakan pada kebun percobaan ACIAR Fakultas Pertanian Universitas Syiah Kuala sejak bulan Juli sampai November 2020, analisis tanah dan kadar hara dilaksanakan di Laboratorium Fisika Tanah dan Laboratorium Penelitian Tanah dan Tanaman, Fakultas Pertanian Universitas Syiah Kuala. Hasil penelitian ini didapatkan bahwa kadar hara N-total dan berat 100 biji berpengaruh sangat nyata pada taraf 1%. Ukuran biochar bambu yang baik secara keseluruhan dalam memperbaiki sifat fisika tanah, kadar hara tanaman, dan produksi tanaman kedelai adalah biochar yang berukuran 1.00 – 0.5 mm (P3).Influence of Different Sizes of Bamboo Biochar on Soil Physical Properties, Nutrient Uptace N, P, K and Soybean Crop Yield During Two Growing Season (Corn -Soybean)Abstract. Bamboo is one of the raw materials that can be used to produce activated biochar because it has high adsorption and cation exchange capacity. Biochar with different particle sizes has different effects on the soil. This study used a non-factorial randomized block design (RBD) with four treatments of biochar size which were repeated three times so as to produce 12 experimental plot units with a biochar dose of 15 tons ha-1. the treatments were P0: Control, P1: Biochar measuring 5.00 - 2.00 mm, P2: Biochar measuring 2.00 - 1.00 mm, P3: Biochar measuring 1.00 - 0.5 mm. Three parameters studied in this study were of soil physical properties including Bulk density, Porosity, Permeability, Water holding capacity (WHC), Electrical conductivity (DHL), and soil pH (H2O); soil nutrient content parameters include N-total, P-total, and K-total; and production parameters include filled pods, empty pods, total pods, dry seed weight, weight of 100 seeds and soybean crop production ton ha-1. This research was carried out at the ACIAR experimental garden, Faculty of Agriculture, Syiah Kuala University from July to November 2020, soil analysis and nutrient content were carried at the Soil Physics Laboratory and Soil and Plant Research Laboratory, Faculty of Agriculture, Syiah Kuala University. The results of this study showed that the total N-nutrient content and weight of 100 seeds had a very significant effect at the 1% level. The overall good size of bamboo biochar in improving soil physical properties, plant nutrient content, and soybean production is biochar measuring 1.00 – 0.5 mm (P3).