The effect of agricultural waste biochar on the availability of silicon in ultisol and inceptisol under flooded conditions

• Published in: IOP conference series. Earth and environmental science 2022-12, Vol.1114 (1), p.12035
• Main Authors: Widijanto, H, Suntoro, Mujiyo, Syamsiyah, J
• Format: Article
• Language: English
• Subjects: Agricultural wastes; Availability; Charcoal; Confidence intervals; Leaching; Organic carbon; Organic soils; Rice; Sawdust; Silicon; Soil conditions; Soils; Variance analysis
• ISSN: 1755-1307; 1755-1315
• DOI: 10.1088/1755-1315/1114/1/012035

The research was conducted to know the effect of several kinds of biochar on the availability of Silicon (Si) on different soils in a flooded condition. The experiment used a complete randomized design (CRD) with two factors: biochar and soil type. Biochar type consists of B1 = rice straw; B2 = rice husk; B3 = sawdust; B4 = coconut shell; B5 = corn stover. Soil type consists of T1= Inceptisol and T2 = Ultisol. Each treatment is replicated three times. The experiment used 2 kg of soil, and the dose of biochar was 5 tons.ha −1 . Incubation is carried out for four weeks by maintaining a water height of 5 cm. Soil observation parameters include organic carbon, total Si, available Si, water leached Si, and pH H 2 O. The data were analyzed using Analysis of Variance with 95% and 99% confidence levels, Duncan’s Multiple Range Test, and Correlation Test. The results showed that rice husks biochar has a higher total Si and available Si than other biochar. Rice husk biochar gives the highest available Si of Inceptisol (8.66 mg.kg −1 ) and Ultisol (7.49 mg.kg −1 ) compared to the other biochar. Silicon leaching ranges from 5.23-8.66% of soil available Si in both soils.